1914 Commits

Author SHA1 Message Date
Tashfin Shakeer Rhythm
a9566ccc56 msm-4.14: Make macros no-op using ((void)0)
Do not solely rely on compiler optimizations to get the workaround
of having macros do nothing using an empty do-while loop. It's
inefficient.

Use ((void)0) to which the standard assert macro expands when NDEBUG
is defined.

No functional change intended.

[mcdofrenchfreis]:
Implement this patch to tree using the command:
git grep -l "do {} while (0)" | xargs sed -i "s/do {} while (0)/((void)0)/g"

Change-Id: I9615c62c46670e31ed8d0d89d195144541baa3e6
Signed-off-by: Tashfin Shakeer Rhythm <tashfinshakeerrhythm@gmail.com>
Signed-off-by: mcdofrenchfreis <xyzevan@androidist.net>
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
2025-01-17 00:51:10 -03:00
Richard Raya
1b9f971175 This is the 4.14.353 OpenELA-Extended LTS stable release
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Merge tag 'v4.14.353-openela' of https://github.com/openela/kernel-lts

This is the 4.14.353 OpenELA-Extended LTS stable release

* tag 'v4.14.353-openela' of https://github.com/openela/kernel-lts: (173 commits)
  LTS: Update to 4.14.353
  net: fix __dst_negative_advice() race
  selftests: make order checking verbose in msg_zerocopy selftest
  selftests: fix OOM in msg_zerocopy selftest
  Revert "selftests/net: reap zerocopy completions passed up as ancillary data."
  Revert "selftests: fix OOM in msg_zerocopy selftest"
  Revert "selftests: make order checking verbose in msg_zerocopy selftest"
  nvme/pci: Add APST quirk for Lenovo N60z laptop
  exec: Fix ToCToU between perm check and set-uid/gid usage
  drm/i915/gem: Fix Virtual Memory mapping boundaries calculation
  drm/i915: Try GGTT mmapping whole object as partial
  netfilter: nf_tables: set element extended ACK reporting support
  kbuild: Fix '-S -c' in x86 stack protector scripts
  drm/mgag200: Set DDC timeout in milliseconds
  drm/bridge: analogix_dp: properly handle zero sized AUX transactions
  drm/bridge: analogix_dp: Properly log AUX CH errors
  drm/bridge: analogix_dp: Reset aux channel if an error occurred
  drm/bridge: analogix_dp: Check AUX_EN status when doing AUX transfer
  x86/mtrr: Check if fixed MTRRs exist before saving them
  tracing: Fix overflow in get_free_elt()
  ...

Change-Id: I0e92a979e31d4fa6c526c6b70a1b61711d9747bb
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
2024-10-11 00:50:20 -03:00
Paolo Pisati
1ac49c559c m68k: amiga: Turn off Warp1260 interrupts during boot
commit 1d8491d3e726984343dd8c3cdbe2f2b47cfdd928 upstream.

On an Amiga 1200 equipped with a Warp1260 accelerator, an interrupt
storm coming from the accelerator board causes the machine to crash in
local_irq_enable() or auto_irq_enable().  Disabling interrupts for the
Warp1260 in amiga_parse_bootinfo() fixes the problem.

Link: https://lore.kernel.org/r/ZkjwzVwYeQtyAPrL@amaterasu.local
Cc: stable <stable@kernel.org>
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20240601153254.186225-1-p.pisati@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 296185ef87e6184e364bd9e7c983089b8e606a55)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-10-10 10:27:23 +00:00
Thorsten Blum
8bc40077dd m68k: cmpxchg: Fix return value for default case in __arch_xchg()
[ Upstream commit 21b9e722ad28c19c2bc83f18f540b3dbd89bf762 ]

The return value of __invalid_xchg_size() is assigned to tmp instead of
the return variable x. Assign it to x instead.

Fixes: 2501cf768e4009a0 ("m68k: Fix xchg/cmpxchg to fail to link if given an inappropriate pointer")
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/20240702034116.140234-2-thorsten.blum@toblux.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 8c43fbd39500ce7bdc779a772752cc2b436a692c)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-10-10 10:27:20 +00:00
Eero Tamminen
266d74e904 m68k: atari: Fix TT bootup freeze / unexpected (SCU) interrupt messages
[ Upstream commit f70065a9fd988983b2c693631b801f25a615fc04 ]

Avoid freeze on Atari TT / MegaSTe boot with continuous messages of:

	unexpected interrupt from 112

Which was due to VBL interrupt being enabled in SCU sys mask, but there
being no handler for that any more.

(Bug and fix were first verified on real Atari TT HW by Christian,
 this patch later on in Hatari emulator.)

Fixes: 1fa0b29f3a43f9dd ("fbdev: Kill Atari vblank cursor blinking")
Reported-by: Nicolas Pomarède <npomarede@corp.free.fr>
Closes: https://listengine.tuxfamily.org/lists.tuxfamily.org/hatari-devel/2024/06/msg00016.html
Closes: https://lore.kernel.org/all/9aa793d7-82ed-4fbd-bce5-60810d8a9119@helsinkinet.fi
Tested-by: Christian Zietz <czietz@gmx.net>
Signed-off-by: Eero Tamminen <oak@helsinkinet.fi>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/20240624144901.5236-1-oak@helsinkinet.fi
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit b6c2b179b6908e439b2385c25d7b3477e4be4dce)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-10-10 10:27:20 +00:00
Richard Raya
fad3b5236d This is the 4.14.349 OpenELA-Extended LTS stable release
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Merge tag 'v4.14.349-openela' of https://github.com/openela/kernel-lts

This is the 4.14.349 OpenELA-Extended LTS stable release

* tag 'v4.14.349-openela' of https://github.com/openela/kernel-lts: (160 commits)
  LTS: Update to 4.14.349
  x86/kvm: Disable all PV features on crash
  x86/kvm: Disable kvmclock on all CPUs on shutdown
  x86/kvm: Teardown PV features on boot CPU as well
  crypto: algif_aead - fix uninitialized ctx->init
  nfs: fix undefined behavior in nfs_block_bits()
  ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()
  sparc: move struct termio to asm/termios.h
  kdb: Use format-specifiers rather than memset() for padding in kdb_read()
  kdb: Merge identical case statements in kdb_read()
  kdb: Fix console handling when editing and tab-completing commands
  kdb: Use format-strings rather than '\0' injection in kdb_read()
  kdb: Fix buffer overflow during tab-complete
  sparc64: Fix number of online CPUs
  intel_th: pci: Add Meteor Lake-S CPU support
  net/9p: fix uninit-value in p9_client_rpc()
  crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak
  KVM: arm64: Allow AArch32 PSTATE.M to be restored as System mode
  netfilter: nft_dynset: relax superfluous check on set updates
  netfilter: nft_dynset: report EOPNOTSUPP on missing set feature
  ...

Change-Id: Idb0053e6b2186ef17f31e15fdb601ae451c81283
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
2024-07-18 01:54:59 -03:00
Finn Thain
3d47f159d4 m68k: mac: Fix reboot hang on Mac IIci
[ Upstream commit 265a3b322df9a973ff1fc63da70af456ab6ae1d6 ]

Calling mac_reset() on a Mac IIci does reset the system, but what
follows is a POST failure that requires a manual reset to resolve.
Avoid that by using the 68030 asm implementation instead of the C
implementation.

Apparently the SE/30 has a similar problem as it has used the asm
implementation since before git. This patch extends that solution to
other systems with a similar ROM.

After this patch, the only systems still using the C implementation are
68040 systems where adb_type is either MAC_ADB_IOP or MAC_ADB_II. This
implies a 1 MiB Quadra ROM.

This now includes the Quadra 900/950, which previously fell through to
the "should never get here" catch-all.

Reported-and-tested-by: Stan Johnson <userm57@yahoo.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/480ebd1249d229c6dc1f3f1c6d599b8505483fd8.1714797072.git.fthain@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 8055e882c57031a5ca7fbf278796c19ded9f9d6f)
[Vegard: fix conflicts due to missing commits
 6df2afba7a87afa71d4baf9875ec846d3040f9bb ("m68k/mac: Enable RTC for
 100-series PowerBooks") and ebd722275f9cfc6752e29d2412fa3816ca05764b
 ("macintosh/via-pmu: Replace via-pmu68k driver with via-pmu driver").]
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-07-08 08:15:00 +00:00
Finn Thain
4e23b79c4b m68k/mac: Use '030 reset method on SE/30
[ Upstream commit 9c0e91f6b701dce6902408d50c4df9cebe4744f5 ]

The comment says that calling the ROM routine doesn't work. But testing
shows that the 68030 fall-back reset method does work, so just use that.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Stable-dep-of: 265a3b322df9 ("m68k: mac: Fix reboot hang on Mac IIci")
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit c96430d59c71a0e5c641b5267ccf141c501fe15e)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-07-08 08:14:59 +00:00
Michael Schmitz
314fdca9aa m68k: Fix spinlock race in kernel thread creation
[ Upstream commit da89ce46f02470ef08f0f580755d14d547da59ed ]

Context switching does take care to retain the correct lock owner across
the switch from 'prev' to 'next' tasks.  This does rely on interrupts
remaining disabled for the entire duration of the switch.

This condition is guaranteed for normal process creation and context
switching between already running processes, because both 'prev' and
'next' already have interrupts disabled in their saved copies of the
status register.

The situation is different for newly created kernel threads.  The status
register is set to PS_S in copy_thread(), which does leave the IPL at 0.
Upon restoring the 'next' thread's status register in switch_to() aka
resume(), interrupts then become enabled prematurely.  resume() then
returns via ret_from_kernel_thread() and schedule_tail() where run queue
lock is released (see finish_task_switch() and finish_lock_switch()).

A timer interrupt calling scheduler_tick() before the lock is released
in finish_task_switch() will find the lock already taken, with the
current task as lock owner.  This causes a spinlock recursion warning as
reported by Guenter Roeck.

As far as I can ascertain, this race has been opened in commit
533e6903bea0 ("m68k: split ret_from_fork(), simplify kernel_thread()")
but I haven't done a detailed study of kernel history so it may well
predate that commit.

Interrupts cannot be disabled in the saved status register copy for
kernel threads (init will complain about interrupts disabled when
finally starting user space).  Disable interrupts temporarily when
switching the tasks' register sets in resume().

Note that a simple oriw 0x700,%sr after restoring sr is not enough here
- this leaves enough of a race for the 'spinlock recursion' warning to
still be observed.

Tested on ARAnyM and qemu (Quadra 800 emulation).

