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| author |   Edward Adam Davis <eadavis@qq.com> | 2025-08-19 21:41:02 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-08-27 22:45:41 -0700 |
| commit | f46e8ef8bb7b452584f2e75337b619ac51a7cadf (patch) | |
| tree | f37e4469001558a35046bb45e8df1ffc72d5b1f3 | |
| parent | rust: mm: mark VmaNew as transparent (diff) | |
| download | wireguard-linux-f46e8ef8bb7b452584f2e75337b619ac51a7cadf.tar.xz wireguard-linux-f46e8ef8bb7b452584f2e75337b619ac51a7cadf.zip | |
ocfs2: prevent release journal inode after journal shutdown
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.com
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>
| -rw-r--r-- | fs/ocfs2/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 14bf440ea4df..6c4f78f473fb 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -1281,6 +1281,9 @@ static void ocfs2_clear_inode(struct inode *inode) * 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); } |