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Eric Biggers f226fdd855 signalfd: use wake_up_pollfree() 
commit 9537bae0da1f8d1e2361ab6d0479e8af7824e160 upstream.

wake_up_poll() uses nr_exclusive=1, so it's not guaranteed to wake up
all exclusive waiters.  Yet, POLLFREE *must* wake up all waiters.  epoll
and aio poll are fortunately not affected by this, but it's very
fragile.  Thus, the new function wake_up_pollfree() has been introduced.

Convert signalfd to use wake_up_pollfree().

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: d80e731ecab4 ("epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:18:07 +01:00
..
9p
9P: Cast to loff_t before multiplying
2020-11-05 11:08:53 +01:00
adfs
fs/adfs: super: fix use-after-free bug
2019-08-06 19:06:49 +02:00
affs
fs/affs: release old buffer head on error path
2021-03-04 09:39:55 +01:00
afs
afs: Fix an IS_ERR() vs NULL check
2021-06-30 08:48:14 -04:00
autofs
autofs: fix a leak in autofs_expire_indirect()
2019-12-13 08:51:01 +01:00
befs
…
bfs
bfs: add sanity check at bfs_fill_super()
2018-12-01 09:37:27 +01:00
btrfs
btrfs: check-integrity: fix a warning on write caching disabled disk
2021-12-08 08:50:11 +01:00
cachefiles
cachefiles: Handle readpage error correctly
2020-11-05 11:08:54 +01:00
ceph
ceph: lockdep annotations for try_nonblocking_invalidate
2021-09-26 13:39:48 +02:00
cifs
cifs: fix incorrect check for null pointer in header_assemble
2021-10-06 15:31:10 +02:00
coda
coda: add error handling for fget
2019-08-06 19:06:51 +02:00
configfs
configfs: fix memleak in configfs_release_bin_file
2021-07-20 16:15:57 +02:00
cramfs
Cramfs: fix abad comparison when wrap-arounds occur
2018-11-13 11:08:55 -08:00
crypto
fscrypt: add fscrypt_symlink_getattr() for computing st_size
2021-09-22 11:47:56 +02:00
debugfs
debugfs: fix use-after-free on symlink traversal
2019-05-08 07:21:48 +02:00
devpts
fs/devpts: always delete dcache dentry-s in dput()
2019-03-23 20:09:59 +01:00
dlm
fs: dlm: fix memory leak when fenced
2021-07-20 16:15:46 +02:00
ecryptfs
Revert "ecryptfs: replace BUG_ON with error handling code"
2021-05-26 11:48:34 +02:00
efivarfs
efivarfs: revert "fix memory leak in efivarfs_create()"
2020-12-02 08:48:12 +01:00
efs
…
exofs
exofs_mount(): fix leaks on failure exits
2019-12-05 09:20:32 +01:00
exportfs
exportfs: fix 'passing zero to ERR_PTR()' warning
2020-01-27 14:50:02 +01:00
ext2
ext2: fix sleeping in atomic bugs on error
2021-10-09 14:11:03 +02:00
ext4
ext4: fix lazy initialization next schedule time computation in more granular unit
2021-11-26 11:36:18 +01:00
f2fs
f2fs: should use GFP_NOFS for directory inodes
2021-11-26 11:36:17 +01:00
fat
fat: don't allow to mount if the FAT length == 0
2020-06-22 09:05:08 +02:00
freevxfs
…
fscache
fscache: Fix cookie key hashing
2021-09-22 11:48:02 +02:00
fuse
fuse: release pipe buf after last use
2021-12-01 09:27:44 +01:00
gfs2
gfs2: Fix length of holes reported at end-of-file
2021-12-08 08:50:11 +01:00
hfs
hfs: add lock nesting notation to hfs_find_init
2021-07-31 08:22:38 +02:00
hfsplus
hfsplus: prevent corruption in shrinking truncate
2021-05-22 10:59:45 +02:00
hostfs
…
hpfs
hpfs: remove unnecessary checks on the value of r when assigning error code
2018-08-25 12:42:33 -07:00
hugetlbfs
hugetlbfs: hugetlb_fault_mutex_hash() cleanup
2021-06-03 08:38:12 +02:00
isofs
isofs: Fix out of bound access for corrupted isofs image
2021-11-12 14:40:50 +01:00
jbd2
jbd2: abort journal if free a async write error metadata buffer
2020-09-03 11:24:24 +02:00
jffs2
jffs2: check the validity of dstlen in jffs2_zlib_compress()
2021-05-22 10:59:21 +02:00
jfs
JFS: fix memleak in jfs_mount
2021-11-26 11:36:12 +01:00
kernfs
kernfs: fix ino wrap-around detection
2019-12-13 08:52:43 +01:00
