From: Krzysztof Kozlowski <krzk@kernel.org>
To: syzbot <syzbot+51471b4aae195285a4a3@syzkaller.appspotmail.com>
Cc: alexander.h.duyck@intel.com, amritha.nambiar@intel.com,
ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net,
davem@davemloft.net, ecree@solarflare.com, fw@strlen.de,
idosch@mellanox.com, jiri@mellanox.com, kafai@fb.com,
kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org,
lirongqing@baidu.com, netdev@vger.kernel.org, petrm@mellanox.com,
sd@queasysnail.net, songliubraving@fb.com,
syzkaller-bugs@googlegroups.com, yhs@fb.com,
yoshfuji@linux-ipv6.org
Subject: Re: BUG: using __this_cpu_read() in preemptible code in ip6_finish_output
Date: Fri, 5 Apr 2019 09:00:23 +0200 [thread overview]
Message-ID: <CAJKOXPcrimyMrK7LBbZLaqHGhS5dSCcBC1X01_pRY5evCD7n5Q@mail.gmail.com> (raw)
In-Reply-To: <000000000000db3c59058595f0ac@google.com>
On Wed, 3 Apr 2019 at 03:14, syzbot
<syzbot+51471b4aae195285a4a3@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
>
> commit 97cdcf37b57e3f204be3000b9eab9686f38b4356
> Author: Florian Westphal <fw@strlen.de>
> Date: Mon Apr 1 14:42:13 2019 +0000
>
> net: place xmit recursion in softnet data
I am seeing this as well on ARMv7 board booted from NFS root (exynos_defconfig):
[ 30.221238] BUG: using __this_cpu_read() in preemptible [00000000]
code: systemd-network/236
[ 30.228576] caller is ip6_output+0x68/0x3e8
[ 30.232578] CPU: 1 PID: 236 Comm: systemd-network Not tainted
5.1.0-rc3-next-20190405 #2
[ 30.240657] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[ 30.246719] [<c011238c>] (unwind_backtrace) from [<c010df50>]
(show_stack+0x10/0x14)
[ 30.254447] [<c010df50>] (show_stack) from [<c0a87270>] (dump_stack+0x98/0xc4)
[ 30.261638] [<c0a87270>] (dump_stack) from [<c0494a94>]
(__this_cpu_preempt_check+0x124/0x128)
[ 30.270238] [<c0494a94>] (__this_cpu_preempt_check) from [<c08e486c>]
(ip6_output+0x68/0x3e8)
[ 30.278730] [<c08e486c>] (ip6_output) from [<c08e52ac>]
(ip6_send_skb+0x30/0x1d0)
[ 30.286180] [<c08e52ac>] (ip6_send_skb) from [<c0912798>]
(rawv6_sendmsg+0x824/0x9c0)
[ 30.294005] [<c0912798>] (rawv6_sendmsg) from [<c07d8ff8>]
(sock_sendmsg+0x14/0x24)
[ 30.301628] [<c07d8ff8>] (sock_sendmsg) from [<c07d97cc>]
(___sys_sendmsg+0x230/0x244)
[ 30.309514] [<c07d97cc>] (___sys_sendmsg) from [<c07da9f8>]
(__sys_sendmsg+0x50/0x8c)
[ 30.317316] [<c07da9f8>] (__sys_sendmsg) from [<c01011ac>]
(__sys_trace_return+0x0/0x14)
[ 30.325376] Exception stack(0xe79f9fa8 to 0xe79f9ff0)
[ 30.330377] 9fa0: 00000000 b6f3da58 0000000b beeb2a6c 00000000 00000000
[ 30.338560] 9fc0: 00000000 b6f3da58 004015ce 00000128 004b10c8
00000000 020d28f9 00000000
[ 30.346708] 9fe0: 004aeee0 beeb2a40 0047cbdc b6d27684
Full log:
https://krzk.eu/#/builders/22/builds/1055/steps/13/logs/serial0
Best regards,
Krzysztof Kozlowski
next prev parent reply other threads:[~2019-04-05 7:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-02 22:44 BUG: using __this_cpu_read() in preemptible code in ip6_finish_output syzbot
2019-04-03 1:12 ` syzbot
2019-04-03 6:28 ` [PATCH net-next] net: use correct this_cpu primitive in dev_recursion_level Florian Westphal
2019-04-03 12:18 ` Eric Dumazet
2019-04-05 0:35 ` David Miller
2019-04-05 7:00 ` Krzysztof Kozlowski [this message]
2019-04-05 10:08 ` BUG: using __this_cpu_read() in preemptible code in ip6_finish_output Florian Westphal
2019-04-05 12:36 ` Dmitry Vyukov
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