linux-kernel - [PATCH] kvm: irqchip: fix memory leak

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Date:	Wed,  2 Sep 2015 12:33:53 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Gleb Natapov <gleb@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH] kvm: irqchip: fix memory leak

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

diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
index 21c1424..c63e54f 100644
--- 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;
 	}
 
-- 
1.9.1

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