linux-kernel - Re: KASAN: use-after-free Read in dump

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Message-ID: <CACT4Y+ZC=_Nr1QdE48MLZe1YxhtB4FyR4LwUg-uvD4-ktwE0Rg@mail.gmail.com>
Date:   Mon, 25 Jan 2021 10:35:27 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+621fd33c0b53d15ee8de@...kaller.appspotmail.com>
Cc:     Anant Thazhemadam <anant.thazhemadam@...il.com>,
        anmol.karan123@...il.com, coreteam@...filter.org,
        David Miller <davem@...emloft.net>,
        Florian Westphal <fw@...len.de>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiří Pírko <jiri@...nulli.us>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Jakub Kicinski <kuba@...nel.org>,
        leandro.maciel.dorileo@...el.com,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        NetFilter <netfilter-devel@...r.kernel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        subashab@...eaurora.org,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        vedang.patel@...el.com, Cong Wang <xiyou.wangcong@...il.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: KASAN: use-after-free Read in dump_schedule

On Fri, Jan 22, 2021 at 6:21 PM syzbot
<syzbot+621fd33c0b53d15ee8de@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit cc00bcaa589914096edef7fb87ca5cee4a166b5c
> Author: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
> Date:   Wed Nov 25 18:27:22 2020 +0000
>
>     netfilter: x_tables: Switch synchronization to RCU
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10879d68d00000
> start commit:   59126901 Merge tag 'perf-tools-fixes-for-v5.9-2020-09-03' ..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299
> dashboard link: https://syzkaller.appspot.com/bug?extid=621fd33c0b53d15ee8de
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152c3af9900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12213b71900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: netfilter: x_tables: Switch synchronization to RCU
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: netfilter: x_tables: Switch synchronization to RCU