Re: WARNING in sysfs_remove_group (2)

From: Tetsuo Handa
Date: Sun Nov 25 2018 - 08:06:47 EST


On 2018/11/25 20:21, syzbot wrote:
> syzbot has found a reproducer for the following crash on:
>
> HEAD commit:ÂÂÂ e195ca6cb6f2 Merge branch 'for-linus' of git://git.kernel...
> git tree:ÂÂÂÂÂÂ upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1659a62b400000
> kernel config:Â https://syzkaller.appspot.com/x/.config?x=73e2bc0cb6463446
> dashboard link: https://syzkaller.appspot.com/bug?extid=34cbd0f790e5ab87f63b
> compiler:ÂÂÂÂÂÂ gcc (GCC) 8.0.1 20180413 (experimental)
> syz repro:ÂÂÂÂÂ https://syzkaller.appspot.com/x/repro.syz?x=14dad1f5400000
> C reproducer:ÂÂ https://syzkaller.appspot.com/x/repro.c?x=1211db83400000

C reproducer is essentially same with below one.

#syz dup: WARNING in kernfs_get