Re: kvm-18 breaks Cisco VPN on WinXP SP1

Uri Lublin
2007-03-30T09:16:43Z

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When using rtc to keep qemu/host time, which is the default, qemu gets periodically SIGIO signals.

________________________________

From: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org on behalf of Avi Kivity
Sent: Fri 30/03/2007 09:48
To: Leslie Mann
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: [kvm-devel] kvm-18 breaks Cisco VPN on WinXP SP1

Leslie Mann wrote:
> That works. Here is the last 100 lines from the strace capture. Letme know if
> there is anything else you need.
>

[...]

> 21:05:48.736568 clock_gettime(CLOCK_MONOTONIC, {1334, 970496230}) = 0 <0.000010>
> 21:05:48.736618 sigreturn() = ? (mask now []) <0.000008>
> 21:05:48.736707 ioctl(10, 0xae80, 0) = 0 <0.000022>
> 21:05:48.736767 ioctl(10, 0xae80, 0) = 0 <0.000544>
> 21:05:48.744119 --- SIGIO (I/O possible) @ 0 (0) ---
> 21:05:48.744146 clock_gettime(CLOCK_MONOTONIC, {1334, 978076521}) = 0 <0.000010>
> 21:05:48.744200 sigreturn() = ? (mask now [INT QUIT TRAP FPE KILL
> SEGV TSTP URG SYS RTMIN]) <0.000010>
> 21:05:48.744285 --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>

The SIGIO means some I/O has occured, but what exactly, we don't know.
Can you generate a core, attach it with gdb, and generate a backtrace?

Check the backtrace for signs of your password and delete them if
found. It shouldn't be there, but then it shouldn't crash either.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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