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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2025-10-22 14:11:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-02 14:57:10 +0300 |
| commit | 4a9e50d881f5aac9ee01edc41abce9588982c0fc (patch) | |
| tree | acc031cb022d864de4ed8bef3ddce5bb3d1f7e32 /include/linux | |
| parent | b59fa60114806fa57961f23fa2c626ba3211f28b (diff) | |
| download | linux-4a9e50d881f5aac9ee01edc41abce9588982c0fc.tar.xz | |
jbd2: use a per-journal lock_class_key for jbd2_trans_commit_key
commit 524c3853831cf4f7e1db579e487c757c3065165c upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -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: |