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| author | Lizhi Xu <lizhi.xu@windriver.com> | 2024-09-02 04:36:36 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-10 00:15:54 +0200 |
| commit | 33b525cef4cff49e216e4133cc48452e11c0391e (patch) | |
| tree | 99182cc87b673503c3b28031086409fcaaad4ef9 /fs/ocfs2/buffer_head_io.c | |
| parent | ocfs2: remove unreasonable unlock in ocfs2_read_blocks (diff) | |
| download | linux-33b525cef4cff49e216e4133cc48452e11c0391e.tar.xz linux-33b525cef4cff49e216e4133cc48452e11c0391e.zip | |
ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate
When doing cleanup, if flags without OCFS2_BH_READAHEAD, it may trigger
NULL pointer dereference in the following ocfs2_set_buffer_uptodate() if
bh is NULL.
Link: https://lkml.kernel.org/r/20240902023636.1843422-3-joseph.qi@linux.alibaba.com
Fixes: cf76c78595ca ("ocfs2: don't put and assigning null to bh allocated outside")
Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reported-by: Heming Zhao <heming.zhao@suse.com>
Suggested-by: Heming Zhao <heming.zhao@suse.com>
Cc: <stable@vger.kernel.org> [4.20+]
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/buffer_head_io.c')
| -rw-r--r-- | fs/ocfs2/buffer_head_io.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c index e62c7e1de4eb..8f714406528d 100644 --- a/fs/ocfs2/buffer_head_io.c +++ b/fs/ocfs2/buffer_head_io.c @@ -388,7 +388,8 @@ read_failure: /* Always set the buffer in the cache, even if it was * a forced read, or read-ahead which hasn't yet * completed. */ - ocfs2_set_buffer_uptodate(ci, bh); + if (bh) + ocfs2_set_buffer_uptodate(ci, bh); } ocfs2_metadata_cache_io_unlock(ci); |