Fixes: 533e6903bea0 ("m68k: split ret_from_fork(), simplify kernel_thread()")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/all/07811b26-677c-4d05-aeb4-996cd880b789@roeck-us.net
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20240411033631.16335-1-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 2a8d1d95302c7d52c6ac8fa5cb4a6948ae0d3a14)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-07-08 08:14:59 +00:00
Finn Thain
cbe81c90b0 m68k/mac: Add mutual exclusion for IOP interrupt polling
The IOP interrupt handler iop_ism_irq() is used by the adb-iop
driver to poll for ADB request completion. Unfortunately, it is not
re-entrant. Fix the race condition by adding an iop_ism_irq_poll()
function with suitable mutual exclusion.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
(cherry picked from commit 92178fcabbcd39fc9ccd4e58ec4be83dd5323a46)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-07-08 08:14:55 +00:00
Richard Raya
9cdc78c354 Merge branch 'android-4.14-stable' of https://android.googlesource.com/kernel/common
* 'android-4.14-stable' of https://android.googlesource.com/kernel/common: (2966 commits)
  Linux 4.14.331
  net: sched: fix race condition in qdisc_graft()
  scsi: virtio_scsi: limit number of hw queues by nr_cpu_ids
  ext4: remove gdb backup copy for meta bg in setup_new_flex_group_blocks
  ext4: correct return value of ext4_convert_meta_bg
  ext4: correct offset of gdb backup in non meta_bg group to update_backups
  ext4: apply umask if ACL support is disabled
  media: venus: hfi: fix the check to handle session buffer requirement
  media: sharp: fix sharp encoding
  i2c: i801: fix potential race in i801_block_transaction_byte_by_byte
  net: dsa: lan9303: consequently nested-lock physical MDIO
  ALSA: info: Fix potential deadlock at disconnection
  parisc/pgtable: Do not drop upper 5 address bits of physical address
  parisc: Prevent booting 64-bit kernels on PA1.x machines
  mcb: fix error handling for different scenarios when parsing
  jbd2: fix potential data lost in recovering journal raced with synchronizing fs bdev
  genirq/generic_chip: Make irq_remove_generic_chip() irqdomain aware
  mmc: meson-gx: Remove setting of CMD_CFG_ERROR
  PM: hibernate: Clean up sync_read handling in snapshot_write_next()
  PM: hibernate: Use __get_safe_page() rather than touching the list
  ...

Change-Id: I755d2aa7c525ace28adc4aee433572b3110ea39b
2023-12-07 20:15:44 -03:00
Ben Hutchings
96ce67041e m68k: Fix invalid .section syntax
[ Upstream commit 922a9bd138101e3e5718f0f4d40dba68ef89bb43 ]

gas supports several different forms for .section for ELF targets,
including:
    .section NAME [, "FLAGS"[, @TYPE[,FLAG_SPECIFIC_ARGUMENTS]]]
and:
    .section "NAME"[, #FLAGS...]

In several places we use a mix of these two forms:
    .section NAME, #FLAGS...

A current development snapshot of binutils (2.40.50.20230611) treats
this mixed syntax as an error.

Change to consistently use:
    .section NAME, "FLAGS"
as is used elsewhere in the kernel.

Link: https://buildd.debian.org/status/fetch.php?pkg=linux&arch=m68k&ver=6.4%7Erc6-1%7Eexp1&stamp=1686907300&raw=1
Signed-off-by: Ben Hutchings <benh@debian.org>
Tested-by: Jan-Benedict Glaw <jbglaw@lug-owl.de>
Link: https://lore.kernel.org/r/ZIyBaueWT9jnTwRC@decadent.org.uk
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-09-23 10:46:53 +02:00
Thomas Gleixner
433002684d m68k/cpu: Switch to arch_cpu_finalize_init()
commit 9ceecc2589b9d7cef6b321339ed8de484eac4b20 upstream

check_bugs() is about to be phased out. Switch over to the new
arch_cpu_finalize_init() implementation.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230613224545.254342916@linutronix.de
Signed-off-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-08 19:48:23 +02:00
Finn Thain
f900a4a3a6 m68k: Move signal frame following exception on 68020/030
commit b845b574f86dcb6a70dfa698aa87a237b0878d2a upstream.

On 68030/020, an instruction such as, moveml %a2-%a3/%a5,%sp@- may cause
a stack page fault during instruction execution (i.e. not at an
instruction boundary) and produce a format 0xB exception frame.

In this situation, the value of USP will be unreliable.  If a signal is
to be delivered following the exception, this USP value is used to
calculate the location for a signal frame.  This can result in a
corrupted user stack.

The corruption was detected in dash (actually in glibc) where it showed
up as an intermittent "stack smashing detected" message and crash
following signal delivery for SIGCHLD.

It was hard to reproduce that failure because delivery of the signal
raced with the page fault and because the kernel places an unpredictable
gap of up to 7 bytes between the USP and the signal frame.

A format 0xB exception frame can be produced by a bus error or an
address error.  The 68030 Users Manual says that address errors occur
immediately upon detection during instruction prefetch.  The instruction
pipeline allows prefetch to overlap with other instructions, which means
an address error can arise during the execution of a different
instruction.  So it seems likely that this patch may help in the address
error case also.

Reported-and-tested-by: Stan Johnson <userm57@yahoo.com>
Link: https://lore.kernel.org/all/CAMuHMdW3yD22_ApemzW_6me3adq6A458u1_F0v-1EYwK_62jPA@mail.gmail.com/
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: stable@vger.kernel.org
Co-developed-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/9e66262a754fcba50208aa424188896cc52a1dd1.1683365892.git.fthain@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-30 12:38:37 +01:00
Michael Schmitz
1a6059f5ed m68k: Only force 030 bus error if PC not in exception table
[ Upstream commit e36a82bebbf7da814530d5a179bef9df5934b717 ]

__get_kernel_nofault() does copy data in supervisor mode when
forcing a task backtrace log through /proc/sysrq_trigger.
This is expected cause a bus error exception on e.g. NULL
pointer dereferencing when logging a kernel task has no
workqueue associated. This bus error ought to be ignored.

Our 030 bus error handler is ill equipped to deal with this:

Whenever ssw indicates a kernel mode access on a data fault,
we don't even attempt to handle the fault and instead always
send a SEGV signal (or panic). As a result, the check
for exception handling at the fault PC (buried in
send_sig_fault() which gets called from do_page_fault()
eventually) is never used.

In contrast, both 040 and 060 access error handlers do not
care whether a fault happened on supervisor mode access,
and will call do_page_fault() on those, ultimately honoring
the exception table.

Add a check in bus_error030 to call do_page_fault() in case
we do have an entry for the fault PC in our exception table.

I had attempted a fix for this earlier in 2019 that did rely
on testing pagefault_disabled() (see link below) to achieve
the same thing, but this patch should be more generic.

Tested on 030 Atari Falcon.

Reported-by: Eero Tamminen <oak@helsinkinet.fi>
Link: https://lore.kernel.org/r/alpine.LNX.2.21.1904091023540.25@nippy.intranet
Link: https://lore.kernel.org/r/63130691-1984-c423-c1f2-73bfd8d3dcd3@gmail.com
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230301021107.26307-1-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-05 11:14:17 +02:00
Michael Schmitz
8a563ac3aa m68k: Check syscall_trace_enter() return code
[ Upstream commit 2ca8a1de4437f21562e57f9ac123914747a8e7a1 ]

Check return code of syscall_trace_enter(), and skip syscall
if -1. Return code will be left at what had been set by
ptrace or seccomp (in regs->d0).

No regression seen in testing with strace on ARAnyM.

Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230112035529.13521-2-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-11 16:26:42 +01:00
Randy Dunlap
8972b8b0c9 m68k: /proc/hardware should depend on PROC_FS
[ Upstream commit 1e5b5df65af99013b4d31607ddb3ca5731dbe44d ]

When CONFIG_PROC_FS is not set, there is a build error for an unused
function. Make PROC_HARDWARE depend on PROC_FS to prevent this error.

In file included from ../arch/m68k/kernel/setup.c:3:
../arch/m68k/kernel/setup_mm.c:477:12: error: 'hardware_proc_show' defined but not used [-Werror=unused-function]
  477 | static int hardware_proc_show(struct seq_file *m, void *v)
      |            ^~~~~~~~~~~~~~~~~~

Fixes: 66d857b08b8c ("m68k: merge m68k and m68knommu arch directories") # v3.0
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230209010825.24136-1-rdunlap@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-11 16:26:37 +01:00
Eric W. Biederman
5eded74b49 exit: Add and use make_task_dead.
commit 0e25498f8cd43c1b5aa327f373dd094e9a006da7 upstream.

There are two big uses of do_exit.  The first is it's design use to be
the guts of the exit(2) system call.  The second use is to terminate
a task after something catastrophic has happened like a NULL pointer
in kernel code.

Add a function make_task_dead that is initialy exactly the same as
do_exit to cover the cases where do_exit is called to handle
catastrophic failure.  In time this can probably be reduced to just a
light wrapper around do_task_dead. For now keep it exactly the same so
that there will be no behavioral differences introducing this new
concept.

Replace all of the uses of do_exit that use it for catastraphic
task cleanup with make_task_dead to make it clear what the code
is doing.

