[Xen-changelog] [xen-unstable] 32-on-64: Fix error path from memory_op() hypercall.

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

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1182343102 -3600
# Node ID 07be0266f6d88f2a8343b54f36301f3adac88d18
# Parent  50358c4b37f4fcaac1061f1c84a865932401c1be
32-on-64: Fix error path from memory_op() hypercall.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 xen/common/compat/memory.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletion(-)

diff -r 50358c4b37f4 -r 07be0266f6d8 xen/common/compat/memory.c
--- a/xen/common/compat/memory.c        Wed Jun 20 11:50:16 2007 +0100
+++ b/xen/common/compat/memory.c        Wed Jun 20 13:38:22 2007 +0100
@@ -258,7 +258,8 @@ int compat_memory_op(unsigned int cmd, X
                     compat_pfn_t pfn = nat.rsrv->extent_start.p[start_extent];
 
                     BUG_ON(pfn != nat.rsrv->extent_start.p[start_extent]);
-                    if ( __copy_to_compat_offset(cmp.rsrv.extent_start, 
start_extent, &pfn, 1) )
+                    if ( __copy_to_compat_offset(cmp.rsrv.extent_start,
+                                                 start_extent, &pfn, 1) )
                     {
                         if ( split >= 0 )
                         {
@@ -275,6 +276,10 @@ int compat_memory_op(unsigned int cmd, X
                         break;
                     }
                 }
+
+                /* Bail if there was an error. */
+                if ( (split >= 0) && (end_extent != nat.rsrv->nr_extents) )
+                    split = 0;
             }
             else
                 start_extent = end_extent;

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