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Ronnie Sahlberg 5c61a608d8 cifs: check ntwrk_buf_start for NULL before dereferencing it 
[ Upstream commit 59a63e479ce36a3f24444c3a36efe82b78e4a8e0 ]

RHBZ: 1021460

There is an issue where when multiple threads open/close the same directory
ntwrk_buf_start might end up being NULL, causing the call to smbCalcSize
later to oops with a NULL deref.

The real bug is why this happens and why this can become NULL for an
open cfile, which should not be allowed.
This patch tries to avoid a oops until the time when we fix the underlying
issue.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-02-12 19:44:58 +01:00
..
9p
v9fs_dir_readdir: fix double-free on p9stat_read error
2018-12-01 09:44:18 +01:00
adfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
affs
affs_lookup(): close a race with affs_remove_link()
2018-05-30 07:50:16 +02:00
afs
afs: Fix abort on signal while waiting for call completion
2017-12-20 10:07:25 +01:00
autofs4
autofs: fix autofs_sbi() does not check super block type
2018-09-19 22:47:16 +02:00
befs
befs fixes for 4.9-rc1
2016-10-15 12:09:13 -07:00
bfs
bfs: add sanity check at bfs_fill_super()
2018-12-01 09:44:19 +01:00
btrfs
btrfs: dev-replace: go back to suspended state if target device is missing
2019-01-31 08:12:37 +01:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-12-17 09:38:34 +01:00
ceph
ceph: don't update importing cap's mseq when handing cap export
2019-01-13 10:03:54 +01:00
cifs
cifs: check ntwrk_buf_start for NULL before dereferencing it
2019-02-12 19:44:58 +01:00
coda
coda: fix 'kernel memory exposure attempt' in fsync
2017-11-24 08:33:42 +01:00
configfs
configfs: replace strncpy with memcpy
2018-11-21 09:26:03 +01:00
cramfs
Cramfs: fix abad comparison when wrap-arounds occur
2018-11-13 11:17:03 -08:00
crypto
fscrypt: use unbound workqueue for decryption
2018-08-03 07:55:20 +02:00
debugfs
dentry name snapshots
2017-08-06 18:59:43 -07:00
devpts
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
dlm
dlm: Don't swamp the CPU with callbacks queued during recovery
2019-02-12 19:44:51 +01:00
ecryptfs
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:50:16 +02:00
efivarfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
efs
…
exofs
fs/exofs: fix potential memory leak in mount option parsing
2018-11-27 16:09:38 +01:00
exportfs
exportfs: do not read dentry after free
2018-12-17 09:38:33 +01:00
ext2
ext2: fix potential use after free
2018-12-05 19:42:40 +01:00
ext4
ext4: avoid kernel warning when writing the superblock to a dead device
2019-01-16 22:12:33 +01:00
f2fs
f2fs: fix wrong return value of f2fs_acl_create
2019-02-12 19:44:53 +01:00
fat
fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
2018-11-10 07:42:56 -08:00
freevxfs
…
fscache
fscache: fix race between enablement and dropping of object
2018-12-17 09:38:34 +01:00
fuse
fuse: fix leaked notify reply
2018-11-21 09:26:03 +01:00
gfs2
gfs2: Revert "Fix loop in gfs2_rbm_find"
2019-02-06 17:33:28 +01:00
hfs
hfs: do not free node before using
2018-12-17 09:38:35 +01:00
hfsplus
hfsplus: do not free node before using
2018-12-17 09:38:35 +01:00
hostfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
hpfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
hugetlbfs
hugetlbfs: fix bug in pgoff overflow checking
2018-12-08 13:05:15 +01:00
isofs
isofs: fix timestamps beyond 2027
2017-11-30 08:39:04 +00:00
jbd2
jbd2: fix use after free in jbd2_log_do_checkpoint()
2018-11-13 11:16:55 -08:00
jffs2
jffs2: Fix use of uninitialized delayed_work, lockdep breakage
2019-01-26 09:38:33 +01:00
jfs
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
2018-08-09 12:18:00 +02:00
kernfs
kernfs: Replace strncpy with memcpy
2018-12-08 13:05:05 +01:00
lockd
lockd: fix access beyond unterminated strings in prints
2018-11-13 11:17:02 -08:00
logfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
minix
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
staging: ncpfs: memory corruption in ncp_read_kernel()
2018-03-28 18:39:23 +02:00
nfs
NFS: nfs_compare_mount_options always compare auth flavors.
