From: Roger Pau Monné <roger.pau@citrix.com>
Date: Fri, 2 Oct 2020 06:38:50 +0000 (+0200)
Subject: xen/domain: check IOMMU options doesn't contain unknown bits set
X-Git-Tag: 4.15.0-rc1~698
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=59b27f360e3d9dc0378c1288e67a91fa41a77158;p=xen.git

xen/domain: check IOMMU options doesn't contain unknown bits set

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 8cfa2e0b6b..c4a480fa14 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -310,6 +310,12 @@ static int sanitise_domain_config(struct xen_domctl_createdomain *config)
         return -EINVAL;
     }
 
+    if ( config->iommu_opts & ~XEN_DOMCTL_IOMMU_no_sharept )
+    {
+        dprintk(XENLOG_INFO, "Unknown IOMMU options %#x\n", config->iommu_opts);
+        return -EINVAL;
+    }
+
     if ( !(config->flags & XEN_DOMCTL_CDF_iommu) && config->iommu_opts )
     {
         dprintk(XENLOG_INFO,