Re: [syzbot] KASAN: null-ptr-deref Read in filp_close (2)

[Christian Brauner]

On Mon, Jul 12, 2021 at 09:12:20PM -0700, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    7fef2edf sd: don't mess with SD_MINORS for CONFIG_DEBUG_BL..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=178919b0300000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=20276914ec6ad813
> dashboard link: https://syzkaller.appspot.com/bug?extid=283ce5a46486d6acdbaf
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=120220f2300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=115f37b4300000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+283ce5a46486d6acdbaf@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/ syzbot+283ce5a46486d6acdbaf