From: Alex Williamson <alex.williamson@hp.com>
Date: Sun, 30 Dec 2007 19:53:54 +0000 (-0700)
Subject: [IA64] Fix XEN_DOMCTL_shadow_op. it should check copy_to_guest() return value.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14445^2~76
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=cb01185e0e63ae1191771b13fba9cdffe8b9afd0;p=xen.git

[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@valinux.co.jp>
---

diff --git a/xen/arch/ia64/xen/dom0_ops.c b/xen/arch/ia64/xen/dom0_ops.c
index a37eef1e83..438796c0cf 100644
--- a/xen/arch/ia64/xen/dom0_ops.c
+++ b/xen/arch/ia64/xen/dom0_ops.c
@@ -168,7 +168,8 @@ long arch_do_domctl(xen_domctl_t *op, XEN_GUEST_HANDLE(xen_domctl_t) u_domctl)
         {
             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;