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| author | yangerkun <yangerkun@huawei.com> | 2020-10-28 08:56:17 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-10-28 20:43:13 +0300 |
| commit | d7dce9e08595e80bf8039a81794809c66fe26431 (patch) | |
| tree | 4f7d7c6bacdd04699ec030081195d84feacc0506 /fs/ext4/dir.c | |
| parent | 8c9be1e58a8dc03ef815ca51ece95c5e6862b25e (diff) | |
| download | linux-d7dce9e08595e80bf8039a81794809c66fe26431.tar.xz | |
ext4: do not use extent after put_bh
ext4_ext_search_right() will read more extent blocks and call put_bh
after we get the information we need. However, ret_ex will break this
and may cause use-after-free once pagecache has been freed. Fix it by
copying the extent structure if needed.
Signed-off-by: yangerkun <yangerkun@huawei.com>
Link: https://lore.kernel.org/r/20201028055617.2569255-1-yangerkun@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4/dir.c')
0 files changed, 0 insertions, 0 deletions