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Kees Cook 6c22e4aea4 pstore/ram: Avoid NULL deref in ftrace merging failure path 
[ Upstream commit 8665569e97dd52920713b95675409648986b5b0d ]

Given corruption in the ftrace records, it might be possible to allocate
tmp_prz without assigning prz to it, but still marking it as needing to
be freed, which would cause at least a NULL dereference.

smatch warnings:
fs/pstore/ram.c:340 ramoops_pstore_read() error: we previously assumed 'prz' could be null (see line 255)

https://lists.01.org/pipermail/kbuild-all/2018-December/055528.html

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 2fbea82bbb89 ("pstore: Merge per-CPU ftrace records into one")
Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-17 20:38:34 +01:00
..
9p
9p: avoid attaching writeback_fid on mmap with type PRIVATE
2019-10-11 18:18:38 +02:00
adfs
fs/adfs: super: fix use-after-free bug
2019-08-06 19:05:21 +02:00
affs
affs_lookup(): close a race with affs_remove_link()
2018-05-30 07:51:47 +02:00
afs
afs: Fix directory permissions check
2018-07-08 15:30:51 +02:00
autofs4
autofs: fix a leak in autofs_expire_indirect()
2019-12-17 20:37:24 +01:00
befs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bfs
bfs: add sanity check at bfs_fill_super()
2018-12-01 09:42:51 +01:00
btrfs
btrfs: only track ref_heads in delayed_ref_updates
2019-12-05 15:37:25 +01:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-12-17 09:28:53 +01:00
ceph
ceph: return -EINVAL if given fsc mount option on kernel w/o support
2019-12-05 15:37:06 +01:00
cifs
cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs
2019-11-10 11:25:19 +01:00
coda
coda: add error handling for fget
2019-08-06 19:05:23 +02:00
configfs
configfs: fix a deadlock in configfs_symlink()
2019-11-12 19:18:18 +01:00
cramfs
Cramfs: fix abad comparison when wrap-arounds occur
2018-11-13 11:15:12 -08:00
crypto
fscrypt: clean up some BUG_ON()s in block encryption/decryption
2019-07-31 07:28:22 +02:00
debugfs
debugfs: fix use-after-free on symlink traversal
2019-05-08 07:20:49 +02:00
devpts
fs/devpts: always delete dcache dentry-s in dput()
2019-03-23 14:35:21 +01:00
dlm
dlm: fix invalid cluster name warning
2019-12-17 20:38:33 +01:00
ecryptfs
ecryptfs_lookup_interpose(): lower_dentry->d_parent is not stable either
2019-11-20 17:59:32 +01:00
efivarfs
…
efs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exofs
exofs_mount(): fix leaks on failure exits
2019-12-05 15:37:28 +01:00
exportfs
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-12-17 20:37:26 +01:00
ext2
ext2: Fix underflow in ext2_max_size()
2019-03-23 14:35:23 +01:00
ext4
ext4: add more paranoia checking in ext4_expand_extra_isize handling
2019-12-05 15:38:19 +01:00
f2fs
f2fs: fix to allow node segment for GC by ioctl path
2019-12-17 20:38:12 +01:00
fat
fat: work around race with userspace's read via blockdev while mounting
2019-10-07 18:55:12 +02:00
freevxfs
…
fscache
fscache: fix race between enablement and dropping of object
2018-12-17 09:28:53 +01:00
fuse
fuse: use READ_ONCE on congestion_threshold and max_background
2019-11-20 18:00:52 +01:00
gfs2
gfs2: take jdata unstuff into account in do_grow
2019-12-05 15:37:32 +01:00
hfs
fs/hfs/extent.c: fix array out of bounds read of array extent
2019-12-01 09:13:57 +01:00
hfsplus
hfsplus: update timestamps on truncate()
2019-12-01 09:13:56 +01:00
hostfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hpfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hugetlbfs
hugetlb: use same fault hash key for shared and private mappings
2019-05-31 06:47:12 -07:00
isofs
isofs: reject hardware sector size > 2048 bytes
2018-10-03 17:00:57 -07:00
jbd2
jbd2: introduce jbd2_inode dirty range scoping
2019-07-31 07:28:47 +02:00
jffs2
jffs2: fix use-after-free on symlink traversal
2019-05-08 07:20:49 +02:00
jfs
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
2018-08-09 12:16:39 +02:00
kernfs
kernfs: Fix range checks in kernfs_get_target_path
2019-11-20 18:00:02 +01:00
lockd
lockd: fix decoding of TEST results
2019-12-17 20:38:15 +01:00
minix
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ncpfs
staging: ncpfs: memory corruption in ncp_read_kernel()
2018-03-28 18:24:43 +02:00
nfs
NFSv4.x: fix lock recovery during delegation recall
2019-11-24 08:23:12 +01:00
nfs_common
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:39:08 +01:00
nfsd
nfsd: fix a warning in __cld_pipe_upcall()
2019-12-17 20:38:18 +01:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +02:00
nls
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
notify
fanotify: fix handling of events on child sub-directory
2019-02-06 17:31:37 +01:00
ntfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ocfs2
ocfs2: clear journal dirty flag after shutdown journal
2019-12-05 15:37:51 +01:00
omfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
openpromfs
…
orangefs
orangefs: rate limit the client not running info message
2019-11-24 08:23:30 +01:00
overlayfs
ovl: filter of trusted xattr results in audit
2019-10-05 12:48:09 +02:00
proc
proc/vmcore: Fix i386 build error of missing copy_oldmem_page_encrypted()
2019-11-24 08:23:23 +01:00
pstore
pstore/ram: Avoid NULL deref in ftrace merging failure path
2019-12-17 20:38:34 +01:00
qnx4
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
qnx6
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
quota
quota: fix a problem about transfer quota