As part of this rename rewind_stack_do_exit
rewind_stack_and_make_dead.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-06 07:46:33 +01:00
azrim
9c642251ed
Merge remote-tracking branch 'google/android-4.14-stable' into richelieu
* google/android-4.14-stable:
  UPSTREAM: lib/vsprintf: Hash printed address for netdev bits fallback
  UPSTREAM: lib/vsprintf: Prepare for more general use of ptr_to_id()
  UPSTREAM: lib/vsprintf: Make ptr argument conts in ptr_to_id()
  UPSTREAM: vsprintf: Replace memory barrier with static_key for random_ptr_key update
  UPSTREAM: lib/test_printf.c: accept "ptrval" as valid result for plain 'p' tests
  UPSTREAM: lib/vsprintf: Do not handle %pO[^F] as %px
  BACKPORT: l2tp: fix race in pppol2tp_release with session object destroy
  BACKPORT: l2tp: don't use inet_shutdown on ppp session destroy
  Linux 4.14.285
  tcp: drop the hash_32() part from the index calculation
  tcp: increase source port perturb table to 2^16
  tcp: dynamically allocate the perturb table used by source ports
  tcp: add small random increments to the source port
  tcp: use different parts of the port_offset for index and offset
  tcp: add some entropy in __inet_hash_connect()
  xprtrdma: fix incorrect header size calculations
  usb: gadget: u_ether: fix regression in setting fixed MAC address
  s390/mm: use non-quiescing sske for KVM switch to keyed guest
  l2tp: fix race in pppol2tp_release with session object destroy
  l2tp: don't use inet_shutdown on ppp session destroy
  virtio-pci: Remove wrong address verification in vp_del_vqs()
  ext4: add reserved GDT blocks check
  ext4: make variable "count" signed
  ext4: fix bug_on ext4_mb_use_inode_pa
  serial: 8250: Store to lsr_save_flags after lsr read
  usb: gadget: lpc32xx_udc: Fix refcount leak in lpc32xx_udc_probe
  usb: dwc2: Fix memory leak in dwc2_hcd_init
  USB: serial: io_ti: add Agilent E5805A support
  USB: serial: option: add support for Cinterion MV31 with new baseline
  comedi: vmk80xx: fix expression for tx buffer size
  irqchip/gic/realview: Fix refcount leak in realview_gic_of_init
  certs/blacklist_hashes.c: fix const confusion in certs blacklist
  arm64: ftrace: fix branch range checks
  net: bgmac: Fix an erroneous kfree() in bgmac_remove()
  misc: atmel-ssc: Fix IRQ check in ssc_probe
  tty: goldfish: Fix free_irq() on remove
  i40e: Fix call trace in setup_tx_descriptors
  pNFS: Don't keep retrying if the server replied NFS4ERR_LAYOUTUNAVAILABLE
  random: credit cpu and bootloader seeds by default
  net: ethernet: mtk_eth_soc: fix misuse of mem alloc interface netdev[napi]_alloc_frag
  ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
  nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred
  virtio-mmio: fix missing put_device() when vm_cmdline_parent registration failed
  scsi: pmcraid: Fix missing resource cleanup in error case
  scsi: ipr: Fix missing/incorrect resource cleanup in error case
  scsi: lpfc: Fix port stuck in bypassed state after LIP in PT2PT topology
  scsi: vmw_pvscsi: Expand vcpuHint to 16 bits
  ASoC: wm8962: Fix suspend while playing music
  ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo()
  ASoC: cs42l56: Correct typo in minimum level for SX volume controls
  ASoC: cs42l52: Correct TLV for Bypass Volume
  ASoC: cs53l30: Correct number of volume levels on SX controls
  ASoC: cs42l52: Fix TLV scales for mixer controls
  random: account for arch randomness in bits
  random: mark bootloader randomness code as __init
  random: avoid checking crng_ready() twice in random_init()
  crypto: drbg - make reseeding from get_random_bytes() synchronous
  crypto: drbg - always try to free Jitter RNG instance
  crypto: drbg - move dynamic ->reseed_threshold adjustments to __drbg_seed()
  crypto: drbg - track whether DRBG was seeded with !rng_is_initialized()
  crypto: drbg - prepare for more fine-grained tracking of seeding state
  crypto: drbg - always seeded with SP800-90B compliant noise source
  crypto: drbg - add FIPS 140-2 CTRNG for noise source
  Revert "random: use static branch for crng_ready()"
  random: check for signals after page of pool writes
  random: wire up fops->splice_{read,write}_iter()
  random: convert to using fops->write_iter()
  random: move randomize_page() into mm where it belongs
  random: move initialization functions out of hot pages
  random: use proper return types on get_random_{int,long}_wait()
  random: remove extern from functions in header
  random: use static branch for crng_ready()
  random: credit architectural init the exact amount
  random: handle latent entropy and command line from random_init()
  random: use proper jiffies comparison macro
  random: remove ratelimiting for in-kernel unseeded randomness
  random: avoid initializing twice in credit race
  random: use symbolic constants for crng_init states
  siphash: use one source of truth for siphash permutations
  random: help compiler out with fast_mix() by using simpler arguments
  random: do not use input pool from hard IRQs
  random: order timer entropy functions below interrupt functions
  random: do not pretend to handle premature next security model
  random: do not use batches when !crng_ready()
  random: insist on random_get_entropy() existing in order to simplify
  xtensa: use fallback for random_get_entropy() instead of zero
  sparc: use fallback for random_get_entropy() instead of zero
  um: use fallback for random_get_entropy() instead of zero
  x86/tsc: Use fallback for random_get_entropy() instead of zero
  nios2: use fallback for random_get_entropy() instead of zero
  arm: use fallback for random_get_entropy() instead of zero
  mips: use fallback for random_get_entropy() instead of just c0 random
  m68k: use fallback for random_get_entropy() instead of zero
  timekeeping: Add raw clock fallback for random_get_entropy()
  powerpc: define get_cycles macro for arch-override
  alpha: define get_cycles macro for arch-override
  parisc: define get_cycles macro for arch-override
  s390: define get_cycles macro for arch-override
  ia64: define get_cycles macro for arch-override
  init: call time_init() before rand_initialize()
  random: fix sysctl documentation nits
  random: document crng_fast_key_erasure() destination possibility
  random: make random_get_entropy() return an unsigned long
  random: check for signals every PAGE_SIZE chunk of /dev/[u]random
  random: check for signal_pending() outside of need_resched() check
  random: do not allow user to keep crng key around on stack
  random: do not split fast init input in add_hwgenerator_randomness()
  random: mix build-time latent entropy into pool at init
  random: re-add removed comment about get_random_{u32,u64} reseeding
  random: treat bootloader trust toggle the same way as cpu trust toggle
  random: skip fast_init if hwrng provides large chunk of entropy
  random: check for signal and try earlier when generating entropy
  random: reseed more often immediately after booting
  random: make consistent usage of crng_ready()
  random: use SipHash as interrupt entropy accumulator
  random: replace custom notifier chain with standard one
  random: don't let 644 read-only sysctls be written to
  random: give sysctl_random_min_urandom_seed a more sensible value
  random: do crng pre-init loading in worker rather than irq
  random: unify cycles_t and jiffies usage and types
  random: cleanup UUID handling
  random: only wake up writers after zap if threshold was passed
  random: round-robin registers as ulong, not u32
  random: clear fast pool, crng, and batches in cpuhp bring up
  random: pull add_hwgenerator_randomness() declaration into random.h
  random: check for crng_init == 0 in add_device_randomness()
  random: unify early init crng load accounting
  random: do not take pool spinlock at boot
  random: defer fast pool mixing to worker
  random: rewrite header introductory comment
  random: group sysctl functions
  random: group userspace read/write functions
  random: group entropy collection functions
  random: group entropy extraction functions
  random: group initialization wait functions
  random: remove whitespace and reorder includes
  random: remove useless header comment
  random: introduce drain_entropy() helper to declutter crng_reseed()
  random: deobfuscate irq u32/u64 contributions
  random: add proper SPDX header
  random: remove unused tracepoints
  random: remove ifdef'd out interrupt bench
  random: tie batched entropy generation to base_crng generation
  random: zero buffer after reading entropy from userspace
  random: remove outdated INT_MAX >> 6 check in urandom_read()
  random: use hash function for crng_slow_load()
  random: absorb fast pool into input pool after fast load
  random: do not xor RDRAND when writing into /dev/random
  random: ensure early RDSEED goes through mixer on init
  random: inline leaves of rand_initialize()
  random: use RDSEED instead of RDRAND in entropy extraction
  random: fix locking in crng_fast_load()
  random: remove batched entropy locking
  random: remove use_input_pool parameter from crng_reseed()
  random: make credit_entropy_bits() always safe
  random: always wake up entropy writers after extraction
  random: use linear min-entropy accumulation crediting
  random: simplify entropy debiting
  random: use computational hash for entropy extraction
  random: only call crng_finalize_init() for primary_crng
  random: access primary_pool directly rather than through pointer
  random: continually use hwgenerator randomness
  random: simplify arithmetic function flow in account()
  random: access input_pool_data directly rather than through pointer
  random: cleanup fractional entropy shift constants
  random: prepend remaining pool constants with POOL_
  random: de-duplicate INPUT_POOL constants
  random: remove unused OUTPUT_POOL constants
  random: rather than entropy_store abstraction, use global
  random: try to actively add entropy rather than passively wait for it
  random: remove unused extract_entropy() reserved argument
  random: remove incomplete last_data logic
  random: cleanup integer types
  crypto: chacha20 - Fix chacha20_block() keystream alignment (again)
  random: cleanup poolinfo abstraction
  random: fix typo in comments
  random: don't reset crng_init_cnt on urandom_read()
  random: avoid superfluous call to RDRAND in CRNG extraction
  random: early initialization of ChaCha constants
  random: initialize ChaCha20 constants with correct endianness
  random: use IS_ENABLED(CONFIG_NUMA) instead of ifdefs
  random: harmonize "crng init done" messages
  random: mix bootloader randomness into pool
  random: do not re-init if crng_reseed completes before primary init
  random: do not sign extend bytes for rotation when mixing
  random: use BLAKE2s instead of SHA1 in extraction
  random: remove unused irq_flags argument from add_interrupt_randomness()
  random: document add_hwgenerator_randomness() with other input functions
  crypto: blake2s - adjust include guard naming
  crypto: blake2s - include <linux/bug.h> instead of <asm/bug.h>
  MAINTAINERS: co-maintain random.c
  random: remove dead code left over from blocking pool
  random: avoid arch_get_random_seed_long() when collecting IRQ randomness
  random: add arch_get_random_*long_early()
  powerpc: Use bool in archrandom.h
  linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check
  linux/random.h: Use false with bool
  linux/random.h: Remove arch_has_random, arch_has_random_seed
  s390: Remove arch_has_random, arch_has_random_seed
  powerpc: Remove arch_has_random, arch_has_random_seed
  x86: Remove arch_has_random, arch_has_random_seed
  random: avoid warnings for !CONFIG_NUMA builds
  random: split primary/secondary crng init paths
  random: remove some dead code of poolinfo
  random: fix typo in add_timer_randomness()
  random: Add and use pr_fmt()
  random: convert to ENTROPY_BITS for better code readability
  random: remove unnecessary unlikely()
  random: remove kernel.random.read_wakeup_threshold
  random: delete code to pull data into pools
  random: remove the blocking pool
  random: fix crash on multiple early calls to add_bootloader_randomness()
  char/random: silence a lockdep splat with printk()
  random: make /dev/random be almost like /dev/urandom
  random: ignore GRND_RANDOM in getentropy(2)
  random: add GRND_INSECURE to return best-effort non-cryptographic bytes
  random: Add a urandom_read_nowait() for random APIs that don't warn
  random: Don't wake crng_init_wait when crng_init == 1
  lib/crypto: sha1: re-roll loops to reduce code size
  lib/crypto: blake2s: move hmac construction into wireguard
  crypto: blake2s - generic C library implementation and selftest
  crypto: Deduplicate le32_to_cpu_array() and cpu_to_le32_array()
  Revert "hwrng: core - Freeze khwrng thread during suspend"
  char/random: Add a newline at the end of the file
  random: Use wait_event_freezable() in add_hwgenerator_randomness()
  fdt: add support for rng-seed
  random: Support freezable kthreads in add_hwgenerator_randomness()
  random: fix soft lockup when trying to read from an uninitialized blocking pool
  latent_entropy: avoid build error when plugin cflags are not set
  random: document get_random_int() family
  random: move rand_initialize() earlier
  random: only read from /dev/random after its pool has received 128 bits
  drivers/char/random.c: make primary_crng static
  drivers/char/random.c: remove unused stuct poolinfo::poolbits
  drivers/char/random.c: constify poolinfo_table
  random: make CPU trust a boot parameter
  random: Make crng state queryable
  random: remove preempt disabled region
  random: add a config option to trust the CPU's hwrng
  random: Return nbytes filled from hw RNG
  random: Fix whitespace pre random-bytes work
  drivers/char/random.c: remove unused dont_count_entropy
  random: optimize add_interrupt_randomness
  random: always fill buffer in get_random_bytes_wait
  crypto: chacha20 - Fix keystream alignment for chacha20_block()
  9p: missing chunk of "fs/9p: Don't update file type when updating file attributes"
  UPSTREAM: ext4: verify dir block before splitting it
  UPSTREAM: ext4: fix use-after-free in ext4_rename_dir_prepare
  BACKPORT: ext4: Only advertise encrypted_casefold when encryption and unicode are enabled
  BACKPORT: ext4: fix no-key deletion for encrypt+casefold
  BACKPORT: ext4: optimize match for casefolded encrypted dirs
  BACKPORT: ext4: handle casefolding with encryption
