linux-kernel - Re: [stable] [PATCH] kvm: fix crash on irqfd deassign

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Date:	Thu, 17 Mar 2011 09:13:08 -0700
From:	Greg KH <greg@...ah.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	jean-philippe.menil@...v-nantes.fr, stable@...nel.org,
	Jason Wang <jasowang@...hat.com>
Subject: Re: [stable] [PATCH] kvm: fix crash on irqfd deassign

On Thu, Mar 17, 2011 at 10:53:33AM +0200, Michael S. Tsirkin wrote:
> irqfd in kvm used flush_work incorrectly:
> it assumed that work scheduled previously can't run
> after flush_work, but since kvm uses a non-reentrant
> workqueue (by means of schedule_work)
> we need flush_work_sync to get that guarantee.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> Reported-by: Jean-Philippe Menil <jean-philippe.menil@...v-nantes.fr>
> Tested-by: Jean-Philippe Menil <jean-philippe.menil@...v-nantes.fr>
> ---
> 
> Note: this is needed for kernel 2.6.39 and earlier.

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

thanks,

greg k-h
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