Re: KASAN: use-after-free Read in nbd_genl_connect

[Josef Bacik]

On 2/22/21 3:25 AM, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    f40ddce8 Linux 5.11
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=179e8d22d00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e53d04227c52a0df
> dashboard link: https://syzkaller.appspot.com/bug?extid=429d3f82d757c211bff3
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10d190cad00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13dc8a82d00000
>
> Bisection is inconclusive: the issue happens on the oldest tested release.
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1128ae60d00000
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1328ae60d00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1528ae60d00000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+429d3f82d757c211bff3@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz test:  git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git 
nbd-kasan-fix