tree c0131da83deecb494bc6c6e3f477b48f98bf1e7e
parent 967fe4536a90d8e257f25aabb95069fad013b0d2
author Juergen Gross <jgross@suse.com> 1638188071 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1638949504 +0100

xen/netfront: read response from backend only once

commit 8446066bf8c1f9f7b7412c43fbea0fb87464d75b upstream.

In order to avoid problems in case the backend is modifying a response
on the ring page while the frontend has already seen it, just read the
response into a local buffer in one go and then operate on that buffer
only.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>