1 files changed, 13 insertions, 0 deletions
diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index eb0070437f..7be7226bc0 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -118,6 +118,19 @@ static FuzzTarget *fuzz_get_target(char* name)
 }
 
 
+/* Sometimes called by libfuzzer to mutate two inputs into one */
+size_t LLVMFuzzerCustomCrossOver(const uint8_t *data1, size_t size1,
+                                 const uint8_t *data2, size_t size2,
+                                 uint8_t *out, size_t max_out_size,
+                                 unsigned int seed)
+{
+    if (fuzz_target->crossover) {
+        return fuzz_target->crossover(data1, size1, data2, size2, out,
+                                      max_out_size, seed);
+    }
+    return 0;
+}
+
 /* Executed for each fuzzing-input */
 int LLVMFuzzerTestOneInput(const unsigned char *Data, size_t Size)
 {