From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>,
syzbot <syzbot+00be5da1d75f1cc95f6b@syzkaller.appspotmail.com>
Cc: bp@alien8.de, hpa@zytor.com, jmattson@google.com,
joro@8bytes.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@redhat.com,
rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com,
tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com,
x86@kernel.org
Subject: Re: WARNING in vcpu_enter_guest
Date: Thu, 19 Mar 2020 16:14:55 +0100 [thread overview]
Message-ID: <20be9560-fce7-1495-3a83-e2b56dbc2389@redhat.com> (raw)
In-Reply-To: <20200319144952.GB11305@linux.intel.com>
On 19/03/20 15:49, Sean Christopherson wrote:
> On Thu, Mar 19, 2020 at 03:35:16AM -0700, syzbot wrote:
>> syzbot has found a reproducer for the following crash on:
>>
>> HEAD commit: 5076190d mm: slub: be more careful about the double cmpxch..
>> git tree: upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=143ca61de00000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=9f894bd92023de02
>> dashboard link: https://syzkaller.appspot.com/bug?extid=00be5da1d75f1cc95f6b
>> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10bb4023e00000
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+00be5da1d75f1cc95f6b@syzkaller.appspotmail.com
> Reproduced with a little tweaking of the reproducer, debug in progress.
>
I think the WARN_ON at x86.c:2447 is just bogus. You can always get it
to trigger if garbage is passed to KVM_SET_CLOCK.
Paolo
next prev parent reply other threads:[~2020-03-19 15:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 8:20 WARNING in vcpu_enter_guest syzbot
2020-03-19 10:35 ` syzbot
2020-03-19 14:49 ` Sean Christopherson
2020-03-19 15:14 ` Paolo Bonzini [this message]
2020-03-19 17:35 ` Sean Christopherson
2020-03-19 17:39 ` Sean Christopherson
2020-03-19 17:44 ` Paolo Bonzini
2020-03-20 0:18 ` Thomas Gleixner
2020-03-20 10:33 ` Paolo Bonzini
2020-03-20 13:33 ` Thomas Gleixner
2020-03-22 3:31 ` syzbot
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