2019-07-21 09:04:28 +02:00
ramfs
mm: make pagevec_lookup() update index
2017-09-06 17:27:26 -07:00
reiserfs
reiserfs: propagate errors from fill_with_dentries() properly
2018-11-27 16:10:46 +01:00
romfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-09-05 09:26:32 +02:00
sysfs
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
2018-09-05 09:26:41 +02:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-12-17 09:28:48 +01:00
tracefs
…
ubifs
ubifs: Correctly use tnc_next() in search_dh_cookie()
2019-09-19 09:08:06 +02:00
udf
udf: Fix incorrect final NOT_ALLOCATED (hole) extent length
2019-07-21 09:04:30 +02:00
ufs
ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
2019-05-25 18:25:36 +02:00
xfs
xfs: Fix bulkstat compat ioctls on x32 userspace.
2019-12-05 15:37:33 +01:00
aio.c
aio: fix spectre gadget in lookup_ioctx
2018-12-21 14:13:04 +01:00
anon_inodes.c
…
attr.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bad_inode.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
binfmt_aout.c
fs: fix kernel_read prototype
2017-09-04 19:05:15 -04:00
binfmt_elf_fdpic.c
Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 18:13:32 -07:00
binfmt_elf.c
binfmt_elf: Do not move brk for INTERP-less ET_EXEC
2019-10-05 12:48:06 +02:00
binfmt_em86.c
…
binfmt_flat.c
fs/binfmt_flat.c: make load_flat_shared_library() work
2019-07-03 13:15:59 +02:00
binfmt_misc.c
fs/binfmt_misc.c: do not allow offset overflow
2018-06-26 08:06:33 +08:00
binfmt_script.c
exec: load_script: Do not exec truncated interpreter path
2019-11-06 12:42:59 +01:00
block_dev.c
block: fix the return errno for direct IO
2019-04-17 08:37:53 +02:00
buffer.c
fs: fix guard_bio_eod to check for real EOD errors
2019-04-05 22:31:28 +02:00
char_dev.c
chardev: add additional check for minor range overlap
2019-05-31 06:47:31 -07:00
compat_binfmt_elf.c
…
compat_ioctl.c
media: dvb: fix compat ioctl translation
2019-11-20 17:59:57 +01:00
compat.c
…
coredump.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dax.c
fs/dax.c: release PMD lock even when there is no PMD support in DAX
2018-04-26 11:02:14 +02:00
dcache.c
fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
2019-02-06 17:31:34 +01:00
dcookies.c
…
direct-io.c
iomap: report collisions between directio and buffered writes to userspace
2019-04-27 09:35:41 +02:00
drop_caches.c
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-03-13 14:03:18 -07:00
eventfd.c
…
eventpoll.c
fs/epoll: drop ovflist branch prediction
2019-02-12 19:46:10 +01:00
exec.c
exit/exec: Seperate mm_release()
2019-12-05 15:38:25 +01:00
fcntl.c
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
fhandle.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
file_table.c
fput: Don't reinvent the wheel but use existing llist API
2017-08-28 00:50:23 -04:00
file.c
fs/file.c: initialize init_files.resize_wait
2019-04-05 22:31:28 +02:00
filesystems.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fs_pin.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fs_struct.c
…
fs-writeback.c
cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead
2019-11-12 19:18:47 +01:00
inode.c
Abort file_remove_privs() for non-reg. files
2019-06-22 08:16:19 +02:00
internal.h
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2017-09-13 09:11:44 -07:00
ioctl.c
vfs: swap names of {do,vfs}_clone_file_range()
2018-11-10 07:48:33 -08:00
iomap.c
iomap: sub-block dio needs to zeroout beyond EOF
2019-12-17 20:38:00 +01:00
Kconfig
…
Kconfig.binfmt
…
libfs.c
Fix the locking in dcache_readdir() and friends
2019-10-17 13:43:52 -07:00
locks.c
fs/lock: skip lock owner pid translation in case we are in init_pid_ns
2018-10-03 17:00:53 -07:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mbcache.c
mbcache: initialize entry->e_referenced in mb_cache_entry_create()
2018-02-22 15:42:25 +01:00
mount.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mpage.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
namei.c
namei: allow restricted O_CREAT of FIFOs and regular files
2018-12-01 09:42:59 +01:00
namespace.c
mount: Prevent MNT_DETACH from disconnecting locked mounts
2018-11-21 09:24:14 +01:00
no-block.c
…
nsfs.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
open.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-07-31 07:28:58 +02:00
pipe.c
fs: prevent page refcount overflow in pipe_buf_get
2019-05-04 09:15:18 +02:00
pnode.c
…
pnode.h
…
posix_acl.c
…
proc_namespace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
read_write.c
vfs: avoid problematic remapping requests into partial EOF block
2019-12-01 09:13:51 +01:00
readdir.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
select.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
seq_file.c
seq_file: fix incomplete reset on read from zero offset
2018-02-22 15:42:28 +01:00
signalfd.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
splice.c
fs: prevent page refcount overflow in pipe_buf_get
2019-05-04 09:15:18 +02:00
stack.c
…
stat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-11 18:18:48 +02:00
super.c
fs: don't scan the inode cache before SB_BORN is set
2018-05-30 07:51:47 +02:00
sync.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
timerfd.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
userfaultfd.c
userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
2019-08-29 08:26:43 +02:00
utimes.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-10-10 08:54:27 +02:00