[Xen-changelog] Unmap domain page on exit

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User adsharma@xxxxxxxxxxxxxxxxxxxx
# Node ID 44e70a3d6b4c6eb69c1b837d6629cbfd06852ed0
# Parent  765d27ed051697f84866c391c262c4f649b7b686
Unmap domain page on exit

Signed-off-by: Yunhong Jiang <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Arun Sharma <arun.sharma@xxxxxxxxx>

diff -r 765d27ed0516 -r 44e70a3d6b4c xen/arch/x86/shadow32.c
--- a/xen/arch/x86/shadow32.c   Wed Aug 17 19:21:31 2005
+++ b/xen/arch/x86/shadow32.c   Wed Aug 17 19:21:37 2005
@@ -1917,8 +1917,10 @@
     snapshot = map_domain_page(smfn);
 
     if (__copy_from_user(&gpte, &guest_pt[index],
-                         sizeof(gpte)))
+                         sizeof(gpte))) {
+        unmap_domain_page(snapshot);
         return 0;
+    }
 
     // This could probably be smarter, but this is sufficent for
     // our current needs.

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