2019-02-12 19:44:57 +01:00
nfs_common
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:05:38 +01:00
nfsd
nfsd4: fix crash on writing v4_end_grace before nfsd startup
2019-02-12 19:44:53 +01:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:50:16 +02:00
nls
…
notify
fanotify: fix handling of events on child sub-directory
2019-02-06 17:33:30 +01:00
ntfs
fs: remove the never implemented aio_fsync file operation
2016-10-30 13:09:42 -04:00
ocfs2
ocfs2: fix panic due to unrecovered local alloc
2019-01-26 09:38:35 +01:00
omfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
openpromfs
fs: Replace CURRENT_TIME with current_time() for inode timestamps
2016-09-27 21:06:21 -04:00
orangefs
orangefs: off by ones in xattr size checks
2018-11-10 07:42:46 -08:00
overlayfs
ovl: filter trusted xattr for non-admin
2018-04-13 19:48:12 +02:00
proc
proc: Remove empty line in /proc/self/status
2019-01-23 08:10:53 +01:00
pstore
pstore/ram: Do not treat empty buffers as valid
2019-01-26 09:38:33 +01:00
qnx4
…
qnx6
…
quota
fs/quota: Fix spectre gadget in do_quotactl
2018-09-09 20:01:26 +02:00
ramfs
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
reiserfs: propagate errors from fill_with_dentries() properly
2018-11-27 16:09:38 +01:00
romfs
romfs: use different way to generate fsid for BLOCK or MTD
2017-06-17 06:41:56 +02:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-09-05 09:20:03 +02:00
sysfs
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
2018-09-05 09:20:10 +02:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-12-17 09:38:32 +01:00
tracefs
fs: Replace CURRENT_TIME with current_time() for inode timestamps
2016-09-27 21:06:21 -04:00
ubifs
ubifs: Handle re-linking of inodes correctly while recovery
2018-12-29 13:40:16 +01:00
udf
udf: Fix BUG on corrupted inode
2019-02-12 19:44:55 +01:00
ufs
ufs: we need to sync inode before freeing it
2018-11-10 07:42:49 -08:00
xfs
xfs: don't fail when converting shortform attr to long form during ATTR_REPLACE
2018-12-08 13:05:15 +01:00
aio.c
aio: fix spectre gadget in lookup_ioctx
2018-12-21 14:11:31 +01:00
anon_inodes.c
…
attr.c
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.c
bad_inode: add missing i_op initializers
2017-01-09 08:32:24 +01:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
binfmt_elf: Respect error return from `regset->active'
2018-09-26 08:36:37 +02:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
fs/binfmt_misc.c: do not allow offset overflow
2018-06-26 08:08:09 +08:00
binfmt_script.c
…
block_dev.c
blockdev: Fix livelocks on loop device
2019-01-23 08:10:56 +01:00
buffer.c
fs: add i_blocksize()
2017-06-14 15:06:00 +02:00
char_dev.c
…
compat_binfmt_elf.c
binfmt_elf: compat: avoid unused function warning
2018-02-25 11:05:55 +01:00
compat_ioctl.c
fs: compat: Remove warning from COMPATIBLE_IOCTL
2018-04-08 12:12:44 +02:00
compat.c
compat: remove compat_printk()
2016-09-27 21:20:53 -04:00
coredump.c
coredump: Ensure proper size of sparse core files
2017-07-05 14:40:26 +02:00
dax.c
fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
2018-02-28 10:18:33 +01:00
dcache.c
fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
2019-02-06 17:33:28 +01:00