lockd
lockd: don't use interval-based rebinding over TCP
2020-12-30 11:25:59 +01:00
minix
fs/minix: remove expected error message in block_to_path()
2020-08-21 11:05:38 +02:00
nfs
NFSv42: Fix pagecache invalidation after COPY/CLONE
2021-12-08 08:50:11 +01:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-30 11:26:02 +01:00
nfsd
NFSD: Keep existing listeners on portlist error
2021-10-27 09:53:12 +02:00
nilfs2
nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
2021-09-26 13:39:49 +02:00
nls
…
notify
fanotify: fix ignore mask logic for events on child and on dir
2020-06-30 23:17:00 -04:00
ntfs
ntfs: fix validity check for file name attribute
2021-07-20 16:15:39 +02:00
ocfs2
ocfs2: fix data corruption on truncate
2021-11-26 11:35:57 +01:00
omfs
…
openpromfs
…
orangefs
fs: orangefs: fix error return code of orangefs_revalidate_lookup()
2021-11-26 11:36:14 +01:00
overlayfs
ovl: fix missing negative dentry check in ovl_rename()
2021-10-13 10:10:50 +02:00
proc
proc/vmcore: fix clearing user buffer by properly using clear_user()
2021-12-01 09:27:39 +01:00
pstore
pstore: Fix typo in compression option name
2021-03-04 09:39:54 +01:00
qnx4
qnx4: work around gcc false positive warning bug
2021-10-06 15:31:20 +02:00
qnx6
…
quota
quota: correct error number in free_dqentry()
2021-11-26 11:36:03 +01:00
ramfs
ramfs: fix nommu mmap with gaps in the page cache
2020-10-30 10:38:21 +01:00
reiserfs
reiserfs: check directory items on read from disk
2021-08-12 13:19:44 +02:00
romfs
romfs: fix uninitialized memory leak in romfs_dev_read()
2020-08-26 10:30:59 +02:00
squashfs
squashfs: fix divide error in calculate_skip()
2021-05-22 10:59:45 +02:00
sysfs
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2021-03-07 12:19:01 +01:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-12-17 09:24:30 +01:00
tracefs
tracefs: Have new files inherit the ownership of their parent
2021-12-14 10:18:06 +01:00
ubifs
ubifs: report correct st_size for encrypted symlinks
2021-09-22 11:47:56 +02:00
udf
udf: Fix crash after seekdir
2021-11-26 11:36:23 +01:00
ufs
fs/ufs: avoid potential u32 multiplication overflow
2020-08-21 11:05:38 +02:00
xfs
xfs: Fix assert failure in xfs_setattr_size()
2021-03-07 12:18:55 +01:00
aio.c
aio: fix async fsync creds
2020-06-22 09:05:01 +02:00
anon_inodes.c
…
attr.c
…
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
elf: don't use MAP_FIXED_NOREPLACE for elf interpreter mappings
2021-10-06 15:31:24 +02:00
binfmt_em86.c
…
binfmt_flat.c
fs/binfmt_flat.c: make load_flat_shared_library() work
2019-07-03 13:14:44 +02:00
binfmt_misc.c
binfmt_misc: fix possible deadlock in bm_register_write
2021-03-17 16:43:51 +01:00
binfmt_script.c
exec: load_script: Do not exec truncated interpreter path
2019-11-06 13:05:37 +01:00
block_dev.c
block: reexpand iov_iter after read/write
2021-05-22 10:59:49 +02:00
buffer.c
fs: Don't invalidate page buffers in block_write_full_page()
2020-11-05 11:08:46 +01:00
char_dev.c
chardev: Avoid potential use-after-free in 'chrdev_open()'
2020-01-14 20:06:57 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP
2020-01-09 10:19:07 +01:00
compat.c
…
coredump.c
coredump: fix crash when umh is disabled
2020-05-14 07:57:21 +02:00
d_path.c
…
dax.c
dax: pass NOWAIT flag to iomap_apply
2020-03-05 16:42:12 +01:00
dcache.c
fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
2020-11-05 11:08:35 +01:00
dcookies.c
…
direct-io.c
fs: direct-io: fix missing sdio->boundary
2021-04-14 08:22:32 +02:00
drop_caches.c
fs: avoid softlockups in s_inodes iterators
2020-01-12 12:17:20 +01:00
eventfd.c
eventfd: track eventfd_signal() recursion depth
2020-02-11 04:34:08 -08:00
eventpoll.c
ep_create_wakeup_source(): dentry name can change under you...
