Al Viro
fa33be192e
configfs: fix a deadlock in configfs_symlink() ...
commit 351e5d869e5ac10cb40c78b5f2d7dfc816ad4587 upstream.
Configfs abuses symlink(2). Unlike the normal filesystems, it
wants the target resolved at symlink(2) time, like link(2) would've
done. The problem is that ->symlink() is called with the parent
directory locked exclusive, so resolving the target inside the
->symlink() is easily deadlocked.
Short of really ugly games in sys_symlink() itself, all we can
do is to unlock the parent before resolving the target and
relock it after. However, that invalidates the checks done
by the caller of ->symlink(), so we have to
* check that dentry is still where it used to be
(it couldn't have been moved, but it could've been unhashed)
* recheck that it's still negative (somebody else
might've successfully created a symlink with the same name
while we were looking the target up)
* recheck the permissions on the parent directory.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-12 19:15:51 +01:00
9p: avoid attaching writeback_fid on mmap with type PRIVATE
2019-10-17 13:42:10 -07:00
fs/adfs: super: fix use-after-free bug
2019-08-06 18:29:35 +02:00
affs_lookup(): close a race with affs_remove_link()
2018-05-30 07:50:16 +02:00
afs: Fix abort on signal while waiting for call completion
2017-12-20 10:07:25 +01:00
autofs: fix error return in autofs_fill_super()
2019-03-13 14:04:58 -07:00
befs fixes for 4.9-rc1
2016-10-15 12:09:13 -07:00
bfs: add sanity check at bfs_fill_super()
2018-12-01 09:44:19 +01:00
btrfs: block-group: Fix a memory leak due to missing btrfs_put_block_group()
2019-10-29 09:15:25 +01:00
fscache, cachefiles: remove redundant variable 'cache'
2018-12-17 09:38:34 +01:00
ceph: fix use-after-free in __ceph_remove_cap()
2019-11-12 19:15:44 +01:00
cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs
2019-11-10 11:23:21 +01:00
coda: add error handling for fget
2019-08-06 18:29:38 +02:00
configfs: fix a deadlock in configfs_symlink()
2019-11-12 19:15:51 +01:00
Cramfs: fix abad comparison when wrap-arounds occur
2018-11-13 11:17:03 -08:00
fscrypt: don't set policy for a dead directory
2019-07-21 09:05:59 +02:00
debugfs: fix use-after-free on symlink traversal
2019-05-08 07:19:10 +02:00
fs/devpts: always delete dcache dentry-s in dput()
2019-03-23 13:19:47 +01:00
dlm: Don't swamp the CPU with callbacks queued during recovery
2019-02-12 19:44:51 +01:00
eCryptfs: fix a couple type promotion bugs
2019-08-04 09:33:31 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
fs/exofs: fix potential memory leak in mount option parsing
2018-11-27 16:09:38 +01:00
exportfs: do not read dentry after free
2018-12-17 09:38:33 +01:00
ext2: Fix underflow in ext2_max_size()
2019-03-23 13:19:48 +01:00
ext4: fix punch hole for inline_data file systems
2019-10-05 12:30:35 +02:00
f2fs: fix to do sanity check on segment bitmap of LFS curseg
2019-10-05 12:30:11 +02:00
fat: work around race with userspace's read via blockdev while mounting
2019-10-07 18:53:18 +02:00
fscache: fix race between enablement and dropping of object
2018-12-17 09:38:34 +01:00
fuse: truncate pending writes on O_TRUNC
2019-11-06 12:18:15 +01:00
gfs2: Fix lru_count going negative
2019-05-31 06:48:13 -07:00
hfs: do not free node before using
2018-12-17 09:38:35 +01:00
hfsplus: do not free node before using
2018-12-17 09:38:35 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
hugetlb: use same fault hash key for shared and private mappings
2019-05-31 06:48:12 -07:00
isofs: fix timestamps beyond 2027
2017-11-30 08:39:04 +00:00
jbd2: check superblock mapped prior to committing
2019-05-21 18:48:59 +02:00
jffs2: fix use-after-free on symlink traversal
2019-05-08 07:19:09 +02:00
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
2018-08-09 12:18:00 +02:00
kernfs: Replace strncpy with memcpy
2018-12-08 13:05:05 +01:00
lockd: fix access beyond unterminated strings in prints
2018-11-13 11:17:02 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
ncpfs: fix build warning of strncpy
2019-03-13 14:04:52 -07:00
NFSv4: Fix leak of clp->cl_acceptor string
2019-11-06 12:18:12 +01:00
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:05:38 +01:00
nfsd: Fix overflow causing non-working mounts on 1 TB machines
2019-08-04 09:33:36 +02:00
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:50:16 +02:00
fanotify: fix handling of events on child sub-directory
2019-02-06 17:33:30 +01:00
fs: remove the never implemented aio_fsync file operation
2016-10-30 13:09:42 -04:00
fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc()
2019-11-06 12:18:11 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
fs: Replace CURRENT_TIME with current_time() for inode timestamps
2016-09-27 21:06:21 -04:00
orangefs: off by ones in xattr size checks
2018-11-10 07:42:46 -08:00
ovl: filter of trusted xattr results in audit
2019-10-05 12:30:34 +02:00
coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
2019-08-06 18:29:41 +02:00
