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linux/fs
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Al Viro ddb595dfe4 cachefiles: fix the race between cachefiles_bury_object() and rmdir(2) 
commit 169b803397 upstream.

the victim might've been rmdir'ed just before the lock_rename();
unlike the normal callers, we do not look the source up after the
parents are locked - we know it beforehand and just recheck that it's
still the child of what used to be its parent.  Unfortunately,
the check is too weak - we don't spot a dead directory since its
->d_parent is unchanged, dentry is positive, etc.  So we sail all
the way to ->rename(), with hosting filesystems _not_ expecting
to be asked renaming an rmdir'ed subdirectory.

The fix is easy, fortunately - the lock on parent is sufficient for
making IS_DEADDIR() on child safe.

Cc: stable@vger.kernel.org
Fixes: 9ae326a690 (CacheFiles: A cache that backs onto a mounted filesystem)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-10 07:48:34 -08:00
..
9p
fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
2018-09-09 19:55:55 +02:00
adfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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 autofs_sbi() does not check super block type
2018-09-19 22:43:48 +02:00
befs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
btrfs
btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf
2018-11-04 14:52:45 +01:00
cachefiles
cachefiles: fix the race between cachefiles_bury_object() and rmdir(2)
2018-11-10 07:48:34 -08:00
ceph
ceph: fix dentry leak in splice_dentry()
2018-08-24 13:09:07 +02:00
cifs
cifs: Use ULL suffix for 64-bit constant
2018-11-04 14:52:43 +01:00
coda
coda: fix 'kernel memory exposure attempt' in fsync
2017-11-24 08:37:05 +01:00
configfs
configfs: fix registered group removal
2018-09-26 08:38:10 +02:00
cramfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crypto
fscrypt: use unbound workqueue for decryption
2018-08-03 07:50:32 +02:00
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
devpts: resolve devpts bind-mounts
2018-07-17 11:39:26 +02:00
dlm
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ecryptfs
eCryptfs: don't pass up plaintext names when using filename encryption
2018-06-21 04:02:42 +09:00
efivarfs
VFS: Kill off s_options and helpers
2017-07-11 06:09:21 -04:00
efs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exofs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
exportfs
Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-03-03 11:38:56 -08:00
ext2
dax: change bdev_dax_supported() to support boolean returns
2018-07-11 16:29:22 +02:00
ext4
ext4: show test_dummy_encryption mount option in /proc/mounts
2018-09-29 03:06:06 -07:00
f2fs
f2fs: fix invalid memory access
2018-10-13 09:27:29 +02:00
fat
fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
2018-11-04 14:52:47 +01:00
freevxfs
freevxfs: update Kconfig information
2016-06-13 10:20:39 +02:00
fscache
fscache: Allow cancelled operations to be enqueued
2018-09-05 09:26:29 +02:00
fuse
fuse: Add missed unlock_page() to fuse_readpages_fill()
2018-09-05 09:26:38 +02:00
gfs2
gfs2: Don't reject a supposedly full bitmap if we have blocks reserved
2018-09-26 08:38:01 +02:00
hfs
hfs: prevent crash on exit from failed search
2018-09-15 09:45:26 +02:00
hfsplus
hfsplus: fix NULL dereference in hfsplus_lookup()
2018-09-15 09:45:27 +02:00
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
hugetlbfs: fix bug in pgoff overflow checking
2018-04-19 08:56:21 +02:00
isofs
isofs: reject hardware sector size > 2048 bytes
2018-10-03 17:00:57 -07:00
jbd2
jbd2: don't mark block as modified if the handle is out of credits
2018-07-11 16:29:16 +02:00
jffs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +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 regression in kernfs_fop_write caused by wrong type
2018-02-16 20:22:59 +01:00
lockd
race of lockd inetaddr notifiers vs nlmsvc_rqst change
2018-02-03 17:39:08 +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
NFSv4.1 fix infinite loop on I/O.
2018-09-26 08:38:09 +02:00
nfs_common
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:39:08 +01:00
nfsd
vfs: swap names of {do,vfs}_clone_file_range()
2018-11-10 07:48:33 -08:00
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
fsnotify: fix ignore mask logic in fsnotify()
2018-11-10 07:48:34 -08:00
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: fix crash in ocfs2_duplicate_clusters_by_page()
2018-11-04 14:52:41 +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
