diff options
Diffstat (limited to 'system/xen/xsa/xsa224-0002-gnttab-never-create-host-mapping-unless-asked-to.patch')
-rw-r--r-- | system/xen/xsa/xsa224-0002-gnttab-never-create-host-mapping-unless-asked-to.patch | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/system/xen/xsa/xsa224-0002-gnttab-never-create-host-mapping-unless-asked-to.patch b/system/xen/xsa/xsa224-0002-gnttab-never-create-host-mapping-unless-asked-to.patch deleted file mode 100644 index bea0214db0e10..0000000000000 --- a/system/xen/xsa/xsa224-0002-gnttab-never-create-host-mapping-unless-asked-to.patch +++ /dev/null @@ -1,42 +0,0 @@ -From 2d6357522946bd5a105066db8079e5dd46cb3047 Mon Sep 17 00:00:00 2001 -From: Jan Beulich <jbeulich@suse.com> -Date: Fri, 2 Jun 2017 15:21:27 +0100 -Subject: [PATCH 2/4] gnttab: never create host mapping unless asked to - -We shouldn't create a host mapping unless asked to even in the case of -mapping a granted MMIO page. In particular the mapping wouldn't be torn -down when processing the matching unmap request. - -This is part of XSA-224. - -Reported-by: Jan Beulich <jbeulich@suse.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> ---- - xen/common/grant_table.c | 11 +++++++---- - 1 file changed, 7 insertions(+), 4 deletions(-) - -diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c -index 2671761..5baae24 100644 ---- a/xen/common/grant_table.c -+++ b/xen/common/grant_table.c -@@ -907,10 +907,13 @@ __gnttab_map_grant_ref( - goto undo_out; - } - -- rc = create_grant_host_mapping( -- op->host_addr, frame, op->flags, cache_flags); -- if ( rc != GNTST_okay ) -- goto undo_out; -+ if ( op->flags & GNTMAP_host_map ) -+ { -+ rc = create_grant_host_mapping(op->host_addr, frame, op->flags, -+ cache_flags); -+ if ( rc != GNTST_okay ) -+ goto undo_out; -+ } - } - else if ( owner == rd || owner == dom_cow ) - { --- -2.1.4 - |