Re: [Qemu-devel] Qemu crashed while unpluging IDE disk

[Stefan Hajnoczi]

On Fri, Jun 07, 2013 at 02:31:00PM +0000, Gonglei (Arei) wrote:
> While starting a Fedora_14 guest, we came across a segfault of qemu:
> 
> the logs in /var/log/messages are: 
> Jun  1 02:38:56 NC587 kernel: [403549.565754] show_signal_msg: 136 callbacks 
> suppressed
> Jun  1 02:38:56 NC587 kernel: [403549.565758] qemu-system-i38[25840]: 
> segfault at 28 ip 0000000000418d91 sp 00007fe02aef4f00 error 4 in 
> qemu-system-i386[400000+350000]
> 
> the very segfault refers to the code:
> /*
>  * Handle a read request in coroutine context
>  */
> static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs,
>     int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
>     BdrvRequestFlags flags)
> {
>     BlockDriver *drv = bs->drv;    //The segfault occurs when bs equals to 
> NULL.
>     BdrvTrackedRequest req;
>     int ret;
> 
> 
> NOTE: we are running on a XEN hypervisor with qemu 1.2.0      

Can you try qemu.git/master?

Stefan