[PATCH 4.2 097/110] kvm: irqchip: fix memory leak

[Greg Kroah-Hartman]

4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>

commit ba60c41ae392b473a1897faa0b8739fcb8759d69 upstream.

We were taking the exit path after checking ue->flags and return value
of setup_routing_entry(), but 'e' was not freed incase of a failure.

Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: William Dauchy <william@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 virt/kvm/irqchip.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -213,11 +213,15 @@ int kvm_set_irq_routing(struct kvm *kvm,
 			goto out;
 
 		r = -EINVAL;
-		if (ue->flags)
+		if (ue->flags) {
+			kfree(e);
 			goto out;
+		}
 		r = setup_routing_entry(new, e, ue);
-		if (r)
+		if (r) {
+			kfree(e);
 			goto out;
+		}
 		++ue;
 	}
 


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