diff options
| author | Chao Yu <yuchao0@huawei.com> | 2020-03-19 19:58:00 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-03-30 20:46:24 -0700 |
| commit | 62f63eea291b50a5677ae7503ac128803174698a (patch) | |
| tree | 8873c75081824181f7a84468af9020089a38d3de /security/tomoyo | |
| parent | 8c7d4b57607bbcd1d754be58de34138d9429f3e4 (diff) | |
f2fs: fix NULL pointer dereference in f2fs_write_begin()
BUG: kernel NULL pointer dereference, address: 0000000000000000
RIP: 0010:f2fs_write_begin+0x823/0xb90 [f2fs]
Call Trace:
f2fs_quota_write+0x139/0x1d0 [f2fs]
write_blk+0x36/0x80 [quota_tree]
get_free_dqblk+0x42/0xa0 [quota_tree]
do_insert_tree+0x235/0x4a0 [quota_tree]
do_insert_tree+0x26e/0x4a0 [quota_tree]
do_insert_tree+0x26e/0x4a0 [quota_tree]
do_insert_tree+0x26e/0x4a0 [quota_tree]
qtree_write_dquot+0x70/0x190 [quota_tree]
v2_write_dquot+0x43/0x90 [quota_v2]
dquot_acquire+0x77/0x100
f2fs_dquot_acquire+0x2f/0x60 [f2fs]
dqget+0x310/0x450
dquot_transfer+0x7e/0x120
f2fs_setattr+0x11a/0x4a0 [f2fs]
notify_change+0x349/0x480
chown_common+0x168/0x1c0
do_fchownat+0xbc/0xf0
__x64_sys_fchownat+0x20/0x30
do_syscall_64+0x5f/0x220
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Passing fsdata parameter to .write_{begin,end} in f2fs_quota_write(),
so that if quota file is compressed one, we can avoid above NULL
pointer dereference when updating quota content.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'security/tomoyo')
0 files changed, 0 insertions, 0 deletions