]> www.infradead.org Git - users/jedix/linux-maple.git/commit
xen-scsiback: safely copy requests
authorDavid Vrabel <david.vrabel@citrix.com>
Mon, 16 Nov 2015 18:02:32 +0000 (18:02 +0000)
committerJoao Martins <joao.m.martins@oracle.com>
Sun, 27 Mar 2016 01:01:36 +0000 (02:01 +0100)
commit1f8ec040447f9fe74321cd277e7ab9d8cd5bdcd6
tree99b5b3fcb732ebd4dbe382def85ee9fe072a9054
parent2132f45e39cbcf8dcfc01d796af083083cb8f7dc
xen-scsiback: safely copy requests

The copy of the ring request was lacking a following barrier(),
potentially allowing the compiler to optimize the copy away.

Use RING_COPY_REQUEST() to ensure the request is copied to local
memory.

This is part of XSA155.

CC: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
(cherry picked from commit be69746ec12f35b484707da505c6c76ff06f97dc)
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
drivers/xen/xen-scsiback.c