On Wed, Feb 24, 2021 at 06:03:56PM +0100, SeongJae Park wrote:
> This is a request for merge of upstream commit 4a658527271b ("xen-netback:
> delete NAPI instance when queue fails to initialize") on v4.4.y tree.
>
> If 'xenvif_connect()' fails after successful 'netif_napi_add()', the napi is
> not cleaned up. Because 'create_queues()' frees the queues in its error
> handling code, if the 'xenvif_free()' is called for the vif, use-after-free
> occurs. The upstream commit fixes the problem by cleaning up the napi in the
> 'xenvif_connect()'.
>
> Attaching the original patch below for your convenience.
The original patch does not apply cleanly.
> Tested-by: Markus Boehme <markubo@xxxxxxxxx>
What was tested?
I backported the patch, but next time, please provide the patch that
will work properly.
greg k-h
