From 28452758c405e16d9890c44d6031d44233e8cb38 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famz@redhat.com>
Date: Fri, 24 Apr 2015 19:35:17 +0800
Subject: [PATCH] libqos: Allow calling guest_free on NULL pointer

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tests/libqos/malloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/libqos/malloc.c b/tests/libqos/malloc.c
index 8276130..82b9df5 100644
--- a/tests/libqos/malloc.c
+++ b/tests/libqos/malloc.c
@@ -285,6 +285,9 @@ uint64_t guest_alloc(QGuestAllocator *allocator, size_t size)
 
 void guest_free(QGuestAllocator *allocator, uint64_t addr)
 {
+    if (!addr) {
+        return;
+    }
     mlist_free(allocator, addr);
     if (allocator->opts & ALLOC_PARANOID) {
         mlist_check(allocator);
-- 
2.7.4