  Revert "ANDROID: ext4: Handle casefolding with encryption"
  Revert "ANDROID: ext4: Optimize match for casefolded encrypted dirs"
  Revert "ext4: fix use-after-free in ext4_rename_dir_prepare"
  Revert "ext4: verify dir block before splitting it"
  Linux 4.14.284
  x86/speculation/mmio: Print SMT warning
  KVM: x86/speculation: Disable Fill buffer clear within guests
  x86/speculation/mmio: Reuse SRBDS mitigation for SBDS
  x86/speculation/srbds: Update SRBDS mitigation selection
  x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data
  x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
  x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations
  x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
  x86/speculation: Add a common function for MD_CLEAR mitigation update
  x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug
  Documentation: Add documentation for Processor MMIO Stale Data
  x86/cpu: Add another Alder Lake CPU to the Intel family
  x86/cpu: Add Lakefield, Alder Lake and Rocket Lake models to the to Intel CPU family
  x86/cpu: Add Comet Lake to the Intel CPU models header
  x86/CPU: Add more Icelake model numbers
  x86/CPU: Add Icelake model number
  x86/cpu: Add Cannonlake to Intel family
  x86/cpu: Add Jasper Lake to Intel family
  cpu/speculation: Add prototype for cpu_show_srbds()
  x86/cpu: Add Elkhart Lake to Intel family
  Linux 4.14.283
  tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd
  PCI: qcom: Fix unbalanced PHY init on probe errors
  mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N
  mtd: cfi_cmdset_0002: Move and rename chip_check/chip_ready/chip_good_for_write
  md/raid0: Ignore RAID0 layout if the second zone has only one device
  powerpc/32: Fix overread/overwrite of thread_struct via ptrace
  Input: bcm5974 - set missing URB_NO_TRANSFER_DMA_MAP urb flag
  ixgbe: fix unexpected VLAN Rx in promisc mode on VF
  ixgbe: fix bcast packets Rx on VF after promisc removal
  nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling
  nfc: st21nfca: fix incorrect validating logic in EVT_TRANSACTION
  ata: libata-transport: fix {dma|pio|xfer}_mode sysfs files
  cifs: return errors during session setup during reconnects
  ALSA: hda/conexant - Fix loopback issue with CX20632
  vringh: Fix loop descriptors check in the indirect cases
  nodemask: Fix return values to be unsigned
  nbd: fix io hung while disconnecting device
  nbd: fix race between nbd_alloc_config() and module removal
  nbd: call genl_unregister_family() first in nbd_cleanup()
  modpost: fix undefined behavior of is_arm_mapping_symbol()
  drm/radeon: fix a possible null pointer dereference
  Revert "net: af_key: add check for pfkey_broadcast in function pfkey_process"
  md: protect md_unregister_thread from reentrancy
  kernfs: Separate kernfs_pr_cont_buf and rename_lock.
  serial: msm_serial: disable interrupts in __msm_console_write()
  staging: rtl8712: fix uninit-value in r871xu_drv_init()
  clocksource/drivers/sp804: Avoid error on multiple instances
  extcon: Modify extcon device to be created after driver data is set
  misc: rtsx: set NULL intfdata when probe fails
  usb: dwc2: gadget: don't reset gadget's driver->bus
  USB: hcd-pci: Fully suspend across freeze/thaw cycle
  drivers: usb: host: Fix deadlock in oxu_bus_suspend()
  drivers: tty: serial: Fix deadlock in sa1100_set_termios()
  USB: host: isp116x: check return value after calling platform_get_resource()
  drivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop()
  tty: Fix a possible resource leak in icom_probe
  tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()
  lkdtm/usercopy: Expand size of "out of frame" object
  iio: dummy: iio_simple_dummy: check the return value of kstrdup()
  drm: imx: fix compiler warning with gcc-12
  net: altera: Fix refcount leak in altera_tse_mdio_create
  net: ipv6: unexport __init-annotated seg6_hmac_init()
  net: xfrm: unexport __init-annotated xfrm4_protocol_init()
  net: mdio: unexport __init-annotated mdio_bus_init()
  SUNRPC: Fix the calculation of xdr->end in xdr_get_next_encode_buffer()
  net/mlx4_en: Fix wrong return value on ioctl EEPROM query failure
  ata: pata_octeon_cf: Fix refcount leak in octeon_cf_probe
  xprtrdma: treat all calls not a bcall when bc_serv is NULL
  video: fbdev: pxa3xx-gcu: release the resources correctly in pxa3xx_gcu_probe/remove()
  m68knommu: fix undefined reference to `_init_sp'
  m68knommu: set ZERO_PAGE() to the allocated zeroed page
  i2c: cadence: Increase timeout per message if necessary
  tracing: Avoid adding tracer option before update_tracer_options
  tracing: Fix sleeping function called from invalid context on RT kernel
  mips: cpc: Fix refcount leak in mips_cpc_default_phys_base
  perf c2c: Fix sorting in percent_rmt_hitm_cmp()
  tcp: tcp_rtx_synack() can be called from process context
  ubi: ubi_create_volume: Fix use-after-free when volume creation failed
  jffs2: fix memory leak in jffs2_do_fill_super
  modpost: fix removing numeric suffixes
  net: dsa: mv88e6xxx: Fix refcount leak in mv88e6xxx_mdios_register
  net: ethernet: mtk_eth_soc: out of bounds read in mtk_hwlro_get_fdir_entry()
  clocksource/drivers/oxnas-rps: Fix irq_of_parse_and_map() return value
  firmware: dmi-sysfs: Fix memory leak in dmi_sysfs_register_handle
  serial: st-asc: Sanitize CSIZE and correct PARENB for CS7
  serial: sh-sci: Don't allow CS5-6
  serial: txx9: Don't allow CS5-6
  serial: digicolor-usart: Don't allow CS5-6
  serial: meson: acquire port->lock in startup()
  rtc: mt6397: check return value after calling platform_get_resource()
  soc: rockchip: Fix refcount leak in rockchip_grf_init
  coresight: cpu-debug: Replace mutex with mutex_trylock on panic notifier
  rpmsg: qcom_smd: Fix irq_of_parse_and_map() return value
  pwm: lp3943: Fix duty calculation in case period was clamped
  USB: storage: karma: fix rio_karma_init return
  usb: usbip: add missing device lock on tweak configuration cmd
  usb: usbip: fix a refcount leak in stub_probe()
  tty: goldfish: Use tty_port_destroy() to destroy port
  staging: greybus: codecs: fix type confusion of list iterator variable
  pcmcia: db1xxx_ss: restrict to MIPS_DB1XXX boards
  netfilter: nf_tables: disallow non-stateful expression in sets earlier
  MIPS: IP27: Remove incorrect `cpu_has_fpu' override
  RDMA/rxe: Generate a completion for unsupported/invalid opcode
  phy: qcom-qmp: fix reset-controller leak on probe errors
  dt-bindings: gpio: altera: correct interrupt-cells
  docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0
  phy: qcom-qmp: fix struct clk leak on probe errors
  arm64: dts: qcom: ipq8074: fix the sleep clock frequency
  gma500: fix an incorrect NULL check on list iterator
  carl9170: tx: fix an incorrect use of list iterator
  ASoC: rt5514: Fix event generation for "DSP Voice Wake Up" control
  rtl818x: Prevent using not initialized queues
  hugetlb: fix huge_pmd_unshare address update
  nodemask.h: fix compilation error with GCC12
  iommu/msm: Fix an incorrect NULL check on list iterator
  um: Fix out-of-bounds read in LDT setup
  um: chan_user: Fix winch_tramp() return value
  mac80211: upgrade passive scan to active scan on DFS channels after beacon rx
  irqchip: irq-xtensa-mx: fix initial IRQ affinity
  irqchip/armada-370-xp: Do not touch Performance Counter Overflow on A375, A38x, A39x
  RDMA/hfi1: Fix potential integer multiplication overflow errors
  md: fix an incorrect NULL check in md_reload_sb
  md: fix an incorrect NULL check in does_sb_need_changing
  drm/bridge: analogix_dp: Grab runtime PM reference for DP-AUX
  drm/nouveau/clk: Fix an incorrect NULL check on list iterator
  drm/amdgpu/cs: make commands with 0 chunks illegal behaviour.
  scsi: ufs: qcom: Add a readl() to make sure ref_clk gets enabled
  scsi: dc395x: Fix a missing check on list iterator
  ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock
  dlm: fix missing lkb refcount handling
  dlm: fix plock invalid read
  ext4: avoid cycles in directory h-tree
  ext4: verify dir block before splitting it
  ext4: fix bug_on in ext4_writepages
  ext4: fix use-after-free in ext4_rename_dir_prepare
  fs-writeback: writeback_sb_inodes:Recalculate 'wrote' according skipped pages
  iwlwifi: mvm: fix assert 1F04 upon reconfig
  wifi: mac80211: fix use-after-free in chanctx code
  perf jevents: Fix event syntax error caused by ExtSel
  perf c2c: Use stdio interface if slang is not supported
  iommu/amd: Increase timeout waiting for GA log enablement
  video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup
  iommu/mediatek: Add list_del in mtk_iommu_remove
  mailbox: forward the hrtimer if not queued and under a lock
  powerpc/fsl_rio: Fix refcount leak in fsl_rio_setup
  powerpc/perf: Fix the threshold compare group constraint for power9
  Input: sparcspkr - fix refcount leak in bbc_beep_probe
  tty: fix deadlock caused by calling printk() under tty_port->lock
  powerpc/4xx/cpm: Fix return value of __setup() handler
  powerpc/idle: Fix return value of __setup() handler
  powerpc/8xx: export 'cpm_setbrg' for modules
  drivers/base/node.c: fix compaction sysfs file leak
  pinctrl: mvebu: Fix irq_of_parse_and_map() return value
  scsi: fcoe: Fix Wstringop-overflow warnings in fcoe_wwn_from_mac()
  mfd: ipaq-micro: Fix error check return value of platform_get_irq()
  ARM: dts: bcm2835-rpi-b: Fix GPIO line names
  ARM: dts: bcm2835-rpi-zero-w: Fix GPIO line name for Wifi/BT
  soc: qcom: smsm: Fix missing of_node_put() in smsm_parse_ipc
  soc: qcom: smp2p: Fix missing of_node_put() in smp2p_parse_ipc
  rxrpc: Don't try to resend the request if we're receiving the reply
  rxrpc: Fix listen() setting the bar too high for the prealloc rings
  ASoC: wm2000: fix missing clk_disable_unprepare() on error in wm2000_anc_transition()
  sctp: read sk->sk_bound_dev_if once in sctp_rcv()
  m68k: math-emu: Fix dependencies of math emulation support
  Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout
  media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init
  media: exynos4-is: Change clk_disable to clk_disable_unprepare
  media: st-delta: Fix PM disable depth imbalance in delta_probe
  regulator: pfuze100: Fix refcount leak in pfuze_parse_regulators_dt
  ASoC: mxs-saif: Fix refcount leak in mxs_saif_probe
  media: uvcvideo: Fix missing check to determine if element is found in list
  drm/msm: return an error pointer in msm_gem_prime_get_sg_table()
  x86/mm: Cleanup the control_va_addr_alignment() __setup handler
  irqchip/aspeed-i2c-ic: Fix irq_of_parse_and_map() return value
  x86: Fix return value of __setup handlers
  drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()
  drm/msm/hdmi: check return value after calling platform_get_resource_byname()
  drm/msm/dsi: fix error checks and return values for DSI xmit functions
  x86/pm: Fix false positive kmemleak report in msr_build_context()
  fsnotify: fix wrong lockdep annotations
  inotify: show inotify mask flags in proc fdinfo
  ath9k_htc: fix potential out of bounds access with invalid rxstatus->rs_keyix
  spi: img-spfi: Fix pm_runtime_get_sync() error checking
  HID: hid-led: fix maximum brightness for Dream Cheeky
  efi: Add missing prototype for efi_capsule_setup_info
  NFC: NULL out the dev->rfkill to prevent UAF
  spi: spi-ti-qspi: Fix return value handling of wait_for_completion_timeout
  drm/mediatek: Fix mtk_cec_mask()
  x86/delay: Fix the wrong asm constraint in delay_loop()
  ASoC: mediatek: Fix missing of_node_put in mt2701_wm8960_machine_probe
  ASoC: mediatek: Fix error handling in mt8173_max98090_dev_probe
  ath9k: fix ar9003_get_eepmisc
  drm: fix EDID struct for old ARM OABI format
  RDMA/hfi1: Prevent panic when SDMA is disabled
  macintosh/via-pmu: Fix build failure when CONFIG_INPUT is disabled
  powerpc/xics: fix refcount leak in icp_opal_init()
  tracing: incorrect isolate_mote_t cast in mm_vmscan_lru_isolate
  PCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store()
  ARM: hisi: Add missing of_node_put after of_find_compatible_node
  ARM: dts: exynos: add atmel,24c128 fallback to Samsung EEPROM
  ARM: versatile: Add missing of_node_put in dcscb_init
  fat: add ratelimit to fat*_ent_bread()
  ARM: OMAP1: clock: Fix UART rate reporting algorithm
  fs: jfs: fix possible NULL pointer dereference in dbFree()
  ARM: dts: ox820: align interrupt controller node name with dtschema
  eth: tg3: silence the GCC 12 array-bounds warning
  rxrpc: Return an error to sendmsg if call failed
  media: exynos4-is: Fix compile warning
  net: phy: micrel: Allow probing without .driver_data
  ASoC: rt5645: Fix errorenous cleanup order
  nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags
  openrisc: start CPU timer early in boot
  rtlwifi: Use pr_warn instead of WARN_ONCE
  ipmi:ssif: Check for NULL msg when handling events and messages
  dma-debug: change allocation mode from GFP_NOWAIT to GFP_ATIOMIC
  s390/preempt: disable __preempt_count_add() optimization for PROFILE_ALL_BRANCHES
  ASoC: dapm: Don't fold register value changes into notifications
  ipv6: Don't send rs packets to the interface of ARPHRD_TUNNEL
  drm/amd/pm: fix the compile warning
  scsi: megaraid: Fix error check return value of register_chrdev()
  media: cx25821: Fix the warning when removing the module
  media: pci: cx23885: Fix the error handling in cx23885_initdev()
  media: venus: hfi: avoid null dereference in deinit
  ath9k: fix QCA9561 PA bias level
  drm/amd/pm: fix double free in si_parse_power_table()
  ALSA: jack: Access input_dev under mutex
  ACPICA: Avoid cache flush inside virtual machines
  ipw2x00: Fix potential NULL dereference in libipw_xmit()
  b43: Fix assigning negative value to unsigned variable
  b43legacy: Fix assigning negative value to unsigned variable
  mwifiex: add mutex lock for call in mwifiex_dfs_chan_sw_work_queue
  drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes
  btrfs: repair super block num_devices automatically
  btrfs: add "0x" prefix for unsupported optional features
  ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
  ptrace/xtensa: Replace PT_SINGLESTEP with TIF_SINGLESTEP
  USB: new quirk for Dell Gen 2 devices
  USB: serial: option: add Quectel BG95 modem
  binfmt_flat: do not stop relocating GOT entries prematurely on riscv
2022-06-30 14:03:54 +00:00
Jason A. Donenfeld
63959c5833 m68k: use fallback for random_get_entropy() instead of zero
commit 0f392c95391f2d708b12971a07edaa7973f9eece upstream.

