linux-kernel - sending SEGV to qemu crashes host kernel in Fedora 19

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Message-ID: <CAPM=9twiAK18Ny7QMMZA+DHFB=wQ2pxg8rDV+vj91TJjd_e2fg@mail.gmail.com>
Date:	Tue, 9 Jul 2013 10:35:49 +1000
From:	Dave Airlie <airlied@...il.com>
To:	qemu-devel@...gnu.org, LKML <linux-kernel@...r.kernel.org>
Subject: sending SEGV to qemu crashes host kernel in Fedora 19

Hi,

F19
kernel-3.9.8-300.fc19.x86_64
qemu-kvm-1.4.2-4.fc19.x86_64

If I start a complete F19 install in the guest and send the qemu
process a SEGV signal, the host kernel starts giving me random kmalloc
errors soon after, if I send a normal kill signal things seem fine.

CPU is Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz, on a HP 220z workstation.

I initially blamed bad RAM but this reproduces everytime, and I
swapped DIMMs around

I haven't tested with upstream kernel/qemu yet, but I wondered if
anyone else has seen this.

I noticed this because some work I was doing was segfaulting my qemu
and then my machine would die a few mins later.

Dave.
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