[Xen-devel] [PATCH] Fix bug1706

["Wei, Gang" <gang.wei@xxxxxxxxx>]

Here is fix for bug 1706.

ROOT-CAUSE:
In the end of domain_destroy fn, call_rcu(&d->rcu, complete_domain_destroy) 
make it possible that complete_domain_destroy fn be executed in different vcpu 
context. So the IS_PRIV_FOR check in unmap_domain_pirq fn is not suitable. In 
fact, all necessary privilege checks have already been done in the start of 
hypercalls, we need only simply remove this check from unmap_domain_pirq.

Signed-off-by: Wei Gang <gang.wei@xxxxxxxx>

diff -r d1631540bcc4 xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c        Tue Jan 18 17:23:24 2011 +0000
+++ b/xen/arch/x86/irq.c        Thu Jan 27 20:53:28 2011 +0800
@@ -1567,9 +1567,6 @@ int unmap_domain_pirq(struct domain *d, 
     if ( (pirq < 0) || (pirq >= d->nr_pirqs) )
         return -EINVAL;
 
-    if ( !IS_PRIV_FOR(current->domain, d) )
-        return -EINVAL;
-
     ASSERT(spin_is_locked(&pcidevs_lock));
     ASSERT(spin_is_locked(&d->event_lock));

Jimmy

bug1706-fix.patch
Description: bug1706-fix.patch

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