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Mike Rapoport 5a18b64e3f userfaultfd: non-cooperative: flush event_wqh at release time 
There may still be threads waiting on event_wqh at the time the
userfault file descriptor is closed.  Flush the events wait-queue to
prevent waiting threads from hanging.

Link: http://lkml.kernel.org/r/1501398127-30419-1-git-send-email-rppt@linux.vnet.ibm.com
Fixes: 9cd75c3cd4c3d ("userfaultfd: non-cooperative: add ability to report
non-PF events from uffd descriptor")
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:13 -07:00
..
9p
9p: Implement show_options
2017-07-11 06:08:58 -04:00
adfs
…
affs
affs: Implement show_options
2017-07-11 06:06:17 -04:00
afs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
autofs4
Fix up over-eager 'wait_queue_t' renaming
2017-07-10 11:40:19 -07:00
befs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
bfs
bfs: fix sanity checks for empty files
2017-07-12 16:26:00 -07:00
btrfs
Merge branch 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
2017-07-28 12:26:59 -07:00
cachefiles
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
ceph
ceph: fix race in concurrent readdir
2017-07-17 14:54:59 +02:00
cifs
Add wait_for_random_bytes() and get_random_*_wait() functions so that
2017-07-15 12:44:02 -07:00
coda
fs: implement vfs_iter_write using do_iter_write
2017-06-29 17:49:23 -04:00
configfs
configfs: Introduce config_item_get_unless_zero()
2017-06-12 13:20:20 +02:00
cramfs
…
crypto
The first major feature for ext4 this merge window is the largedir
2017-07-09 09:31:22 -07:00
debugfs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
devpts
…
dlm
…
ecryptfs
ecryptfs: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
efivarfs
VFS: Kill off s_options and helpers
2017-07-11 06:09:21 -04:00
efs
…
exofs
mm: drop "wait" parameter from write_one_page()
2017-07-05 18:44:22 -04:00
exportfs
…
ext2
ext2: preserve i_mode if ext2_set_acl() fails
2017-07-18 11:23:56 +02:00
ext4
The first major feature for ext4 this merge window is the largedir
2017-07-09 09:31:22 -07:00
f2fs
f2fs: avoid cpu lockup
2017-07-17 19:23:18 -07:00
fat
…
freevxfs
…
fscache
…
fuse
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2017-05-20 16:12:30 -07:00
gfs2
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
hfs
fs: semove set but not checked AOP_FLAG_UNINTERRUPTIBLE flag
2017-05-08 17:15:14 -07:00
hfsplus
hfsplus: Don't clear SGID when inheriting ACLs
2017-07-18 18:23:39 +02:00
hostfs
…
hpfs
…
hugetlbfs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
isofs
isofs: Fix off-by-one in 'session' mount option parsing
2017-07-18 12:33:16 +02:00
jbd2
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
jffs2
jffs2: fix spelling mistake: "requestied" -> "requested"
2017-04-19 11:35:55 -07:00
jfs
JFS fixes for 4.13
2017-07-25 08:51:57 -07:00
kernfs
…
lockd
sunrpc: mark all struct svc_version instances as const
2017-07-13 15:58:03 -04:00
minix
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:50:54 -07:00
ncpfs
mm: per-cgroup memory reclaim stats
2017-07-06 16:24:35 -07:00
nfs
More NFS client bugfixes for 4.13
2017-07-28 14:44:56 -07:00
nfs_common
…
nfsd
nfsd: Fix a memory scribble in the callback channel
2017-07-17 13:15:06 -04:00
nilfs2
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 13:08:04 -07:00
nls
…
notify
dentry name snapshots
2017-07-07 20:09:10 -04:00
ntfs
ntfs: Use ERR_CAST() to avoid cross-structure cast
2017-05-28 10:11:48 -07:00
ocfs2
ocfs2: constify attribute_group structures
2017-07-06 16:24:30 -07:00
omfs
omfs: Implement show_options
2017-07-06 03:31:46 -04:00
openpromfs
…
orangefs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
overlayfs
ovl: check for bad and whiteout index on lookup
2017-07-20 11:08:21 +02:00
proc
Now that IPC and other changes have landed, enable manual markings for
2017-07-19 08:55:18 -07:00
pstore
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
qnx4
…
qnx6
…
quota
quota: add get_inode_usage callback to transfer multi-inode charges
2017-06-22 11:46:48 -04:00
ramfs
ramfs: Implement show_options
2017-07-06 03:31:46 -04:00
reiserfs
reiserfs: preserve i_mode if __reiserfs_set_acl() fails
2017-07-18 11:24:08 +02:00
romfs
…
squashfs
…
sysfs
…
sysv
mm: drop "wait" parameter from write_one_page()
2017-07-05 18:44:22 -04:00
tracefs
VFS: Don't use save/replace_mount_options if not using generic_show_options
2017-07-06 03:31:46 -04:00
ubifs
ubifs: Set double hash cookie also for RENAME_EXCHANGE
2017-07-14 22:50:57 +02:00
udf
udf: Convert udf_disk_stamp_to_time() to use mktime64()
