From 6d7fd3328a2ffe42ef52f914d913f1ee4d290adc Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 3 Apr 2020 18:50:09 +0200
Subject: [PATCH] fix #6157

---
 src/util/strings.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/util/strings.c b/src/util/strings.c
index be2ec33dc..9510b3b3b 100644
--- a/src/util/strings.c
+++ b/src/util/strings.c
@@ -972,14 +972,14 @@ GNUNET_STRINGS_string_to_data (const char *enc,
                                void *out,
                                size_t out_size)
 {
-  unsigned int rpos;
-  unsigned int wpos;
+  size_t rpos;
+  size_t wpos;
   unsigned int bits;
   unsigned int vbit;
   int ret;
   int shift;
   unsigned char *uout;
-  unsigned int encoded_len = out_size * 8;
+  size_t encoded_len;
 
   if (0 == enclen)
   {
@@ -987,6 +987,8 @@ GNUNET_STRINGS_string_to_data (const char *enc,
       return GNUNET_OK;
     return GNUNET_SYSERR;
   }
+  GNUNET_assert (out_size < SIZE_MAX / 8);
+  encoded_len = out_size * 8;
   uout = out;
   wpos = out_size;
   rpos = enclen;
-- 
2.25.1