linux-kernel - Re: [syzbot] [net?] KASAN: use-after-free Write in l2tp_tunnel_del

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Date:   Sun, 12 Mar 2023 15:27:22 -0700
From:   syzbot <syzbot+57d48d64daabde805330@...kaller.appspotmail.com>
To:     davem@...emloft.net, edumazet@...gle.com, hdanton@...a.com,
        jakub@...udflare.com, jiri@...dia.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] KASAN: use-after-free Write in
 l2tp_tunnel_del_work (2)

syzbot suspects this issue was fixed by commit:

commit d772781964415c63759572b917e21c4f7ec08d9f
Author: Jakub Kicinski <kuba@...nel.org>
Date:   Fri Jan 6 06:33:54 2023 +0000

    devlink: bump the instance index directly when iterating

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12e69652c80000
start commit:   355479c70a48 Merge tag 'efi-fixes-for-v6.1-4' of git://git..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=cc4b2e0a8e8a8366
dashboard link: https://syzkaller.appspot.com/bug?extid=57d48d64daabde805330
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1731caf3880000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: devlink: bump the instance index directly when iterating

For information about bisection process see: https://goo.gl/tpsmEJ#bisection