2017-06-14 11:21:02 +02:00
ufs
Writeback error handling fixes (pile #1)
2017-07-07 18:39:15 -07:00
xfs
xfs: fix multi-AG deadlock in xfs_bunmapi
2017-07-26 08:20:03 -07:00
aio.c
fs: add O_DIRECT and aio support for sending down write life time hints
2017-06-27 12:05:36 -06:00
anon_inodes.c
…
attr.c
…
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
binfmt_elf: safely increment argv pointers
2017-07-10 16:32:36 -07:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: Use %u to format u32
2017-07-16 09:24:05 -07:00
binfmt_misc.c
fs: constify tree_descr arrays passed to simple_fill_super()
2017-04-26 23:54:06 -04:00
binfmt_script.c
…
block_dev.c
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
buffer.c
fs/buffer.c: make bh_lru_install() more efficient
2017-07-10 16:32:30 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
Merge branch 'work.__copy_in_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:15:02 -07:00
compat.c
fs/compat.c: trim unused includes
2017-04-17 12:52:27 -04:00
coredump.c
…
dax.c
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
dcache.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
dcookies.c
…
direct-io.c
fs: add O_DIRECT and aio support for sending down write life time hints
2017-06-27 12:05:36 -06:00
drop_caches.c
…
eventfd.c
There has been a fair amount of activity in the docs tree this time
2017-07-03 21:13:25 -07:00
eventpoll.c
kcmp: fs/epoll: wrap kcmp code with CONFIG_CHECKPOINT_RESTORE
2017-07-12 16:26:01 -07:00
exec.c
exec: Limit arg stack to at most 75% of _STK_LIM
2017-07-07 20:05:08 -07:00
fcntl.c
vfs: fix flock compat thinko
2017-07-07 13:48:18 -07:00
fhandle.c
fhandle: move compat syscalls from compat.c
2017-04-17 12:52:26 -04:00
file_table.c
fs: new infrastructure for writeback error handling and reporting
2017-07-06 07:02:25 -04:00
file.c
fs/file.c: replace alloc_fdmem() with kvmalloc() alternative
2017-07-06 16:24:30 -07:00
filesystems.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
fs_pin.c
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
fs_struct.c
…
fs-writeback.c
writeback: rework wb_[dec|inc]_stat family of functions
2017-07-12 16:26:05 -07:00
inode.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:50:54 -07:00
internal.h
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-05-09 09:12:53 -07:00
ioctl.c
…
iomap.c
Changes since last update:
2017-07-14 22:57:32 -07:00
Kconfig
fs/Kconfig: kill CONFIG_PERCPU_RWSEM some more
2017-07-12 16:26:00 -07:00
Kconfig.binfmt
…
libfs.c
fs: convert __generic_file_fsync to use errseq_t based reporting
2017-07-06 07:02:29 -04:00
locks.c
fs/locks: pass kernel struct flock to fcntl_getlk/setlk
2017-05-27 06:07:19 -04:00
Makefile
…
mbcache.c
ext4: xattr inode deduplication
2017-06-22 11:44:55 -04:00
mount.h
Now that IPC and other changes have landed, enable manual markings for
2017-07-19 08:55:18 -07:00
mpage.c
There has been a fair amount of activity in the docs tree this time
2017-07-03 21:13:25 -07:00
namei.c
Now that IPC and other changes have landed, enable manual markings for
2017-07-19 08:55:18 -07:00
namespace.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
no-block.c
…
nsfs.c
VFS: Provide empty name qstr
2017-07-06 03:27:09 -04:00
open.c
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
pipe.c
VFS: Provide empty name qstr
2017-07-06 03:27:09 -04:00
pnode.c
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-05-23 08:41:17 -05:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-07 21:48:15 -07:00
readdir.c
readdir: move compat syscalls from compat.c
2017-04-17 12:52:24 -04:00
select.c
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-06 20:57:13 -07:00
seq_file.c
mm: introduce kv[mz]alloc helpers
2017-05-08 17:15:12 -07:00
signalfd.c
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
splice.c
fs: implement vfs_iter_write using do_iter_write
2017-06-29 17:49:23 -04:00
stack.c
…
stat.c
ufs: restore maintaining ->i_blocks
2017-06-09 16:28:01 -04:00
statfs.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:50:54 -07:00
super.c
VFS: Kill off s_options and helpers
2017-07-11 06:09:21 -04:00
sync.c
fs: remove call_fsync helper function
2017-07-05 18:44:23 -04:00
timerfd.c
timerfd: Use get_itimerspec64() and put_itimerspec64()
2017-06-30 04:14:38 -04:00
userfaultfd.c
userfaultfd: non-cooperative: flush event_wqh at release time
2017-08-02 17:16:13 -07:00
utimes.c
utimes: move compat syscalls from compat.c
2017-04-17 12:52:23 -04:00
xattr.c
treewide: use kv[mz]alloc* rather than opencoded variants
2017-05-08 17:15:13 -07:00