From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>,
syzbot <syzbot+1f56df64bfb3c29dde6f@syzkaller.appspotmail.com>
Cc: dvhart@infradead.org, hpa@zytor.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@redhat.com,
rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com,
tglx@linutronix.de, x86@kernel.org
Subject: Re: general protection fault in finish_task_switch (2)
Date: Wed, 22 Aug 2018 11:22:06 +0200 [thread overview]
Message-ID: <2c4f99d0-0ac0-59f4-8793-2eeb47e975e8@redhat.com> (raw)
In-Reply-To: <20180822090823.GT24124@hirez.programming.kicks-ass.net>
On 22/08/2018 11:08, Peter Zijlstra wrote:
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10023961400000
>
>> RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2481
> That repro thing does something dodgy with KVM, which then corrupts the
> premption notifier thing. I'm sufficiently KVM clueless to not really
> know where to start looking though..
It seems to be a reference counting issue, or something like that. I'm
looking at it...
Paolo
next prev parent reply other threads:[~2018-08-22 9:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-10 14:42 general protection fault in finish_task_switch (2) syzbot
2018-08-21 21:28 ` syzbot
2018-08-22 9:08 ` Peter Zijlstra
2018-08-22 9:22 ` Paolo Bonzini [this message]
2018-08-24 20:16 ` Dmitry Vyukov
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