mangle: minimum mangled file size is 1

1 files changed, 6 insertions, 0 deletions

diff --git a/mangle.c b/mangle.c
index ed742dfa..13e5c00f 100644
--- a/mangle.c
+++ b/mangle.c
@@ -539,6 +539,12 @@ void mangle_mangleContent(honggfuzz_t * hfuzz, fuzzer_t * fuzzer)
         return;
     }
 
+    /* Minimum support file size for mangling is 1 */
+    if (fuzzer->dynamicFileSz == 0UL) {
+        fuzzer->dynamicFileSz = 1UL;
+        fuzzer->dynamicFile[0] = '\0';
+    }
+
     /* 20% chance to change the file size */
     if ((util_rnd64() % 5) == 0) {
         mangle_Resize(hfuzz, fuzzer);