From: Keir Fraser <keir.fraser@citrix.com>
Date: Wed, 23 Jul 2008 08:58:48 +0000 (+0100)
Subject: vtd: During parsing DMAR table, if find RMRR is incorrect, return error.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14165^2~141
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=597683c799e9d53aba3d2af4758d35dd7bf437b4;p=xen.git

vtd: During parsing DMAR table, if find RMRR is incorrect, return error.

Signed-off-by: Weidong Han <weidong.han@intel.com>
---

diff --git a/xen/drivers/passthrough/vtd/dmar.c b/xen/drivers/passthrough/vtd/dmar.c
index 501622edd1..1d39575ecc 100644
--- a/xen/drivers/passthrough/vtd/dmar.c
+++ b/xen/drivers/passthrough/vtd/dmar.c
@@ -349,6 +349,12 @@ acpi_parse_one_rmrr(struct acpi_dmar_entry_header *header)
     void *dev_scope_start, *dev_scope_end;
     int ret = 0;
 
+    if ( rmrr->base_address >= rmrr->end_address )
+    {
+        dprintk(XENLOG_ERR VTDPREFIX, "RMRR is incorrect.\n");
+        return -EFAULT;
+    }
+
     rmrru = xmalloc(struct acpi_rmrr_unit);
     if ( !rmrru )
         return -ENOMEM;