[Xen-devel] [PATCH v6 14/15] xsm, argo: notify: don't describe rings that cannot be sent to

[Christopher Clark <christopher.w.clark@xxxxxxxxx>]

Signed-off-by: Christopher Clark <christopher.clark6@xxxxxxxxxxxxxx>
Acked-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>

v3 #10 Roger: drop out label, use return -EFAULT in fill_ring_data
v3: Add Daniel's Acked-by
---
 xen/common/argo.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/xen/common/argo.c b/xen/common/argo.c
index ba9c1d6..c7b091b 100644
--- a/xen/common/argo.c
+++ b/xen/common/argo.c
@@ -1371,6 +1371,17 @@ fill_ring_data(const struct domain *currd,
     if ( !dst_d || !dst_d->argo )
         goto out;
 
+    /*
+     * Don't supply information about rings that a guest is not
+     * allowed to send to.
+     */
+    ret = xsm_argo_send(currd, dst_d);
+    if ( ret )
+    {
+        put_domain(dst_d);
+        return ret;
+    }
+
     read_lock(&dst_d->argo->rings_L2_rwlock);
 
     ring_info = find_ring_info_by_match(dst_d, ent.ring.aport,
-- 
2.7.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel