num2str(): Fix overflow handling

[fio.git] / lib / num2str.c

diff --git a/lib/num2str.c b/lib/num2str.c
index 923e21d9ce9abc321aa1fb07c67ee9506b174383..7f628d29a05121167f147de03700524e67205c31 100644 (file)
--- a/lib/num2str.c
+++ b/lib/num2str.c
@@ -80,14 +80,14 @@ char *num2str(uint64_t num, int maxlen, int base, int pow2, enum n2s_unit units)
                post_index++;
        }
 
+       if (post_index >= ARRAY_SIZE(sistr))
+               post_index = 0;
+
        /*
         * If no modulo, then we're done.
         */
        if (modulo == -1U) {
 done:
-               if (post_index >= ARRAY_SIZE(sistr))
-                       post_index = 0;
-
                if (asprintf(&buf, "%llu%s%s", (unsigned long long) num,
                             unitprefix[post_index], unitstr[units]) < 0)
                        buf = NULL;