X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=lib%2Fnum2str.c;h=896186888716424f13ecf0dc174a416cffeb7bd6;hb=1b10477b21157800f030c3ec91511a810e75e4c7;hp=a1041926c5e5aff50dc540227a89d9d76d17dfc6;hpb=22f80458a520d0c5371c64bf91d24cdd21dff825;p=fio.git

diff --git a/lib/num2str.c b/lib/num2str.c
index a1041926..89618688 100644
--- a/lib/num2str.c
+++ b/lib/num2str.c
@@ -2,6 +2,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "../fio.h"
+
+#define ARRAY_LENGTH(arr)	sizeof(arr) / sizeof((arr)[0])
+
 /*
  * Cheesy number->string conversion, complete with carry rounding error.
  */
@@ -44,6 +48,9 @@ char *num2str(unsigned long num, int maxlen, int base, int pow2, int unit_base)
 
 	if (modulo == -1U) {
 done:
+		if (post_index >= ARRAY_LENGTH(postfix))
+			post_index = 0;
+
 		sprintf(buf, "%lu%s%s", num, postfix[post_index],
 			byte_postfix[byte_post_index]);
 		return buf;