In the event that random_get_entropy() can't access a cycle counter or
similar, falling back to returning 0 is really not the best we can do.
Instead, at least calling random_get_entropy_fallback() would be
preferable, because that always needs to return _something_, even
falling back to jiffies eventually. It's not as though
random_get_entropy_fallback() is super high precision or guaranteed to
be entropic, but basically anything that's not zero all the time is
better than returning zero all the time.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-25 11:46:38 +02:00
Greg Ungerer
8168018761 m68knommu: fix undefined reference to `_init_sp'
[ Upstream commit a71b9e66fee47c59b3ec34e652b5c23bc6550794 ]

When configuring a nommu classic m68k system enabling the uboot parameter
passing support (CONFIG_UBOOT) will produce the following compile error:

   m68k-linux-ld: arch/m68k/kernel/uboot.o: in function `process_uboot_commandline':
   uboot.c:(.init.text+0x32): undefined reference to `_init_sp'

The logic to support this option is only used on ColdFire based platforms
(in its head.S startup code). So make the selection of this option
depend on building for a ColdFire based platform.

Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 16:53:58 +02:00
Greg Ungerer
bcbca17f63 m68knommu: set ZERO_PAGE() to the allocated zeroed page
[ Upstream commit dc068f46217970d9516f16cd37972a01d50dc055 ]

The non-MMU m68k pagetable ZERO_PAGE() macro is being set to the
somewhat non-sensical value of "virt_to_page(0)". The zeroth page
is not in any way guaranteed to be a page full of "0". So the result
is that ZERO_PAGE() will almost certainly contain random values.

We already allocate a real "empty_zero_page" in the mm setup code shared
between MMU m68k and non-MMU m68k. It is just not hooked up to the
ZERO_PAGE() macro for the non-MMU m68k case.

Fix ZERO_PAGE() to use the allocated "empty_zero_page" pointer.

I am not aware of any specific issues caused by the old code.

Link: https://lore.kernel.org/linux-m68k/2a462b23-5b8e-bbf4-ec7d-778434a3b9d7@google.com/T/#t
Reported-by: Hugh Dickens <hughd@google.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 16:53:58 +02:00
Geert Uytterhoeven
7f1577c4bf m68k: math-emu: Fix dependencies of math emulation support
[ Upstream commit ed6bc6bf0a7d75e80eb1df883c09975ebb74e590 ]

If CONFIG_M54xx=y, CONFIG_MMU=y, and CONFIG_M68KFPU_EMU=y:

    {standard input}:272: Error: invalid instruction for this architecture; needs 68000 or higher (68000 [68ec000, 68hc000, 68hc001, 68008, 68302, 68306, 68307, 68322, 68356], 68010, 68020 [68k, 68ec020], 68030 [68ec030], 68040 [68ec040], 68060 [68ec060], cpu32 [68330, 68331, 68332, 68333, 68334, 68336, 68340, 68341, 68349, 68360], fidoa [fido]) -- statement `sub.b %d1,%d3' ignored
    {standard input}:609: Error: invalid instruction for this architecture; needs 68020 or higher (68020 [68k, 68ec020], 68030 [68ec030], 68040 [68ec040], 68060 [68ec060]) -- statement `bfextu 4(%a1){%d0,#8},%d0' ignored
    {standard input}:752: Error: operands mismatch -- statement `mulu.l 4(%a0),%d3:%d0' ignored
    {standard input}:1155: Error: operands mismatch -- statement `divu.l %d0,%d3:%d7' ignored

The math emulation support code is intended for 68020 and higher, and
uses several instructions or instruction modes not available on coldfire
or 68000.

Originally, the dependency of M68KFPU_EMU on MMU was fine, as MMU
support was only available on 68020 or higher.  But this assumption
was broken by the introduction of MMU support for M547x and M548x.

Drop the dependency on MMU, as the code should work fine on 68020 and up
without MMU (which are not yet supported by Linux, though).
Add dependencies on M68KCLASSIC (to rule out Coldfire) and FPU (kernel
has some type of floating-point support --- be it hardware or software
emulated, to rule out anything below 68020).

