diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2025-10-22 20:11:37 +0900 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-11-13 08:34:39 -0500 |
| commit | 524c3853831cf4f7e1db579e487c757c3065165c (patch) | |
| tree | 81ad534da46f609ab497b1cdc796293e6c5051cc /include/linux/jbd2.h | |
| parent | b97cb7d6a051aa6ebd57906df0e26e9e36c26d14 (diff) | |
jbd2: use a per-journal lock_class_key for jbd2_trans_commit_key
syzbot is reporting possibility of deadlock due to sharing lock_class_key
for jbd2_handle across ext4 and ocfs2. But this is a false positive, for
one disk partition can't have two filesystems at the same time.
Reported-by: syzbot+6e493c165d26d6fcbf72@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=6e493c165d26d6fcbf72
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: syzbot+6e493c165d26d6fcbf72@syzkaller.appspotmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Message-ID: <987110fc-5470-457a-a218-d286a09dd82f@I-love.SAKURA.ne.jp>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 43b9297fe8a7..f5eaf76198f3 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -1253,6 +1253,12 @@ struct journal_s */ struct lockdep_map j_trans_commit_map; #endif + /** + * @jbd2_trans_commit_key: + * + * "struct lock_class_key" for @j_trans_commit_map + */ + struct lock_class_key jbd2_trans_commit_key; /** * @j_fc_cleanup_callback: |