mhash: fix empty input string problem with division by 0

1 files changed, 1 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index 8bd8448..7a57d38 100644
--- a/src/util.c
+++ b/src/util.c
@@ -52,6 +52,7 @@ mhash(const char *str, int len)
 	/* VULN #2: BUFFER OVERFLOW */
 	/* see documentation/README.md for more details */
 
+	if (!str || !*str) str = ".";
 	if (len == -1) len = strlen(str);
 
 	for (v = 0, i = 0; i < len; i++) v += str[i];