init: have set_debug() check for NULL optarg

[fio.git] / init.c

diff --git a/init.c b/init.c
index 353cc2b1743f945d2ab23c2ffaad35fe290344c7..0100da213a2420db2487b24979895b4c68468455 100644 (file)
--- a/init.c
+++ b/init.c
@@ -1899,6 +1899,9 @@ static int set_debug(const char *string)
        char *opt;
        int i;
 
+       if (!string)
+               return 0;
+
        if (!strcmp(string, "?") || !strcmp(string, "help")) {
                log_info("fio: dumping debug options:");
                for (i = 0; debug_levels[i].name; i++) {