[Xen-devel] [PATCH v1 1/2] xen/arm: vgic: Check for vgic handler to be initialized before dereferencing it

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

Since domain_vgic_free() can be called when the vgic_ops haven't been
initialised yet, always check that d->arch.vgic.handler is not a null.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
---
 xen/arch/arm/vgic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 7a4e3cd..6cf947c 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -187,7 +187,8 @@ void domain_vgic_free(struct domain *d)
         }
     }
 
-    d->arch.vgic.handler->domain_free(d);
+    if ( d->arch.vgic.handler )
+       d->arch.vgic.handler->domain_free(d);
     xfree(d->arch.vgic.shared_irqs);
     xfree(d->arch.vgic.pending_irqs);
     xfree(d->arch.vgic.allocated_irqs);
-- 
2.7.4


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