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
orangefs
orangefs: report attributes_mask and attributes for statx
2018-06-26 08:06:33 +08:00
overlayfs
vfs: swap names of {do,vfs}_clone_file_range()
2018-11-10 07:48:33 -08:00
proc
proc: restrict kernel stack dumps to root
2018-10-10 08:54:28 +02:00
pstore
pstore: Fix incorrect persistent ram buffer mapping
2018-09-26 08:38:05 +02:00
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
fs/quota: Fix spectre gadget in do_quotactl
2018-09-09 19:56:02 +02:00
ramfs
mm: make pagevec_lookup() update index
2017-09-06 17:27:26 -07:00
reiserfs
reiserfs: change j_timestamp type to time64_t
2018-09-15 09:45:27 +02:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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: Check for name being NULL while mounting
2018-10-13 09:27:29 +02:00
udf
udf: Detect incorrect directory size
2018-07-03 11:25:03 +02:00
ufs
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +02:00
xfs
xfs: truncate transaction does not modify the inobt
2018-11-10 07:48:34 -08:00
aio.c
fix io_destroy()/aio_complete() race
2018-06-05 11:41:54 +02:00
anon_inodes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
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: Respect error return from `regset->active'
2018-09-26 08:38:09 +02:00
binfmt_em86.c
fs/binfmt_em86.c: fix incompatible pointer type
2016-08-02 19:35:15 -04:00
binfmt_flat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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: kill the onstack interp[BINPRM_BUF_SIZE] array
2017-10-03 17:54:25 -07:00
block_dev.c
blkdev: __blkdev_direct_IO_simple: fix leak in error case
2018-08-03 07:50:42 +02:00
buffer.c
fs: guard_bio_eod() needs to consider partitions
2017-11-30 08:40:45 +00:00
char_dev.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat_binfmt_elf.c
fs/binfmt: Convert obsolete cputime type to nsecs
2017-02-01 09:13:51 +01:00
compat_ioctl.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat.c
fs/compat.c: trim unused includes
2017-04-17 12:52:27 -04:00
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
dcache: account external names as indirectly reclaimable memory
2018-10-18 09:16:25 +02:00
dcookies.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
direct-io.c
direct-io: Fix sleep in atomic due to sync AIO
2018-03-08 22:41:06 -08:00
drop_caches.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
eventfd.c
Merge tag 'docs-4.13' of git://git.lwn.net/linux
2017-07-03 21:13:25 -07:00
eventpoll.c
fs/epoll: use faster rb_first_cached()
2017-09-08 18:26:49 -07:00
exec.c
exec: avoid gcc-8 warning for get_task_comm
2018-03-03 10:24:21 +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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>
2017-03-02 08:42:35 +01:00
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-16 10:10:25 +02:00
inode.c
Fix up non-directory creation in SGID directories
2018-07-17 11:39:27 +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: complete partial direct I/O writes synchronously
2018-10-03 17:00:53 -07:00
Kconfig
fs/Kconfig: kill CONFIG_PERCPU_RWSEM some more
2017-07-12 16:26:00 -07:00
Kconfig.binfmt
docs: fix locations of several documents that got moved
2016-10-24 08:12:35 -02:00
libfs.c
fs: convert __generic_file_fsync to use errseq_t based reporting
2017-07-06 07:02:29 -04:00
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
getname_kernel() needs to make sure that ->name != ->iname in long case
2018-04-19 08:56:19 +02:00
namespace.c
Revert "vfs: fix freeze protection in mnt_want_write_file() for overlayfs"
2018-10-20 09:48:52 +02:00
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
ovl: don't allow writing ioctl on lower layer
2017-09-05 12:53:12 +02:00
pipe.c
pipe: fix off-by-one error when checking buffer limits
2018-02-16 20:23:05 +01:00
pnode.c
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-05-23 08:41:17 -05:00
pnode.h
mnt: Tuck mounts under others instead of creating shadow/side mounts.
2017-02-04 00:01:06 +13:00
posix_acl.c
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
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: swap names of {do,vfs}_clone_file_range()
2018-11-10 07:48:33 -08:00
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: move kernel_write to fs/read_write.c
2017-09-04 19:05:15 -04:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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: remove uffd flags from vma->vm_flags if UFFD_EVENT_FORK fails
2018-08-06 16:20:49 +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