[pve-devel] centos crash after livemigration fix

Dietmar Maurer dietmar at proxmox.com
Fri Mar 2 09:50:17 CET 2012


just pushed and update to the git repository - please test.

Seems we still need usb-hid-fix-tablet-activation.diff?

- Dietmar

> -----Original Message-----
> From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel-
> bounces at pve.proxmox.com] On Behalf Of Derumier Alexandre
> Sent: Freitag, 02. März 2012 09:18
> To: pve-devel at pve.proxmox.com
> Subject: [pve-devel] centos crash after livemigration fix
> 
> Hi, I finnaly found a patch in the last patches serie from redhat developper.
> (not yes apply in qemu or kvm tree,only in the mailing for the moment).
> 
> This correct a bug in usb initialize which cause kvm segfault on random guest os.
> 
> 
> 
> 
> 
> 
> 
> Check for dev->config being NULL in two places:
>  USB_REQ_GET_CONFIGURATION and USB_REQ_GET_STATUS.
> 
> The behavior of USB_REQ_GET_STATUS is unspecified in the Default state, that
> corresponds to dev->config being NULL (it defaults to NULL and is reset
> whenever a SET_CONFIGURATION with value 0, or attachment). I implemented
> it to correspond with the state before
> ed5a83ddd8c1d8ec7b1015315530cf29949e7c48, the commit moving
> SET_STATUS to usb-desc; if dev->config is not set we return whatever is in the
> first configuration.
> 
> The behavior of USB_REQ_GET_CONFIGURATION is also undefined before any
> SET_CONFIGURATION, but here we just return 0 (same as specified for the
> Address state).
> 
> A win7 guest failed to initialize the device before this patch, segfaulting when
> GET_STATUS was called with dev->config == NULL. With this patch the
> passthrough device still doesn't work but the failure is unrelated.
> 
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