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diff --git a/tools/coverity.c b/tools/coverity.c
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+/* Coverity Scan model
+*
+* Copyright (C) 2014 Red Hat, Inc.
+*
+* Authors:
+* Markus Armbruster <armbru@redhat.com>
+* Paolo Bonzini <pbonzini@redhat.com>
+*
+* This work is licensed under the terms of the GNU GPL, version 2 or, at your
+* option, any later version. See the COPYING file in the top-level directory.
+*/
+/*
+* This is the source code for our Coverity user model file. The
+* purpose of user models is to increase scanning accuracy by explaining
+* code Coverity can't see (out of tree libraries) or doesn't
+* sufficiently understand. Better accuracy means both fewer false
+* positives and more true defects. Memory leaks in particular.
+*
+* - A model file can't import any header files. Some built-in primitives are
+* available but not wchar_t, NULL etc.
+* - Modeling doesn't need full structs and typedefs. Rudimentary structs
+* and similar types are sufficient.
+* - An uninitialized local variable signifies that the variable could be
+* any value.
+*
+* The model file must be uploaded by an admin in the analysis settings of
+* https://scan.coverity.com/projects/54
+*
+* above text is based on https://github.com/qemu/qemu/blob/master/scripts/coverity-model.c
+*/
+
+#define NULL (void *)0
+
+// Based on https://scan.coverity.com/models
+void *av_malloc(size_t size) {
+    int has_memory;
+    __coverity_negative_sink__(size);
+    if(has_memory)
+        return __coverity_alloc__(size);
+    else
+        return 0;
+}