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Jan Kara 5838d4442b fanotify: fix double free of pending permission events 
Commit 85816794240b ("fanotify: Fix use after free for permission
events") introduced a double free issue for permission events which are
pending in group's notification queue while group is being destroyed.
These events are freed from fanotify_handle_event() but they are not
removed from groups notification queue and thus they get freed again
from fsnotify_flush_notify().

Fix the problem by removing permission events from notification queue
before freeing them if we skip processing access response.  Also expand
comments in fanotify_release() to explain group shutdown in detail.

Fixes: 85816794240b9659e66e4d9b0df7c6e814e5f603
Signed-off-by: Jan Kara <jack@suse.cz>
Reported-by: Douglas Leeder <douglas.leeder@sophos.com>
Tested-by: Douglas Leeder <douglas.leeder@sophos.com>
Reported-by: Heinrich Schuchard <xypron.glpk@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-06 18:01:12 -07:00
..
9p
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
adfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
affs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
afs
AFS: Correctly assemble the client UUID
2014-07-29 10:14:36 -07:00
autofs4
autofs4: fix false positive compile error
2014-07-03 09:21:53 -07:00
befs
fs/befs: kernel-doc fixes
2014-06-06 16:08:09 -07:00
bfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
btrfs
Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new changes
2014-07-28 10:03:00 +02:00
cachefiles
fs/cachefiles: replace kerror by pr_err
2014-06-06 16:08:14 -07:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2014-06-12 23:06:23 -07:00
cifs
sched: Allow wait_on_bit_action() functions to support a timeout
2014-07-16 15:10:41 +02:00
coda
coda: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:16 -07:00
configfs
fs/configfs: use pr_fmt
2014-06-04 16:53:53 -07:00
cramfs
Major changes for 3.14 include support for the newly added ZERO_RANGE
2014-04-04 15:39:39 -07:00
debugfs
fs: debugfs: remove trailing whitespace
2014-07-09 16:58:21 -07:00
devpts
fs/devpts/inode.c: convert printk to pr_foo()
2014-06-06 16:08:14 -07:00
dlm
dlm: keep listening connection alive with sctp mode
2014-06-12 10:26:14 -05:00
ecryptfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
efivarfs
fs/efivarfs/super.c: use static const for dentry_operations
2014-06-04 16:54:14 -07:00
efs
fs/efs: convert printk(KERN_DEBUG to pr_debug
2014-06-04 16:54:21 -07:00
exofs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
exportfs
fs/exportfs/expfs.c: kernel-doc warning fixes
2014-06-04 16:54:14 -07:00
ext2
->splice_write() via ->write_iter()
2014-06-12 00:18:51 -04:00
ext3
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
ext4
ext4: fix ext4_discard_allocated_blocks() if we can't allocate the pa struct
2014-07-30 22:17:17 -04:00
f2fs
f2fs: use for_each_set_bit to simplify the code
2014-08-04 13:20:53 -07:00
fat
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
freevxfs
Major changes for 3.14 include support for the newly added ZERO_RANGE
2014-04-04 15:39:39 -07:00
fscache
fs/fscache: make ctl_table static
2014-08-06 18:01:12 -07:00
fuse
fuse: add FUSE_NO_OPEN_SUPPORT flag to INIT
2014-07-22 16:37:43 +02:00
gfs2
Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new changes
2014-07-28 10:03:00 +02:00
hfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
hfsplus
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
hostfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
hpfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
hppfs
…
hugetlbfs
fs/hugetlbfs/inode.c: remove null test before kfree
2014-06-04 16:54:11 -07:00
isofs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2014-04-07 17:59:17 -07:00
jbd
fs/jbd/revoke.c: replace shift loop by ilog2
2014-05-21 10:26:13 +02:00
jbd2
sched: Remove proliferation of wait_on_bit() action functions
2014-07-16 15:10:39 +02:00
jffs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
jfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
kernfs
Merge 3.16-rc6 into driver-core-next
2014-07-21 10:07:25 -07:00
lockd
fs: lockd: Use ktime_get_ns()
2014-07-23 15:01:44 -07:00
logfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
minix
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
ncpfs
fs/ncpfs/getopt.c: replace simple_strtoul by kstrtoul
2014-06-04 16:54:21 -07:00
nfs
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2014-08-06 08:06:39 -07:00
nfs_common
…
nfsd
NFSD: Fix crash encoding lock reply on 32-bit
2014-07-23 10:31:56 -04:00
nilfs2
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
nls
…
notify
fanotify: fix double free of pending permission events
2014-08-06 18:01:12 -07:00
ntfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
ocfs2
ocfs2/dlm: do not purge lockres that is queued for assert master
2014-06-23 16:47:45 -07:00
omfs
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
openpromfs
fs: push sync_filesystem() down to the file system's remount_fs()
2014-03-13 10:14:33 -04:00
proc
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2014-08-06 08:06:39 -07:00