2020-10-07 08:00:09 +02:00
exec.c
vfs: check fd has read access in kernel_read_file_from_fd()
2021-10-27 09:53:13 +02:00
fcntl.c
fcntl: fix potential deadlock for &fasync_struct.fa_lock
2021-09-22 11:47:50 +02:00
fhandle.c
…
file_table.c
fs: add fget_many() and fput_many()
2021-12-08 08:50:13 +01:00
file.c
fget: check that the fd still exists after getting a ref to it
2021-12-08 08:50:13 +01:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-17 10:48:51 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
writeback: fix obtain a reference to a freeing memcg css
2021-07-20 16:15:52 +02:00
inode.c
futex: Fix inode life-time issue
2020-03-25 08:06:14 +01:00
internal.h
acct_on(): don't mess with freeze protection
2019-05-31 06:46:05 -07:00
ioctl.c
vfs: fix FIGETBSZ ioctl on an overlayfs file
2018-11-21 09:19:14 +01:00
iomap.c
iomap: fix sub-page uptodate handling
2021-05-22 10:59:50 +02:00
Kconfig
…
Kconfig.binfmt
…
libfs.c
libfs: fix error cast of negative value in simple_attr_write()
2020-11-24 13:27:23 +01:00
locks.c
locks: print unsigned ino in /proc/locks
2020-01-09 10:19:00 +01:00
Makefile
…
mbcache.c
…
mount.h
…
mpage.c
…
namei.c
namei: only return -ECHILD from follow_dotdot_rcu()
2020-03-05 16:42:20 +01:00
namespace.c
fs: warn about impending deprecation of mandatory locks
2021-08-26 08:36:49 -04:00
no-block.c
…
nsfs.c
dcache: sort the freeing-without-RCU-delay mess for good.
2019-05-25 18:23:26 +02:00
open.c
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:14:21 +01:00
pipe.c
pipe: increase minimum default pipe size to 2 pages
2021-08-12 13:19:43 +02:00
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-05-02 17:26:01 +02:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
vfs: avoid problematic remapping requests into partial EOF block
2019-12-01 09:17:04 +01:00
readdir.c
readdir: make sure to verify directory entry for legacy interfaces too
2021-04-28 13:16:50 +02:00
select.c
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
2021-03-24 11:07:37 +01:00
seq_file.c
seq_file: disallow extremely large seq buffer allocations
2021-07-20 16:16:16 +02:00
signalfd.c
signalfd: use wake_up_pollfree()
2021-12-14 10:18:07 +01:00
splice.c
splice: only read in as much information as there is pipe buffer space
2019-12-17 20:35:43 +01:00
stack.c
…
stat.c
…
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-11 18:21:39 +02:00
super.c
vfs: remove lockdep bogosity in __sb_start_write
2020-11-24 13:27:20 +01:00
sync.c
…
timerfd.c
…
userfaultfd.c
userfaultfd: prevent concurrent API initialization
2021-09-22 11:48:02 +02:00
utimes.c
…
xattr.c
xattr: break delegations in {set,remove}xattr
2020-08-11 15:32:34 +02:00