From 66b16d12d89e04b37ddd7aa48668e0f8568d57b6 Mon Sep 17 00:00:00 2001
From: Nicolas Williams <nico@twosigma.com>
Date: Wed, 21 Dec 2022 22:46:07 -0600
Subject: [PATCH] roken: Use calloc() for overflow det. in hex_encode

Using calloc() means setting errno on overflow instead of not.
---
 lib/roken/hex.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/lib/roken/hex.c b/lib/roken/hex.c
index cc47fa4d5..5cd202603 100644
--- a/lib/roken/hex.c
+++ b/lib/roken/hex.c
@@ -58,13 +58,7 @@ hex_encode(const void *data, size_t size, char **str)
     size_t i;
     char *p;
 
-    /* check for overflow */
-    if (size * 2 < size) {
-        *str = NULL;
-	return -1;
-    }
-
-    p = malloc(size * 2 + 1);
+    p = calloc(size + 1, 2);
     if (p == NULL) {
         *str = NULL;
 	return -1;