From: "Paul E. McKenney" <paulmck@kernel.org>
To: syzbot <syzbot+7b2b13f4943374609532@syzkaller.appspotmail.com>
Cc: akpm@linux-foundation.org, andrii@kernel.org, ast@kernel.org,
axboe@kernel.dk, bpf@vger.kernel.org, christian@brauner.io,
coreteam@netfilter.org, daniel@iogearbox.net,
davem@davemloft.net, dsahern@kernel.org, dvyukov@google.com,
fw@strlen.de, jiangshanlai@gmail.com, joel@joelfernandes.org,
john.fastabend@gmail.com, josh@joshtriplett.org,
kadlec@netfilter.org, kafai@fb.com, kpsingh@kernel.org,
kuba@kernel.org, linux-kernel@vger.kernel.org,
mathieu.desnoyers@efficios.com, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, pablo@netfilter.org,
peterz@infradead.org, rcu@vger.kernel.org, rostedt@goodmis.org,
shakeelb@google.com, songliubraving@fb.com,
syzkaller-bugs@googlegroups.com, yanfei.xu@windriver.com,
yhs@fb.com, yoshfuji@linux-ipv6.org
Subject: Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace
Date: Mon, 21 Jun 2021 15:41:19 -0700 [thread overview]
Message-ID: <20210621224119.GW4397@paulmck-ThinkPad-P17-Gen-1> (raw)
In-Reply-To: <000000000000cac82d05c5214992@google.com>
On Sat, Jun 19, 2021 at 09:54:06AM -0700, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit f9006acc8dfe59e25aa75729728ac57a8d84fc32
> Author: Florian Westphal <fw@strlen.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@syzkaller.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
I am not seeing any mention of check_all_holdout_tasks_trace() in
the console output, but I again suggest the following two patches:
6a04a59eacbd ("rcu-tasks: Don't delete holdouts within trc_inspect_reader()"
dd5da0a9140e ("rcu-tasks: Don't delete holdouts within trc_wait_for_one_reader()")
Thanx, Paul
next prev parent reply other threads:[~2021-06-21 22:41 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 17:29 [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace syzbot
2021-05-23 6:51 ` Dmitry Vyukov
2021-05-24 4:13 ` Paul E. McKenney
2021-05-24 22:46 ` Paul E. McKenney
2021-05-25 2:31 ` Xu, Yanfei
2021-05-25 3:33 ` Paul E. McKenney
2021-05-25 8:33 ` Dmitry Vyukov
2021-05-25 14:36 ` Paul E. McKenney
2021-05-25 10:24 ` Xu, Yanfei
2021-05-25 14:28 ` Paul E. McKenney
2021-05-26 2:22 ` Xu, Yanfei
2021-05-26 4:21 ` Paul E. McKenney
2021-05-26 6:03 ` Xu, Yanfei
2021-06-18 20:45 ` syzbot
2021-06-21 22:37 ` Paul E. McKenney
2021-06-19 16:54 ` syzbot
2021-06-21 22:41 ` Paul E. McKenney [this message]
2021-06-28 8:43 ` Dmitry Vyukov
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