Signed-off-by: Fam Zheng <f...@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 67f3190..c15be89 100644
--- a/tests/libqos/malloc.c
+++ b/tests/libqos/malloc.c
@@ -283,6 +283,9 @@ 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);
-- 
1.9.3


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