linux-kernel - Re: KASAN: use-after-free Write in afs_manage

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Message-ID: <CACT4Y+Ya+VbfXC6vn0cFJ0R6geg124vjxNzVo-g83iUV=gapdA@mail.gmail.com>
Date:   Sat, 14 Nov 2020 15:41:55 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+f59c67285cb61166a0cf@...kaller.appspotmail.com>
Cc:     David Howells <dhowells@...hat.com>,
        Fox Chen <foxhlchen@...il.com>,
        Hillf Danton <hdanton@...a.com>, linux-afs@...ts.infradead.org,
        linux-cachefs-bounces@...hat.com, linux-cachefs@...hat.com,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: KASAN: use-after-free Write in afs_manage_cell

On Sat, Nov 14, 2020 at 2:58 PM syzbot
<syzbot+f59c67285cb61166a0cf@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 1d0e850a49a5b56f8f3cb51e74a11e2fedb96be6
> Author: David Howells <dhowells@...hat.com>
> Date:   Fri Oct 16 12:21:14 2020 +0000
>
>     afs: Fix cell removal
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15b78dba500000
> start commit:   da690031 Merge branch 'i2c/for-current' of git://git.kerne..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=de7f697da23057c7
> dashboard link: https://syzkaller.appspot.com/bug?extid=f59c67285cb61166a0cf
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10960a8b900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17e938cf900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: afs: Fix cell removal
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: afs: Fix cell removal