On Tue, May 15, 2018 at 07:11:06PM +0900, Tetsuo Handa wrote: > From ffd64dcf946502e7bb1d23c021ee9a4fc92f9312 Mon Sep 17 00:00:00 2001 > From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Date: Tue, 15 May 2018 12:23:03 +0900 > Subject: [PATCH] hfsplus: stop workqueue when fill_super() failed > > syzbot is reporting ODEBUG messages at hfsplus_fill_super() [1]. > This is because hfsplus_fill_super() forgot to call > cancel_delayed_work_sync(). > > As far as I can see, it is hfsplus_mark_mdb_dirty() from > hfsplus_new_inode() in hfsplus_fill_super() that calls > queue_delayed_work(). Therefore, I assume that hfsplus_new_inode() does not > fail if queue_delayed_work() was called, and the out_put_hidden_dir label > is the appropriate location to call cancel_delayed_work_sync(). > > [1] https://syzkaller.appspot.com/bug?id=a66f45e96fdbeb76b796bf46eb25ea878c42a6c9 > > Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Reported-by: syzbot <syzbot+4f2e5f086147d543ab03@xxxxxxxxxxxxxxxxxxxxxxxxx> > Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> > --- > fs/hfsplus/super.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c > index 9e690ae..80abba5 100644 > --- a/fs/hfsplus/super.c > +++ b/fs/hfsplus/super.c > @@ -590,6 +590,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) > return 0; > > out_put_hidden_dir: > + cancel_delayed_work_sync(&sbi->sync_work); > iput(sbi->hidden_dir); > out_put_root: > dput(sb->s_root); > -- > 1.8.3.1 > > I sent this same patch a couple of weeks ago: https://www.spinics.net/lists/linux-fsdevel/msg125240.html I should probably have sent it in reply to syzbot to prevent this kind of duplication of work. Sorry about that.
