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c59a8f13f36b51f2100111121b39c6d15eca124d
linux/fs
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alex chen c59a8f13f3 ocfs2: subsystem.su_mutex is required while accessing the item->ci_parent 
commit 853bc26a7e upstream.

The subsystem.su_mutex is required while accessing the item->ci_parent,
otherwise, NULL pointer dereference to the item->ci_parent will be
triggered in the following situation:

add node                     delete node
sys_write
 vfs_write
  configfs_write_file
   o2nm_node_store
    o2nm_node_local_write
                             do_rmdir
                              vfs_rmdir
                               configfs_rmdir
                                mutex_lock(&subsys->su_mutex);
                                unlink_obj
                                 item->ci_group = NULL;
                                 item->ci_parent = NULL;
	 to_o2nm_cluster_from_node
	  node->nd_item.ci_parent->ci_parent
	  BUG since of NULL pointer dereference to nd_item.ci_parent

Moreover, the o2nm_cluster also should be protected by the
subsystem.su_mutex.

[alex.chen@huawei.com: v2]
  Link: http://lkml.kernel.org/r/59EEAA69.9080703@huawei.com
Link: http://lkml.kernel.org/r/59E9B36A.10700@huawei.com
Signed-off-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Salvatore Bonaccorso <carnil@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-22 14:28:42 +02:00
..
9p
fs/9p: Compare qid.path in v9fs_test_inode
2017-11-30 08:40:49 +00:00
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: mount point create should honour passed in mode
2018-04-24 09:36:39 +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: fix duplicate extents after fsync of file with prealloc extents
2018-07-22 14:28:42 +02:00
cachefiles
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ceph
ceph: fix potential memory leak in init_caches()
2018-05-30 07:52:09 +02:00
cifs
cifs: Fix slab-out-of-bounds in send_set_info() on SMB2 ACE setting
2018-07-11 16:29:15 +02:00
coda
coda: fix 'kernel memory exposure attempt' in fsync
2017-11-24 08:37:05 +01:00
configfs
configfs: Introduce config_item_get_unless_zero()
2017-06-12 13:20:20 +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: lock mutex before checking for bounce page pool
2017-11-30 08:40:44 +00:00
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
dax: change bdev_dax_supported() to support boolean returns
2018-07-11 16:29:22 +02:00
f2fs
f2fs: give message and set need_fsck given broken node id
2018-07-17 11:39:33 +02:00
fat
fs/fat/inode.c: fix sb_rdonly() change
2017-12-05 11:26:29 +01:00
freevxfs
…
fscache
fscache: Fix hanging wait on page discarded by writeback
2018-05-30 07:52:25 +02:00
fuse
fuse: fix control dir setup and teardown
2018-07-03 11:24:49 +02:00
gfs2
gfs2: Fix fallocate chunk size
2018-05-30 07:52:35 +02:00
hfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hfsplus
hfsplus: stop workqueue when fill_super() failed
2018-05-25 16:17:35 +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: fix potential memory leak in mount option parsing
2018-06-21 04:02:41 +09:00
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
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +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: Fix a typo in nfs41_sequence_process
2018-07-03 11:25:02 +02:00
nfs_common
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:39:08 +01:00
nfsd
nfsd: restrict rd_maxcount to svc_max_payload in nfsd_encode_readdir
2018-07-03 11:25:02 +02:00
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 send_to_group()
2018-06-21 04:02:41 +09:00
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: subsystem.su_mutex is required while accessing the item->ci_parent
2018-07-22 14:28:42 +02:00
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
ovl: fix lookup with middle layer opaque dir and absolute path redirects
2018-04-19 08:56:21 +02:00
proc
fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps*
2018-07-17 11:39:29 +02:00
pstore
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
quota: Check for register_shrinker() failure.
2018-02-03 17:39:11 +01:00
ramfs
mm: make pagevec_lookup() update index
2017-09-06 17:27:26 -07:00
reiserfs
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sysfs
sysfs: symlink: export sysfs_create_link_nowarn()
2018-03-31 18:10:38 +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: Fix potential integer overflow in allocation
2018-07-03 11:24:59 +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
dax: change bdev_dax_supported() to support boolean returns
2018-07-11 16:29:22 +02:00
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
fs, elf: make sure to page align bss in load_elf_library
2018-07-17 11:39:29 +02:00
binfmt_em86.c
…
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
fs/mpage.c: fix mpage_writepage() for pages with buffers
2017-10-13 16:18:33 -07:00
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
fs: dcache: Use READ_ONCE when accessing i_dir_seq
2018-05-30 07:52:03 +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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iomap.c
fs: invalidate page cache after end_io() in dio completion
2017-10-16 12:11:56 -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
locks: restore a warn for leaked locks on close
2017-07-21 13:57:31 -04:00
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
vfs: Undo an overly zealous MS_RDONLY -> SB_RDONLY conversion
2018-06-21 04:02:45 +09:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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: hugetlbfs: fix userfaultfd_huge_must_wait() pte access
2018-07-11 16:29:13 +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
lsm: fix smack_inode_removexattr and xattr_getsecurity memleak
2017-10-04 18:03:15 +11:00