[Xen-changelog] [xen-unstable] [IA64] Fix XEN_DOMCTL_shadow_op. it should check copy_to_guest() return value.

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

# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1199044434 25200
# Node ID 6c0aec4604f7d1e7c2223bdaa365fb5f54fe4fc2
# Parent  3d7213deb33e863a32d10f44d1c3800a1235309b
[IA64] Fix XEN_DOMCTL_shadow_op. it should check copy_to_guest() return value.

Pointed out by Samuel Thibault.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 xen/arch/ia64/xen/dom0_ops.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -r 3d7213deb33e -r 6c0aec4604f7 xen/arch/ia64/xen/dom0_ops.c
--- a/xen/arch/ia64/xen/dom0_ops.c      Sun Dec 30 12:50:09 2007 -0700
+++ b/xen/arch/ia64/xen/dom0_ops.c      Sun Dec 30 12:53:54 2007 -0700
@@ -168,7 +168,8 @@ long arch_do_domctl(xen_domctl_t *op, XE
         {
             ret = shadow_mode_control(d, &op->u.shadow_op);
             put_domain(d);
-            copy_to_guest(u_domctl, op, 1);
+            if (copy_to_guest(u_domctl, op, 1))
+                ret = -EFAULT;
         } 
     }
     break;

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