The quilt patch titled Subject: ocfs2: prevent release journal inode after journal shutdown has been removed from the -mm tree. Its filename was ocfs2-prevent-release-journal-inode-after-journal-shutdown.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------ From: Edward Adam Davis eadavis@qq.com Subject: ocfs2: prevent release journal inode after journal shutdown Date: Tue, 19 Aug 2025 21:41:02 +0800
Before calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already been executed in ocfs2_dismount_volume(), so osb->journal must be NULL. Therefore, the following calltrace will inevitably fail when it reaches jbd2_journal_release_jbd_inode().
ocfs2_dismount_volume()-> ocfs2_delete_osb()-> ocfs2_free_slot_info()-> __ocfs2_free_slot_info()-> evict()-> ocfs2_evict_inode()-> ocfs2_clear_inode()-> jbd2_journal_release_jbd_inode(osb->journal->j_journal,
Adding osb->journal checks will prevent null-ptr-deref during the above execution path.
Link: https://lkml.kernel.org/r/tencent_357489BEAEE4AED74CBD67D246DBD2C4C606@qq.co... Fixes: da5e7c87827e ("ocfs2: cleanup journal init and shutdown") Signed-off-by: Edward Adam Davis eadavis@qq.com Reported-by: syzbot+47d8cb2f2cc1517e515a@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=47d8cb2f2cc1517e515a Tested-by: syzbot+47d8cb2f2cc1517e515a@syzkaller.appspotmail.com Reviewed-by: Mark Tinguely mark.tinguely@oracle.com Reviewed-by: Joseph Qi joseph.qi@linux.alibaba.com Cc: Mark Fasheh mark@fasheh.com Cc: Joel Becker jlbec@evilplan.org Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Changwei Ge gechangwei@live.cn Cc: Jun Piao piaojun@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
fs/ocfs2/inode.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/fs/ocfs2/inode.c~ocfs2-prevent-release-journal-inode-after-journal-shutdown +++ a/fs/ocfs2/inode.c @@ -1281,6 +1281,9 @@ static void ocfs2_clear_inode(struct ino * the journal is flushed before journal shutdown. Thus it is safe to * have inodes get cleaned up after journal shutdown. */ + if (!osb->journal) + return; + jbd2_journal_release_jbd_inode(osb->journal->j_journal, &oi->ip_jinode); } _
Patches currently in -mm which might be from eadavis@qq.com are