netdev - Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks

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Message-ID: <000000000000cac82d05c5214992@google.com>
Date:   Sat, 19 Jun 2021 09:54:06 -0700
From:   syzbot <syzbot+7b2b13f4943374609532@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, andrii@...nel.org, ast@...nel.org,
        axboe@...nel.dk, bpf@...r.kernel.org, christian@...uner.io,
        coreteam@...filter.org, daniel@...earbox.net, davem@...emloft.net,
        dsahern@...nel.org, dvyukov@...gle.com, fw@...len.de,
        jiangshanlai@...il.com, joel@...lfernandes.org,
        john.fastabend@...il.com, josh@...htriplett.org,
        kadlec@...filter.org, kafai@...com, kpsingh@...nel.org,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        mathieu.desnoyers@...icios.com, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        paulmck@...nel.org, peterz@...radead.org, rcu@...r.kernel.org,
        rostedt@...dmis.org, shakeelb@...gle.com, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yanfei.xu@...driver.com,
        yhs@...com, yoshfuji@...ux-ipv6.org
Subject: Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace

syzbot has bisected this issue to:

commit f9006acc8dfe59e25aa75729728ac57a8d84fc32
Author: Florian Westphal <fw@...len.de>
Date:   Wed Apr 21 07:51:08 2021 +0000

    netfilter: arp_tables: pass table pointer via nf_hook_ops

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10dceae8300000
start commit:   0c38740c selftests/bpf: Fix ringbuf test fetching map FD
git tree:       bpf-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12dceae8300000
console output: https://syzkaller.appspot.com/x/log.txt?x=14dceae8300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a6380da8984033f1
dashboard link: https://syzkaller.appspot.com/bug?extid=7b2b13f4943374609532
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1264c2d7d00000

Reported-by: syzbot+7b2b13f4943374609532@...kaller.appspotmail.com
Fixes: f9006acc8dfe ("netfilter: arp_tables: pass table pointer via nf_hook_ops")

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