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-rw-r--r--tests/libqos/malloc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/libqos/malloc.c b/tests/libqos/malloc.c
index 82b9df537a..19d05cafa6 100644
--- a/tests/libqos/malloc.c
+++ b/tests/libqos/malloc.c
@@ -270,6 +270,10 @@ uint64_t guest_alloc(QGuestAllocator *allocator, size_t size)
     uint64_t rsize = size;
     uint64_t naddr;
 
+    if (!size) {
+        return 0;
+    }
+
     rsize += (allocator->page_size - 1);
     rsize &= -allocator->page_size;
     g_assert_cmpint((allocator->start + rsize), <=, allocator->end);