Fixes: 1f7034b9616e6f14 ("m68k: allow ColdFire 547x and 548x CPUs to be built with MMU enabled")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/18c34695b7c95107f60ccca82a4ff252f3edf477.1652446117.git.geert@linux-m68k.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 16:53:50 +02:00
Clement Courbet
9c9d8b0a60
lib: optimize cpumask_next_and()
We've measured that we spend ~0.6% of sys cpu time in cpumask_next_and().
It's essentially a joined iteration in search for a non-zero bit, which is
currently implemented as a lookup join (find a nonzero bit on the lhs,
lookup the rhs to see if it's set there).

Implement a direct join (find a nonzero bit on the incrementally built
join).  Also add generic bitmap benchmarks in the new `test_find_bit`
module for new function (see `find_next_and_bit` in [2] and [3] below).

For cpumask_next_and, direct benchmarking shows that it's 1.17x to 14x
faster with a geometric mean of 2.1 on 32 CPUs [1].  No impact on memory
usage.  Note that on Arm, the new pure-C implementation still outperforms
the old one that uses a mix of C and asm (`find_next_bit`) [3].

[1] Approximate benchmark code:

```
  unsigned long src1p[nr_cpumask_longs] = {pattern1};
  unsigned long src2p[nr_cpumask_longs] = {pattern2};
  for (/*a bunch of repetitions*/) {
    for (int n = -1; n <= nr_cpu_ids; ++n) {
      asm volatile("" : "+rm"(src1p)); // prevent any optimization
      asm volatile("" : "+rm"(src2p));
      unsigned long result = cpumask_next_and(n, src1p, src2p);
      asm volatile("" : "+rm"(result));
    }
  }
```

Results:
pattern1    pattern2     time_before/time_after
0x0000ffff  0x0000ffff   1.65
0x0000ffff  0x00005555   2.24
0x0000ffff  0x00001111   2.94
0x0000ffff  0x00000000   14.0
0x00005555  0x0000ffff   1.67
0x00005555  0x00005555   1.71
0x00005555  0x00001111   1.90
0x00005555  0x00000000   6.58
0x00001111  0x0000ffff   1.46
0x00001111  0x00005555   1.49
0x00001111  0x00001111   1.45
0x00001111  0x00000000   3.10
0x00000000  0x0000ffff   1.18
0x00000000  0x00005555   1.18
0x00000000  0x00001111   1.17
0x00000000  0x00000000   1.25
-----------------------------
               geo.mean  2.06

[2] test_find_next_bit, X86 (skylake)

 [ 3913.477422] Start testing find_bit() with random-filled bitmap
 [ 3913.477847] find_next_bit: 160868 cycles, 16484 iterations
 [ 3913.477933] find_next_zero_bit: 169542 cycles, 16285 iterations
 [ 3913.478036] find_last_bit: 201638 cycles, 16483 iterations
 [ 3913.480214] find_first_bit: 4353244 cycles, 16484 iterations
 [ 3913.480216] Start testing find_next_and_bit() with random-filled
 bitmap
 [ 3913.481074] find_next_and_bit: 89604 cycles, 8216 iterations
 [ 3913.481075] Start testing find_bit() with sparse bitmap
 [ 3913.481078] find_next_bit: 2536 cycles, 66 iterations
 [ 3913.481252] find_next_zero_bit: 344404 cycles, 32703 iterations
 [ 3913.481255] find_last_bit: 2006 cycles, 66 iterations
 [ 3913.481265] find_first_bit: 17488 cycles, 66 iterations
 [ 3913.481266] Start testing find_next_and_bit() with sparse bitmap
 [ 3913.481272] find_next_and_bit: 764 cycles, 1 iterations

[3] test_find_next_bit, arm (v7 odroid XU3).

[  267.206928] Start testing find_bit() with random-filled bitmap
[  267.214752] find_next_bit: 4474 cycles, 16419 iterations
[  267.221850] find_next_zero_bit: 5976 cycles, 16350 iterations
[  267.229294] find_last_bit: 4209 cycles, 16419 iterations
[  267.279131] find_first_bit: 1032991 cycles, 16420 iterations
[  267.286265] Start testing find_next_and_bit() with random-filled
bitmap
[  267.302386] find_next_and_bit: 2290 cycles, 8140 iterations
[  267.309422] Start testing find_bit() with sparse bitmap
[  267.316054] find_next_bit: 191 cycles, 66 iterations
[  267.322726] find_next_zero_bit: 8758 cycles, 32703 iterations
[  267.329803] find_last_bit: 84 cycles, 66 iterations
[  267.336169] find_first_bit: 4118 cycles, 66 iterations
[  267.342627] Start testing find_next_and_bit() with sparse bitmap
[  267.356919] find_next_and_bit: 91 cycles, 1 iterations

[courbet@google.com: v6]
  Link: http://lkml.kernel.org/r/20171129095715.23430-1-courbet@google.com
[geert@linux-m68k.org: m68k/bitops: always include <asm-generic/bitops/find.h>]
  Link: http://lkml.kernel.org/r/1512556816-28627-1-git-send-email-geert@linux-m68k.org
Link: http://lkml.kernel.org/r/20171128131334.23491-1-courbet@google.com
Signed-off-by: Clement Courbet <courbet@google.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yury Norov <ynorov@caviumnetworks.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: alk3pInjection <webmaster@raspii.tech>
Signed-off-by: azrim <mirzaspc@gmail.com>
2022-06-10 15:41:42 +07:00
Randy Dunlap
6ec1655832 m68k: set a default value for MEMORY_RESERVE
[ Upstream commit 1aaa557b2db95c9506ed0981bc34505c32d6b62b ]

'make randconfig' can produce a .config file with
"CONFIG_MEMORY_RESERVE=" (no value) since it has no default.
When a subsequent 'make all' is done, kconfig restarts the config
and prompts for a value for MEMORY_RESERVE. This breaks
scripting/automation where there is no interactive user input.

Add a default value for MEMORY_RESERVE. (Any integer value will
work here for kconfig.)

Fixes a kconfig warning:

.config:214:warning: symbol value '' invalid for MEMORY_RESERVE
* Restart config...
Memory reservation (MiB) (MEMORY_RESERVE) [] (NEW)

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") # from beginning of git history
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-26 11:40:35 +01:00
Al Viro
2d6c29df60 m68k: Handle arrivals of multiple signals correctly
[ Upstream commit 4bb0bd81ce5e97092dfda6a106d414b703ec0ee8 ]

When we have several pending signals, have entered with the kernel
with large exception frame *and* have already built at least one
sigframe, regs->stkadj is going to be non-zero and regs->format/sr/pc
are going to be junk - the real values are in shifted exception stack
frame we'd built when putting together the first sigframe.

If that happens, subsequent sigframes are going to be garbage.
Not hard to fix - just need to find the "adjusted" frame first
and look for format/vector/sr/pc in it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/YP2dBIAPTaVvHiZ6@zeniv-ca.linux.org.uk
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-10-17 10:08:34 +02:00
Guenter Roeck
e8bbc24fba m68k: Double cast io functions to unsigned long
[ Upstream commit b1a89856fbf63fffde6a4771d8f1ac21df549e50 ]

m68k builds fail widely with errors such as

arch/m68k/include/asm/raw_io.h:20:19: error:
	cast to pointer from integer of different size
arch/m68k/include/asm/raw_io.h:30:32: error:
	cast to pointer from integer of different size [-Werror=int-to-p

On m68k, io functions are defined as macros. The problem is seen if the
macro parameter variable size differs from the size of a pointer. Cast
the parameter of all io macros to unsigned long before casting it to
a pointer to fix the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210907060729.2391992-1-linux@roeck-us.net
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-10-06 15:05:06 +02:00
Pavel Skripkin
06cb2d648f m68k: emu: Fix invalid free in nfeth_cleanup()
[ Upstream commit 761608f5cf70e8876c2f0e39ca54b516bdcb7c12 ]

In the for loop all nfeth_dev array members should be freed, not only
the first one.  Freeing only the first array member can cause
double-free bugs and memory leaks.

Fixes: 9cd7b148312f ("m68k/atari: ARAnyM - Add support for network access")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Link: https://lore.kernel.org/r/20210705204727.10743-1-paskripkin@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-22 11:45:18 +02:00
Fuqian Huang
d66da05c7b m68k: q40: Fix info-leak in rtc_ioctl
[ Upstream commit 7cf78b6b12fd5550545e4b73b35dca18bd46b44c ]

When the option is RTC_PLL_GET, pll will be copied to userland
via copy_to_user. pll is initialized using mach_get_rtc_pll indirect
call and mach_get_rtc_pll is only assigned with function
q40_get_rtc_pll in arch/m68k/q40/config.c.
In function q40_get_rtc_pll, the field pll_ctrl is not initialized.
This will leak uninitialized stack content to userland.
Fix this by zeroing the uninitialized field.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Link: https://lore.kernel.org/r/20190927121544.7650-1-huangfq.daxian@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:12:26 +02:00
Greg Ungerer
951e12c66e m68knommu: fix overwriting of bits in ColdFire V3 cache control
[ Upstream commit bdee0e793cea10c516ff48bf3ebb4ef1820a116b ]

The Cache Control Register (CACR) of the ColdFire V3 has bits that
control high level caching functions, and also enable/disable the use
of the alternate stack pointer register (the EUSP bit) to provide
separate supervisor and user stack pointer registers. The code as
it is today will blindly clear the EUSP bit on cache actions like
invalidation. So it is broken for this case - and that will result
in failed booting (interrupt entry and exit processing will be
completely hosed).

This only affects ColdFire V3 parts that support the alternate stack
register (like the 5329 for example) - generally speaking new parts do,
older parts don't. It has no impact on ColdFire V3 parts with the single
stack pointer, like the 5307 for example.

Fix the cache bit defines used, so they maintain the EUSP bit when
carrying out cache actions through the CACR register.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-26 10:29:56 +02:00
Finn Thain
06681b8e26 m68k: mac: Fix IOP status/control register writes
[ Upstream commit 931fc82a6aaf4e2e4a5490addaa6a090d78c24a7 ]

When writing values to the IOP status/control register make sure those
values do not have any extraneous bits that will clear interrupt flags.

To place the SCC IOP into bypass mode would be desirable but this is not
achieved by writing IOP_DMAINACTIVE | IOP_RUN | IOP_AUTOINC | IOP_BYPASS
to the control register. Drop this ineffective register write.