pstore
fs/pstore: logging clean-up
2014-06-06 16:08:13 -07:00
qnx4
fs: push sync_filesystem() down to the file system's remount_fs()
2014-03-13 10:14:33 -04:00
qnx6
fs: push sync_filesystem() down to the file system's remount_fs()
2014-03-13 10:14:33 -04:00
quota
quota: missing lock in dqcache_shrink_scan()
2014-07-15 22:36:18 +02:00
ramfs
->splice_write() via ->write_iter()
2014-06-12 00:18:51 -04:00
reiserfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
romfs
switch simple generic_file_aio_read() users to ->read_iter()
2014-05-06 17:37:55 -04:00
squashfs
fs/squashfs/squashfs.h: replace pr_warning by pr_warn
2014-06-04 16:53:52 -07:00
sysfs
kernfs: move the last knowledge of sysfs out from kernfs
2014-06-03 08:11:18 -07:00
sysv
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
ubifs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
udf
udf: switch to ->write_iter()
2014-05-06 17:39:36 -04:00
ufs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
xfs
xfs: null unused quota inodes when quota is on
2014-07-15 07:28:41 +10:00
aio.c
Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2014-08-04 10:09:27 -07:00
anon_inodes.c
vfs: Allocate anon_inode_inode in anon_inode_init()
2014-03-27 09:52:54 -07:00
attr.c
fs,userns: Change inode_capable to capable_wrt_inode_uidgid
2014-06-10 13:57:22 -07:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
Merge branch 'x86/vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
2014-06-05 08:05:29 -07:00
binfmt_em86.c
…
binfmt_flat.c
fs/binfmt_flat.c: make old_reloc() static
2014-06-04 16:54:21 -07:00
binfmt_misc.c
binfmt_misc: add missing 'break' statement
2014-04-03 16:21:16 -07:00
binfmt_script.c
…
binfmt_som.c
…
block_dev.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
buffer.c
sched: Remove proliferation of wait_on_bit() action functions
2014-07-16 15:10:39 +02:00
char_dev.c
…
compat_binfmt_elf.c
binfmt_elf: add ELF_HWCAP2 to compat auxv entries
2014-03-04 08:05:21 +00:00
compat_ioctl.c
Bluetooth: Move HCI socket definitions into its own header file
2014-07-11 13:53:04 +03:00
compat.c
locks: rename file-private locks to "open file description locks"
2014-04-22 08:23:58 -04:00
coredump.c
coredump: fix the setting of PF_DUMPCORE
2014-07-23 15:10:54 -07:00
dcache.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
dcookies.c
…
direct-io.c
direct-io: fix AIO regression
2014-08-01 02:35:51 -04:00
drop_caches.c
fs: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:16 -07:00
eventfd.c
…
eventpoll.c
epoll: fix use-after-free in eventpoll_release_file
2014-06-16 17:21:59 -10:00
exec.c
seccomp: implement SECCOMP_FILTER_FLAG_TSYNC
2014-07-18 12:13:40 -07:00
fcntl.c
locks: rename file-private locks to "open file description locks"
2014-04-22 08:23:58 -04:00
fhandle.c
…
file_table.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
file.c
fs/file.c: don't open-code kvfree()
2014-05-06 17:31:10 -04:00
filesystems.c
sys_sysfs: Add CONFIG_SYSFS_SYSCALL
2014-04-03 16:21:05 -07:00
fs_struct.c
…
fs-writeback.c
sched: Remove proliferation of wait_on_bit() action functions
2014-07-16 15:10:39 +02:00
inode.c
sched: Remove proliferation of wait_on_bit() action functions
2014-07-16 15:10:39 +02:00
internal.h
…
ioctl.c
…
Kconfig
…
Kconfig.binfmt
…
libfs.c
fs/libfs.c: add generic data flush to fsync
2014-06-04 16:53:55 -07:00
locks.c
locks: purge fl_owner_t from fs/locks.c
2014-07-13 21:39:07 -04:00
Makefile
block: move ioprio.c from fs/ to block/
2014-05-19 11:02:18 -06:00
mbcache.c
fs/mbcache: replace __builtin_log2() with ilog2()
2014-06-25 22:08:29 -04:00
mount.h
reduce m_start() cost...
2014-04-01 23:19:09 -04:00
mpage.c
fs/block_dev.c: add bdev_read_page() and bdev_write_page()
2014-06-04 16:54:02 -07:00
namei.c
fs: umount on symlink leaks mnt count
2014-07-24 06:18:12 -04:00
namespace.c
VFS: Make delayed_free() call free_vfsmnt()
2014-04-01 23:19:18 -04:00
no-block.c
…
open.c
vfs: fix check for fallocate on active swapfile
2014-08-01 02:36:04 -04:00
pipe.c
new helper: copy_page_from_iter()
2014-05-06 17:39:42 -04:00
pnode.c
smarter propagate_mnt()
2014-04-01 23:19:08 -04:00
pnode.h
smarter propagate_mnt()
2014-04-01 23:19:08 -04:00
posix_acl.c
posix_acl: handle NULL ACL in posix_acl_equiv_mode
2014-05-06 13:58:42 -04:00
proc_namespace.c
reduce m_start() cost...
2014-04-01 23:19:09 -04:00
read_write.c
switch simple generic_file_aio_read() users to ->read_iter()
2014-05-06 17:37:55 -04:00
readdir.c
fanotify: create FAN_ACCESS event for readdir
2014-06-04 16:53:52 -07:00
select.c
…
seq_file.c
fs/seq_file: fallback to vmalloc allocation
2014-07-03 09:21:54 -07:00
signalfd.c
…
splice.c
Merge commit '9f12600fe425bc28f0ccba034a77783c09c15af4' into for-linus
2014-06-12 00:28:09 -04:00
stack.c
…
stat.c
…
statfs.c
…
super.c
fs/superblock: avoid locking counting inodes and dentries before reclaiming them
2014-06-04 16:54:11 -07:00
sync.c
Revert "writeback: do not sync data dirtied after sync start"
2014-02-22 02:02:28 +01:00
timerfd.c
timerfd: Use ktime_mono_to_real()
2014-07-23 10:18:02 -07:00
utimes.c
…
xattr.c
simple_xattr: permit 0-size extended attributes
2014-07-23 15:10:55 -07:00