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msm-4.14/fs
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Thomas Betker 157078f64b Revert "jffs2: Fix lock acquisition order bug in jffs2_write_begin" 
This reverts commit 5ffd3412ae55
("jffs2: Fix lock acquisition order bug in jffs2_write_begin").

The commit modified jffs2_write_begin() to remove a deadlock with
jffs2_garbage_collect_live(), but this introduced new deadlocks found
by multiple users. page_lock() actually has to be called before
mutex_lock(&c->alloc_sem) or mutex_lock(&f->sem) because
jffs2_write_end() and jffs2_readpage() are called with the page locked,
and they acquire c->alloc_sem and f->sem, resp.

In other words, the lock order in jffs2_write_begin() was correct, and
it is the jffs2_garbage_collect_live() path that has to be changed.

Revert the commit to get rid of the new deadlocks, and to clear the way
for a better fix of the original deadlock.

Reported-by: Deng Chao <deng.chao1@zte.com.cn>
Reported-by: Ming Liu <liu.ming50@gmail.com>
Reported-by: wangzaiwei <wangzaiwei@top-vision.cn>
Signed-off-by: Thomas Betker <thomas.betker@rohde-schwarz.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@vger.kernel.org
2016-02-25 11:11:25 +00:00
..
9p
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
adfs
fs/adfs/adfs.h: tidy up comments
2016-01-20 17:09:18 -08:00
affs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
afs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
autofs4
switch ->get_link() to delayed_call, kill ->put_link()
2015-12-30 13:01:03 -05:00
befs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
bfs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
btrfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
cachefiles
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2016-01-24 12:34:13 -08:00
cifs
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
2016-01-24 12:31:12 -08:00
coda
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
configfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
cramfs
don't put symlink bodies in pagecache into highmem
2015-12-08 22:41:36 -05:00
debugfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
devpts
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
dlm
[regression] fix braino in fs/dlm/user.c
2016-01-21 17:45:15 -05:00
ecryptfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
efivarfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
efs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
exofs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
exportfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
ext2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
ext4
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
f2fs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
fat
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
freevxfs
don't put symlink bodies in pagecache into highmem
2015-12-08 22:41:36 -05:00
fscache
FS-Cache: Handle a write to the page immediately beyond the EOF marker
2015-11-11 02:11:02 -05:00
fuse
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
gfs2
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
hfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
hfsplus
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
hostfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
hpfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
hugetlbfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
isofs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
jbd2
fs: use block_device name vsprintf helper
2016-01-06 13:03:18 -05:00
jffs2
Revert "jffs2: Fix lock acquisition order bug in jffs2_write_begin"
2016-02-25 11:11:25 +00:00
jfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
kernfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
lockd
lockd: constify nlmsvc_binding structure
2016-01-07 10:10:50 -05:00
logfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
minix
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
ncpfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
nfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
nfs_common
…
nfsd
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
nilfs2
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
nls
…
notify
fsnotify: destroy marks with call_srcu instead of dedicated thread
2016-01-14 16:00:49 -08:00
ntfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
ocfs2
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
omfs
…
openpromfs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
overlayfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
proc
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
pstore
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
qnx4
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
qnx6
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
quota
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
ramfs
don't put symlink bodies in pagecache into highmem
2015-12-08 22:41:36 -05:00
reiserfs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
romfs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
squashfs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
sysfs
platform/chrome: Branch for v4.4
2015-11-13 21:53:18 -08:00
sysv
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
tracefs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
ubifs
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
udf
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
ufs
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
xfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
aio.c
…
anon_inodes.c
…
attr.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
bad_inode.c
fs/bad_inode.c: is_bad_inode can be boolean
2015-12-06 21:17:14 -05:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
libnvdimm for 4.4:
2015-11-10 12:07:22 -08:00
binfmt_elf.c
ELF: Also pass any interpreter's file header to `arch_check_elf'
2016-01-20 00:39:20 +01:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
binfmt_script.c
…
block_dev.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
buffer.c
fs: use block_device name vsprintf helper
2016-01-06 13:03:18 -05:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-12 17:11:47 -08:00
compat.c
saner calling conventions for copy_mount_options()
2016-01-04 10:28:32 -05:00
coredump.c
fs/coredump: prevent "" / "." / ".." core path components
2016-01-20 17:09:18 -08:00
dax.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
dcache.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
dcookies.c
…
direct-io.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
drop_caches.c
…
eventfd.c
Documentation: filesystem: Fix typo in fs/eventfd.c
2015-12-08 14:52:03 +01:00
eventpoll.c
epoll: add EPOLLEXCLUSIVE flag
2016-01-20 17:09:18 -08:00
exec.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
fcntl.c
fcntl: allow to set O_DIRECT flag on pipe
2016-01-09 02:55:37 -05:00
fhandle.c
…
file_table.c
…
file.c
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
filesystems.c
find_filesystem(): simplify comparison
2016-01-19 12:02:23 -05:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
cgroup, memcg, writeback: drop spurious rcu locking around mem_cgroup_css_from_page()
2016-01-15 17:56:32 -08:00
inode.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-01-23 12:24:56 -08:00
internal.h
Merge branch 'for-linus' into work.misc
2016-01-08 21:20:11 -05:00
ioctl.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
Kconfig
dax: re-enable dax pmd mappings
2016-01-15 17:56:32 -08:00
Kconfig.binfmt
…
libfs.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
locks.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
Makefile
…
mbcache.c
…
mount.h
…
mpage.c
mm, fs: introduce mapping_gfp_constraint()
2015-11-06 17:50:42 -08:00
namei.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
namespace.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
no-block.c
…
nsfs.c
…
open.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
pipe.c
pipe: limit the per-user amount of pages allocated in pipes
2016-01-19 19:25:21 -05:00
pnode.c
…
pnode.h
…
posix_acl.c
xattr handlers: Simplify list operation
2015-12-13 19:46:12 -05:00
proc_namespace.c
vfs: show_vfsstat: remove redundant initialization and check of error code
2015-12-06 21:17:16 -05:00
read_write.c
vfs: abort dedupe loop if fatal signals are pending
2016-01-22 20:29:55 -05:00
readdir.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
select.c
poll: plug an unused argument to do_poll
2016-01-06 08:26:52 -05:00
seq_file.c
fs, seqfile: always allow oom killer
2015-11-06 17:50:42 -08:00
signalfd.c
…
splice.c
fs: __generic_file_splice_read retry lookup on AOP_TRUNCATED_PAGE
2016-01-09 02:55:35 -05:00
stack.c
…
stat.c
fs/stat.c: drop the last new_valid_dev check
2016-01-16 11:17:23 -08:00
statfs.c
…
super.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2016-01-14 17:04:19 -08:00
sync.c
fs/sync.c: make sync_file_range(2) use WB_SYNC_NONE writeback
2015-11-06 17:50:42 -08:00
timerfd.c
…
userfaultfd.c
…
utimes.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
xattr.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00