Signed-off-by: Christopher Clark <christopher.cla...@baesystems.com>
Acked-by: Daniel De Graaf <dgde...@tycho.nsa.gov>
---
v3 #10 Roger: drop out label, use return -EFAULT in fill_ring_data
v3: Add Daniel's Acked-by
xen/common/argo.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/xen/common/argo.c b/xen/common/argo.c
index 23b61bf..ced8d47 100644
--- a/xen/common/argo.c
+++ b/xen/common/argo.c
@@ -1261,6 +1261,7 @@ fill_ring_data(const struct domain *currd,
xen_argo_ring_data_ent_t ent;
struct domain *dst_d;
struct argo_ring_info *ring_info;
+ int ret;
ASSERT(currd == current->domain);
ASSERT(LOCKING_Read_L1);
@@ -1278,6 +1279,17 @@ fill_ring_data(const struct domain *currd,
{
if ( dst_d->argo )
{
+ /*
+ * 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
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