dcookies.c
…
direct-io.c
fs: fix lost error code in dio_complete
2018-12-05 19:42:40 +01:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
epoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove()
2017-09-07 08:35:41 +02:00
exec.c
exec: avoid gcc-8 warning for get_task_comm
2018-07-28 07:49:14 +02:00
fcntl.c
fs/fcntl: f_setown, avoid undefined behaviour
2018-01-31 12:55:52 +01:00
fhandle.c
…
file_table.c
…
file.c
fs/file: more unsigned file descriptors
2016-09-27 18:47:38 -04:00
filesystems.c
…
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-16 10:08:42 +02:00
inode.c
Fix up non-directory creation in SGID directories
2018-07-17 11:37:53 +02:00
internal.h
xfs: evict all inodes involved with log redo item
2017-09-20 08:20:01 +02:00
ioctl.c
vfs: cap dedupe request structure size at PAGE_SIZE
2016-09-15 13:29:52 -07:00
iomap.c
iomap: fix integer truncation issues in the zeroing and dirtying helpers
2017-09-20 08:19:59 +02:00
Kconfig
mm/hugetlb: introduce ARCH_HAS_GIGANTIC_PAGE
2016-10-07 18:46:29 -07:00
Kconfig.binfmt
…
libfs.c
libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
2017-12-09 22:01:51 +01:00
locks.c
locking, fs/locks: Add missing file_sem locks
2016-10-18 12:21:28 +02:00
Makefile
…
mbcache.c
mbcache: initialize entry->e_referenced in mb_cache_entry_create()
2018-02-22 15:43:48 +01:00
mount.h
mnt: In propgate_umount handle visiting mounts in any order
2017-07-21 07:42:22 +02:00
mpage.c
fs/mpage.c: fix mpage_writepage() for pages with buffers
2017-10-18 09:35:39 +02:00
namei.c
namei: allow restricted O_CREAT of FIFOs and regular files
2018-12-01 09:44:25 +01:00
namespace.c
mount: Prevent MNT_DETACH from disconnecting locked mounts
2018-11-21 09:26:02 +01:00
no-block.c
…
nsfs.c
nsfs: mark dentry with DCACHE_RCUACCESS
2018-02-17 13:21:15 +01:00
open.c
fs: completely ignore unknown open flags
2017-07-12 15:01:02 +02:00
pipe.c
pipe: fix off-by-one error when checking buffer limits
2018-02-17 13:21:18 +01:00
pnode.c
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-07-21 07:42:22 +02:00
pnode.h
mnt: Tuck mounts under others instead of creating shadow/side mounts.
2017-03-15 10:02:43 +08:00
posix_acl.c
tmpfs: clear S_ISGID when setting posix ACLs
2017-01-26 08:24:37 +01:00
proc_namespace.c
…
read_write.c
fs: add the fsnotify call to vfs_iter_write
2019-02-06 17:33:26 +01:00
readdir.c
…
select.c
fs/select: add vmalloc fallback for select(2)
2016-10-11 15:06:30 -07:00
seq_file.c
seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char
2016-10-07 18:46:30 -07:00
signalfd.c
…
splice.c
vfs: fix uninitialized flags in splice_to_pipe()
2017-02-23 17:44:35 +01:00
stack.c
…
stat.c
ufs: restore maintaining ->i_blocks
2017-06-14 15:06:01 +02:00
statfs.c
…
super.c
fs: don't scan the inode cache before SB_BORN is set
2019-02-06 17:33:29 +01:00
sync.c
…
timerfd.c
timerfd: Protect the might cancel mechanism proper
2017-05-08 07:47:54 +02:00
userfaultfd.c
userfaultfd: shmem: __do_fault requires VM_FAULT_NOPAGE
2017-12-20 10:07:18 +01:00
utimes.c
Merge remote-tracking branch 'jk/vfs' into work.misc
2016-10-08 11:06:08 -04:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-10-10 08:53:22 +02:00