From: Pengfei Xu <pengfei.xu@intel.com>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: <boqun.feng@gmail.com>, <quic_neeraju@quicinc.com>,
<paulmck@kernel.org>, <heng.su@intel.com>, <lkp@intel.com>,
<peterz@infradead.org>, <rcu@vger.kernel.org>
Subject: Re: [Syzkaller & bisect] There is "sys_perf_event_open" soft lockup BUG in v6.3-rc2 kernel
Date: Sat, 18 Mar 2023 10:32:17 +0800 [thread overview]
Message-ID: <ZBUisfcPvXzqrSQh@xpf.sh.intel.com> (raw)
In-Reply-To: <ZBR0qFQYoq4+2sXC@lothringen>
Hi Frederic Weisbecker,
On 2023-03-17 at 15:09:44 +0100, Frederic Weisbecker wrote:
> On Fri, Mar 17, 2023 at 03:48:33PM +0800, Pengfei Xu wrote:
> > Hi Frederic Weisbecker and kernel experts,
> >
> > Platform: x86 platforms
> > There is "sys_perf_event_open" soft lockup BUG in v6.3-rc2 kernel in guest.
>
> I can reproduce with you tests which is based on v6.2-rc5. However when
> I forward port your .config to a v6.3-rc2, the issue doesn't trigger anymore.
>
> Did you manage to reproduce on v6.3-rc2? And if so do you still have the related
> .config ?
>
Ah, I fogot to say: kconfig_origin will be changed after "make olddefconfig",
there were many items changed in .config after "make olddefconfig" in v6.3-rc2.
I used below way to make the .config.
1. Copy the kconfig origin to .config: https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/kconfig_origin
2. Fogort that the bisect script will change .config: CONFIG_LOCALVERSION="-kvm" -> CONFIG_LOCALVERSION="-eeac8ede1755", seems to have little effect.
3. make olddefconfig // Then .config will be changed in v6.3-rc2 kernel code.
Put .config after make olddefconfig in link:
https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/kconfig_v6.3-rc2_after_make_olddefconfig
4. make -jx bzImage //x should equal or less than cpu num your pc has
Put v6.3-rc2 bzImage in link:
https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/bzImage_eeac8ede17557680855031c6f305ece2378af326
And it could be reproduced after maunally test in 150s.
v6.3-rc2 reproduced dmesg:
https://github.com/xupengfe/syzkaller_logs/blob/main/230316_062127_sys_perf_event_open/v6.3-rc2_perf_related_problem_dmesg.log
And it could be reproduced on our ADL-N client x86 PC in guest.
Thanks!
BR.
-Pengfei
> Thanks.
next prev parent reply other threads:[~2023-03-18 2:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 7:48 [Syzkaller & bisect] There is "sys_perf_event_open" soft lockup BUG in v6.3-rc2 kernel Pengfei Xu
2023-03-17 14:09 ` Frederic Weisbecker
2023-03-18 2:32 ` Pengfei Xu [this message]
2023-03-20 16:48 ` Frederic Weisbecker
2023-03-21 5:53 ` Pengfei Xu
2023-03-22 7:19 ` Pengfei Xu
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