pstore/ram: Do not treat empty buffers as valid
2019-01-26 09:38:33 +01:00
fs/quota: Fix spectre gadget in do_quotactl
2018-09-09 20:01:26 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
reiserfs: propagate errors from fill_with_dentries() properly
2018-11-27 16:09:38 +01:00
romfs: use different way to generate fsid for BLOCK or MTD
2017-06-17 06:41:56 +02:00
Squashfs: Compute expected length from inode size rather than block length
2018-09-05 09:20:03 +02:00
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
2018-09-05 09:20:10 +02:00
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-12-17 09:38:32 +01:00
fs: Replace CURRENT_TIME with current_time() for inode timestamps
2016-09-27 21:06:21 -04:00
ubifs: Handle re-linking of inodes correctly while recovery
2018-12-29 13:40:16 +01:00
udf: Fix incorrect final NOT_ALLOCATED (hole) extent length
2019-07-21 09:05:57 +02:00
ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
2019-05-25 18:26:56 +02:00
xfs: Correctly invert xfs_buftarg LRU isolation logic
2019-11-06 12:18:27 +01:00
aio: fix spectre gadget in lookup_ioctx
2018-12-21 14:11:31 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
bad_inode: add missing i_op initializers
2017-01-09 08:32:24 +01:00
binfmt_elf: Respect error return from `regset->active'
2018-09-26 08:36:37 +02:00
fs/binfmt_flat.c: make load_flat_shared_library() work
2019-07-10 09:55:38 +02:00
fs/binfmt_misc.c: do not allow offset overflow
2018-06-26 08:08:09 +08:00
exec: load_script: Do not exec truncated interpreter path
2019-11-06 12:18:04 +01:00
blockdev: Fix livelocks on loop device
2019-01-23 08:10:56 +01:00
fs: fix guard_bio_eod to check for real EOD errors
2019-04-05 22:29:08 +02:00
chardev: add additional check for minor range overlap
2019-05-31 06:48:29 -07:00
compat: remove compat_printk()
2016-09-27 21:20:53 -04:00
binfmt_elf: compat: avoid unused function warning
2018-02-25 11:05:55 +01:00
compat_ioctl: pppoe: fix PPPOEIOCSFWD handling
2019-08-11 12:22:17 +02:00
coredump: Ensure proper size of sparse core files
2017-07-05 14:40:26 +02:00
fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
2018-02-28 10:18:33 +01:00
Hang/soft lockup in d_invalidate with simultaneous calls
2019-03-27 14:13:04 +09:00
direct-io: allow direct writes to empty inodes
2019-03-05 17:57:05 +01:00
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-03-13 14:04:58 -07:00
fs/epoll: drop ovflist branch prediction
2019-02-12 19:44:59 +01:00
sched/fair: Don't free p->numa_faults with concurrent readers
2019-08-04 09:33:45 +02:00
fs/fcntl: f_setown, avoid undefined behaviour
2018-01-31 12:55:52 +01:00
fs/file.c: initialize init_files.resize_wait
2019-04-05 22:29:07 +02:00
blkcg, writeback: dead memcgs shouldn't contribute to writeback ownership arbitration
2019-08-04 09:33:20 +02:00
Abort file_remove_privs() for non-reg. files
2019-06-22 08:17:24 +02:00
xfs: evict all inodes involved with log redo item
2017-09-20 08:20:01 +02:00
iomap: fix integer truncation issues in the zeroing and dirtying helpers
2017-09-20 08:19:59 +02:00
mm/hugetlb: introduce ARCH_HAS_GIGANTIC_PAGE
2016-10-07 18:46:29 -07:00
Fix the locking in dcache_readdir() and friends
2019-10-17 13:42:45 -07:00
locking, fs/locks: Add missing file_sem locks
2016-10-18 12:21:28 +02:00
mbcache: initialize entry->e_referenced in mb_cache_entry_create()
2018-02-22 15:43:48 +01:00
mnt: In propgate_umount handle visiting mounts in any order
2017-07-21 07:42:22 +02:00
fs/mpage.c: fix mpage_writepage() for pages with buffers
2017-10-18 09:35:39 +02:00
namei: allow restricted O_CREAT of FIFOs and regular files
2018-12-01 09:44:25 +01:00
mount: Prevent MNT_DETACH from disconnecting locked mounts
2018-11-21 09:26:02 +01:00
nsfs: mark dentry with DCACHE_RCUACCESS
2018-02-17 13:21:15 +01:00
access: avoid the RCU grace period for the temporary subjective credentials
2019-08-04 09:33:43 +02:00
fs: prevent page refcount overflow in pipe_buf_get
2019-06-11 12:22:45 +02:00
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-07-21 07:42:22 +02:00
mnt: Tuck mounts under others instead of creating shadow/side mounts.
2017-03-15 10:02:43 +08:00
tmpfs: clear S_ISGID when setting posix ACLs
2017-01-26 08:24:37 +01:00
fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock
2019-06-11 12:22:49 +02:00
fs/select: add vmalloc fallback for select(2)
2016-10-11 15:06:30 -07:00
seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char
2016-10-07 18:46:30 -07:00
fs: prevent page refcount overflow in pipe_buf_get
2019-06-11 12:22:45 +02:00
ufs: restore maintaining ->i_blocks
2017-06-14 15:06:01 +02:00
fs: don't scan the inode cache before SB_BORN is set
2019-02-06 17:33:29 +01:00
timerfd: Protect the might cancel mechanism proper
2017-05-08 07:47:54 +02:00
userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
2019-09-06 10:19:37 +02:00
Merge remote-tracking branch 'jk/vfs' into work.misc
2016-10-08 11:06:08 -04:00
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-10-10 08:53:22 +02:00
fa33be192e