[Xen-devel] [PATCH] Minor fix to the fast emulation patch.

["Gianluca Guida" <gianluca.guida@xxxxxxxxxxxxx>]

Hello,

The fast emulation path patch introduced a bug when we have an event
injection during a write to a pagetable: after removing shadows we
still jump to the done label, releasing the lock even if we aren't
grabbing it.

Inline patch fixes this.

Signed-off-by: Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx>

diff -r 8848d9e07584 xen/arch/x86/mm/shadow/multi.c
--- a/xen/arch/x86/mm/shadow/multi.c    Mon Feb 18 21:26:57 2008 +0000
+++ b/xen/arch/x86/mm/shadow/multi.c    Tue Feb 19 00:20:00 2008 +0000
@@ -3020,7 +3020,7 @@ static int sh_page_fault(struct vcpu *v,
                      "injection: cr2=%#lx, mfn=%#lx\n", 
                      va, mfn_x(gmfn));
             sh_remove_shadows(v, gmfn, 0 /* thorough */, 1 /* must succeed */);
-            goto done;
+            return EXCRET_fault_fixed;
         }
     }
 

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