Remove the flawed and unused iop_bypass() function. Make use of the
unused iop_stop() function.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Cc: Joshua Thompson <funaho@jurai.org>
Link: https://lore.kernel.org/r/09bcb7359a1719a18b551ee515da3c4c3cf709e6.1590880333.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-21 09:48:03 +02:00
Finn Thain
275ae397e4 m68k: mac: Don't send IOP message until channel is idle
[ Upstream commit aeb445bf2194d83e12e85bf5c65baaf1f093bd8f ]

In the following sequence of calls, iop_do_send() gets called when the
"send" channel is not in the IOP_MSG_IDLE state:

	iop_ism_irq()
		iop_handle_send()
			(msg->handler)()
				iop_send_message()
			iop_do_send()

Avoid this by testing the channel state before calling iop_do_send().

When sending, and iop_send_queue is empty, call iop_do_send() because
the channel is idle. If iop_send_queue is not empty, iop_do_send() will
get called later by iop_handle_send().

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Cc: Joshua Thompson <funaho@jurai.org>
Link: https://lore.kernel.org/r/6d667c39e53865661fa5a48f16829d18ed8abe54.1590880333.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-21 09:48:03 +02:00
Christophe JAILLET
66f3c8e5d3 m68k/PCI: Fix a memory leak in an error handling path
[ Upstream commit c3f4ec050f56eeab7c1f290321f9b762c95bd332 ]

If 'ioremap' fails, we must free 'bridge', as done in other error handling
path bellow.

Fixes: 19cc4c843f40 ("m68k/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-25 15:41:49 +02:00
Finn Thain
5a7acfe428 m68k: mac: Don't call via_flush_cache() on Mac IIfx
[ Upstream commit bcc44f6b74106b31f0b0408b70305a40360d63b7 ]

There is no VIA2 chip on the Mac IIfx, so don't call via_flush_cache().
This avoids a boot crash which appeared in v5.4.

printk: console [ttyS0] enabled
printk: bootconsole [debug0] disabled
printk: bootconsole [debug0] disabled
Calibrating delay loop... 9.61 BogoMIPS (lpj=48064)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
devtmpfs: initialized
random: get_random_u32 called from bucket_table_alloc.isra.27+0x68/0x194 with crng_init=0
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 256 (order: -1, 3072 bytes, linear)
NET: Registered protocol family 16
Data read fault at 0x00000000 in Super Data (pc=0x8a6a)
BAD KERNEL BUSERR
Oops: 00000000
Modules linked in:
PC: [<00008a6a>] via_flush_cache+0x12/0x2c
SR: 2700  SP: 01c1fe3c  a2: 01c24000
d0: 00001119    d1: 0000000c    d2: 00012000    d3: 0000000f
d4: 01c06840    d5: 00033b92    a0: 00000000    a1: 00000000
Process swapper (pid: 1, task=01c24000)
Frame format=B ssw=0755 isc=0200 isb=fff7 daddr=00000000 dobuf=01c1fed0
baddr=00008a6e dibuf=0000004e ver=f
Stack from 01c1fec4:
        01c1fed0 00007d7e 00010080 01c1fedc 0000792e 00000001 01c1fef4 00006b40
        01c80000 00040000 00000006 00000003 01c1ff1c 004a545e 004ff200 00040000
        00000000 00000003 01c06840 00033b92 004a5410 004b6c88 01c1ff84 000021e2
        00000073 00000003 01c06840 00033b92 0038507a 004bb094 004b6ca8 004b6c88
        004b6ca4 004b6c88 000021ae 00020002 00000000 01c0685d 00000000 01c1ffb4
        0049f938 00409c85 01c06840 0045bd40 00000073 00000002 00000002 00000000
Call Trace: [<00007d7e>] mac_cache_card_flush+0x12/0x1c
 [<00010080>] fix_dnrm+0x2/0x18
 [<0000792e>] cache_push+0x46/0x5a
 [<00006b40>] arch_dma_prep_coherent+0x60/0x6e
 [<00040000>] switched_to_dl+0x76/0xd0
 [<004a545e>] dma_atomic_pool_init+0x4e/0x188
 [<00040000>] switched_to_dl+0x76/0xd0
 [<00033b92>] parse_args+0x0/0x370
 [<004a5410>] dma_atomic_pool_init+0x0/0x188
 [<000021e2>] do_one_initcall+0x34/0x1be
 [<00033b92>] parse_args+0x0/0x370
 [<0038507a>] strcpy+0x0/0x1e
 [<000021ae>] do_one_initcall+0x0/0x1be
 [<00020002>] do_proc_dointvec_conv+0x54/0x74
 [<0049f938>] kernel_init_freeable+0x126/0x190
 [<0049f94c>] kernel_init_freeable+0x13a/0x190
 [<004a5410>] dma_atomic_pool_init+0x0/0x188
 [<00041798>] complete+0x0/0x3c
 [<000b9b0c>] kfree+0x0/0x20a
 [<0038df98>] schedule+0x0/0xd0
 [<0038d604>] kernel_init+0x0/0xda
 [<0038d610>] kernel_init+0xc/0xda
 [<0038d604>] kernel_init+0x0/0xda
 [<00002d38>] ret_from_kernel_thread+0xc/0x14
Code: 0000 2079 0048 10da 2279 0048 10c8 d3c8 <1011> 0200 fff7 1280 d1f9 0048 10c8 1010 0000 0008 1080 4e5e 4e75 4e56 0000 2039
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Thanks to Stan Johnson for capturing the console log and running git
bisect.

Git bisect said commit 8e3a68fb55e0 ("dma-mapping: make
dma_atomic_pool_init self-contained") is the first "bad" commit. I don't
know why. Perhaps mach_l2_flush first became reachable with that commit.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-and-tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Cc: Joshua Thompson <funaho@jurai.org>
Link: https://lore.kernel.org/r/b8bbeef197d6b3898e82ed0d231ad08f575a4b34.1589949122.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-20 10:25:13 +02:00
Finn Thain
4127249099 m68k: Call timer_interrupt() with interrupts disabled
[ Upstream commit 1efdd4bd254311498123a15fa0acd565f454da97 ]

Some platforms execute their timer handler with the interrupt priority
level set below 6. That means the handler could be interrupted by another
driver and this could lead to re-entry of the timer core.

Avoid this by use of local_irq_save/restore for timer interrupt dispatch.
This provides mutual exclusion around the timer interrupt flag access
which is needed later in this series for the clocksource conversion.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1811131407120.2697@nanos.tec.linutronix.de
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:46:54 +01:00
Finn Thain
5bd4bd3e35 m68k: mac: Fix VIA timer counter accesses
[ Upstream commit 0ca7ce7db771580433bf24454f7a1542bd326078 ]

This resolves some bugs that affect VIA timer counter accesses.
Avoid lost interrupts caused by reading the counter low byte register.
Make allowance for the fact that the counter will be decremented to
0xFFFF before being reloaded.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:46:27 +01:00
Angelo Dureghello
37aeb6076a m68k: fix command-line parsing when passed from u-boot
[ Upstream commit 381fdd62c38344a771aed06adaf14aae65c47454 ]

This patch fixes command_line array zero-terminated
one byte over the end of the array, causing boot to hang.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-01 09:13:24 +01:00
Finn Thain
1255e28103 m68k: Add -ffreestanding to CFLAGS
commit 28713169d879b67be2ef2f84dcf54905de238294 upstream.

This patch fixes a build failure when using GCC 8.1:

/usr/bin/ld: block/partitions/ldm.o: in function `ldm_parse_tocblock':
block/partitions/ldm.c:153: undefined reference to `strcmp'

This is caused by a new optimization which effectively replaces a
strncmp() call with a strcmp() call. This affects a number of strncmp()
call sites in the kernel.

The entire class of optimizations is avoided with -fno-builtin, which
gets enabled by -ffreestanding. This may avoid possible future build
failures in case new optimizations appear in future compilers.

I haven't done any performance measurements with this patch but I did
count the function calls in a defconfig build. For example, there are now
23 more sprintf() calls and 39 fewer strcpy() calls. The effect on the
other libc functions is smaller.

If this harms performance we can tackle that regression by optimizing
the call sites, ideally using semantic patches. That way, clang and ICC
builds might benfit too.

Cc: stable@vger.kernel.org
Reference: https://marc.info/?l=linux-m68k&m=154514816222244&w=2
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-23 14:35:21 +01:00
Greg Ungerer
e793dc3d97 m68k: fix "bad page state" oops on ColdFire boot
[ Upstream commit ecd60532e060e45c63c57ecf1c8549b1d656d34d ]

Booting a ColdFire m68k core with MMU enabled causes a "bad page state"
oops since commit 1d40a5ea01d5 ("mm: mark pages in use for page tables"):

 BUG: Bad page state in process sh  pfn:01ce2
 page:004fefc8 count:0 mapcount:-1024 mapping:00000000 index:0x0
 flags: 0x0()
 raw: 00000000 00000000 00000000 fffffbff 00000000 00000100 00000200 00000000
 raw: 039c4000
 page dumped because: nonzero mapcount
 Modules linked in:
 CPU: 0 PID: 22 Comm: sh Not tainted 4.17.0-07461-g1d40a5ea01d5 #13

Fix by calling pgtable_page_dtor() in our __pte_free_tlb() code path,
so that the PG_table flag is cleared before we free the pte page.

Note that I had to change the type of pte_free() to be static from
extern. Otherwise you get a lot of warnings like this:

./arch/m68k/include/asm/mcf_pgalloc.h:80:2: warning: ‘pgtable_page_dtor’ is static but used in inline function ‘pte_free’ which is not static
  pgtable_page_dtor(page);
  ^

And making it static is consistent with our use of this in the other
m68k pgalloc definitions of pte_free().

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
CC: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-24 13:09:11 +02:00
Finn Thain
60711b27c5 m68k/mac: Fix SWIM memory resource end address
commit 3e2816c1078eb2b5a3276eb83d4da156b3e2d04f upstream.

The resource size is 0x2000 == end - start + 1.
Therefore end == start + 0x2000 - 1.

Cc: Laurent Vivier <lvivier@redhat.com>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-03 11:24:46 +02:00
Michael Schmitz
da9ad89c72 m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap()
commit 3f90f9ef2dda316d64e420d5d51ba369587ccc55 upstream.

If 020/030 support is enabled, get_io_area() leaves an IO_SIZE gap
between mappings which is added to the vm_struct representing the
mapping.  __ioremap() uses the actual requested size (after alignment),
while __iounmap() is passed the size from the vm_struct.

On 020/030, early termination descriptors are used to set up mappings of
extent 'size', which are validated on unmapping. The unmapped gap of
size IO_SIZE defeats the sanity check of the pmd tables, causing
__iounmap() to loop forever on 030.

On 040/060, unmapping of page table entries does not check for a valid
mapping, so the umapping loop always completes there.

Adjust size to be unmapped by the gap that had been added in the
vm_struct prior.

This fixes the hang in atari_platform_init() reported a long time ago,
and a similar one reported by Finn recently (addressed by removing
ioremap() use from the SWIM driver.

Tested on my Falcon in 030 mode - untested but should work the same on
040/060 (the extra page tables cleared there would never have been set
up anyway).

Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
[geert: Minor commit description improvements]
[geert: This was fixed in 2.4.23, but not in 2.5.x]
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-03 11:24:46 +02:00
Greg Ungerer
6a020bb3c6 m68k: set dma and coherent masks for platform FEC ethernets
[ Upstream commit f61e64310b75733d782e930d1fb404b84699eed6 ]

As of commit 205e1b7f51e4 ("dma-mapping: warn when there is no
coherent_dma_mask") the Freescale FEC driver is issuing the following
warning on driver initialization on ColdFire systems:

WARNING: CPU: 0 PID: 1 at ./include/linux/dma-mapping.h:516 0x40159e20
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc7-dirty #4
Stack from 41833dd8:
        41833dd8 40259c53 40025534 40279e26 00000003 00000000 4004e514 41827000
        400255de 40244e42 00000204 40159e20 00000009 00000000 00000000 4024531d
        40159e20 40244e42 00000204 00000000 00000000 00000000 00000007 00000000
        00000000 40279e26 4028d040 40226576 4003ae88 40279e26 418273f6 41833ef8
        7fffffff 418273f2 41867028 4003c9a2 4180ac6c 00000004 41833f8c 4013e71c
        40279e1c 40279e26 40226c16 4013ced2 40279e26 40279e58 4028d040 00000000
Call Trace:
        [<40025534>] 0x40025534
 [<4004e514>] 0x4004e514
 [<400255de>] 0x400255de
 [<40159e20>] 0x40159e20
 [<40159e20>] 0x40159e20

It is not fatal, the driver and the system continue to function normally.

As per the warning the coherent_dma_mask is not set on this device.
There is nothing special about the DMA memory coherency on this hardware
so we can just set the mask to 32bits in the platform data for the FEC
ethernet devices.

Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-30 07:52:27 +02:00
Arnd Bergmann
305eb32d45 bug.h: work around GCC PR82365 in BUG()
[ Upstream commit 173a3efd3edb2ef6ef07471397c5f542a360e9c1 ]

Looking at functions with large stack frames across all architectures
led me discovering that BUG() suffers from the same problem as
fortify_panic(), which I've added a workaround for already.

In short, variables that go out of scope by calling a noreturn function
or __builtin_unreachable() keep using stack space in functions
afterwards.

A workaround that was identified is to insert an empty assembler
statement just before calling the function that doesn't return.  I'm
adding a macro "barrier_before_unreachable()" to document this, and
insert calls to that in all instances of BUG() that currently suffer
from this problem.

The files that saw the largest change from this had these frame sizes
before, and much less with my patch:

  fs/ext4/inode.c:82:1: warning: the frame size of 1672 bytes is larger than 800 bytes [-Wframe-larger-than=]
  fs/ext4/namei.c:434:1: warning: the frame size of 904 bytes is larger than 800 bytes [-Wframe-larger-than=]
  fs/ext4/super.c:2279:1: warning: the frame size of 1160 bytes is larger than 800 bytes [-Wframe-larger-than=]
  fs/ext4/xattr.c:146:1: warning: the frame size of 1168 bytes is larger than 800 bytes [-Wframe-larger-than=]
  fs/f2fs/inode.c:152:1: warning: the frame size of 1424 bytes is larger than 800 bytes [-Wframe-larger-than=]
  net/netfilter/ipvs/ip_vs_core.c:1195:1: warning: the frame size of 1068 bytes is larger than 800 bytes [-Wframe-larger-than=]
  net/netfilter/ipvs/ip_vs_core.c:395:1: warning: the frame size of 1084 bytes is larger than 800 bytes [-Wframe-larger-than=]
  net/netfilter/ipvs/ip_vs_ftp.c:298:1: warning: the frame size of 928 bytes is larger than 800 bytes [-Wframe-larger-than=]
  net/netfilter/ipvs/ip_vs_ftp.c:418:1: warning: the frame size of 908 bytes is larger than 800 bytes [-Wframe-larger-than=]
  net/netfilter/ipvs/ip_vs_lblcr.c:718:1: warning: the frame size of 960 bytes is larger than 800 bytes [-Wframe-larger-than=]
  drivers/net/xen-netback/netback.c:1500:1: warning: the frame size of 1088 bytes is larger than 800 bytes [-Wframe-larger-than=]

In case of ARC and CRIS, it turns out that the BUG() implementation
actually does return (or at least the compiler thinks it does),
resulting in lots of warnings about uninitialized variable use and
leaving noreturn functions, such as:

  block/cfq-iosched.c: In function 'cfq_async_queue_prio':
  block/cfq-iosched.c:3804:1: error: control reaches end of non-void function [-Werror=return-type]
  include/linux/dmaengine.h: In function 'dma_maxpq':
  include/linux/dmaengine.h:1123:1: error: control reaches end of non-void function [-Werror=return-type]

This makes them call __builtin_trap() instead, which should normally
dump the stack and kill the current process, like some of the other
architectures already do.

I tried adding barrier_before_unreachable() to panic() and
fortify_panic() as well, but that had very little effect, so I'm not
submitting that patch.

Vineet said:

: For ARC, it is double win.
:
: 1. Fixes 3 -Wreturn-type warnings
:
: | ../net/core/ethtool.c:311:1: warning: control reaches end of non-void function
: [-Wreturn-type]
: | ../kernel/sched/core.c:3246:1: warning: control reaches end of non-void function
: [-Wreturn-type]
: | ../include/linux/sunrpc/svc_xprt.h:180:1: warning: control reaches end of
: non-void function [-Wreturn-type]
:
: 2.  bloat-o-meter reports code size improvements as gcc elides the
:    generated code for stack return.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
Link: http://lkml.kernel.org/r/20171219114112.939391-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Vineet Gupta <vgupta@synopsys.com>	[arch/arc]
Tested-by: Vineet Gupta <vgupta@synopsys.com>	[arch/arc]
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christopher Li <sparse@chrisli.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-30 07:52:00 +02:00
Greg Ungerer
30791140de m68k: add missing SOFTIRQENTRY_TEXT linker section
[ Upstream commit 969de0988b77e5a57aac2f7270191a3c50540c52 ]

Commit be7635e7287e ("arch, ftrace: for KASAN put hard/soft IRQ entries
into separate sections") added a new linker section, SOFTIRQENTRY_TEXT,
to the linker scripts for most architectures. It didn't add it to any of
the linker scripts for the m68k architecture. This was not really a problem
because it is only defined if either of CONFIG_FUNCTION_GRAPH_TRACER or
CONFIG_KASAN are enabled - which can never be true for m68k.

However commit 229a71860547 ("irq: Make the irqentry text section
unconditional") means that SOFTIRQENTRY_TEXT is now always defined. So on
m68k we now end up with a separate ELF section for .softirqentry.text
instead of it being part of the .text section. On some m68k targets in some
configurations this can also cause a fatal link error:

  LD      vmlinux
/usr/local/bin/../m68k-uclinux/bin/ld.real: section .softirqentry.text loaded at [0000000010de10c0,0000000010de12dd] overlaps section .rodata loaded at [0000000010de10c0,0000000010e0fd67]

To fix add in the missing SOFTIRQENTRY_TEXT section into the m68k linker
scripts. I noticed that m68k is also missing the IRQENTRY_TEXT section,
so this patch also adds an entry for that too.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-25 11:07:58 +01:00
Greg Ungerer
162cefc554 m68k: fix ColdFire node shift size calculation
[ Upstream commit f55ab8f27548ff3431a6567d400c6757c49fd520 ]

The m68k pg_data_table is a fix size array defined in arch/m68k/mm/init.c.
Index numbers within it are defined based on memory size. But for Coldfire
these don't take into account a non-zero physical RAM base address, and this
causes us to access past the end of this array at system start time.

Change the node shift calculation so that we keep the index inside its range.

Reported-by: Angelo Dureghello <angelo@sysam.it>
Tested-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-10 13:40:39 +01:00
Greg Kroah-Hartman
e2be04c7f9 License cleanup: add SPDX license identifier to uapi header files with a license
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be.  This makes it hard for
compliance tools to determine the correct license.

Update these files with an SPDX license identifier.  The identifier was
chosen based on the license information in the file.

GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.

Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier.  The format
is:
        ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)

SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text.  The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:20:11 +01:00
Greg Kroah-Hartman
6f52b16c5b License cleanup: add SPDX license identifier to uapi header files with no license
Many user space API headers are missing licensing information, which
makes it hard for compliance tools to determine the correct license.

By default are files without license information under the default
license of the kernel, which is GPLV2.  Marking them GPLV2 would exclude
them from being included in non GPLV2 code, which is obviously not
intended. The user space API headers fall under the syscall exception
which is in the kernels COPYING file:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

otherwise syscall usage would not be possible.

Update the files which contain no license information with an SPDX
license identifier.  The chosen identifier is 'GPL-2.0 WITH
Linux-syscall-note' which is the officially assigned identifier for the
Linux syscall exception.  SPDX license identifiers are a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:19:54 +01:00
Greg Kroah-Hartman
b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00
Linus Torvalds
64414e5f98 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu updates from Greg Ungerer:
 "Only two changes. One removes unused code, the other makes local clock
  code arguments consistent with generic clock code"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: remove dead code
  m68k: allow NULL clock for clk_get_rate
2017-09-10 21:07:39 -07:00
Geert Uytterhoeven
4c2b5e0fab m68k: Add braces to __pmd(x) initializer to kill compiler warning
With gcc 4.1.2:

    include/linux/swapops.h: In function ‘swp_entry_to_pmd’:
    include/linux/swapops.h:294: warning: missing braces around initializer
    include/linux/swapops.h:294: warning: (near initialization for ‘(anonymous).pmd’)

Due to a GCC zero initializer bug (#53119), the standard "(pmd_t){ 0 }"
initializer is not accepted by all GCC versions.
In addition, on m68k pmd_t is an array instead of a single value, so we
need "(pmd_t){ { 0 }, }" instead of "(pmd_t){ 0 }".

Based on commit 9157259d16a8 ("mm: add pmd_t initializer __pmd() to
work around a GCC bug.") for sparc32.

Fixes: 616b8371539a ("mm: thp: enable thp migration in generic path")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-09-10 09:55:35 -07:00