From: Jouni Malinen <j@w1.fi>
Date: Sat, 22 Jun 2019 15:42:53 +0000 (+0300)
Subject: libtommath: Make sure fast_s_mp_mul_digs initializes the W[] array
X-Git-Tag: hostap_2_9~141
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1e203c8005f4807992df87a79dde01e8c11c8b8;p=thirdparty%2Fhostap.git

libtommath: Make sure fast_s_mp_mul_digs initializes the W[] array

Some compilers have started to warn about this and the use of two loops
with ix 0..pa-1 and 0..pa loop a bit suspicious, so better make sure the
array is initialized with zeros before extracting the terms from it.

Signed-off-by: Jouni Malinen <j@w1.fi>
---

diff --git a/src/tls/libtommath.c b/src/tls/libtommath.c
index 4f7a14823..715674424 100644
--- a/src/tls/libtommath.c
+++ b/src/tls/libtommath.c
@@ -2441,6 +2441,7 @@ static int fast_s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
 
   /* clear the carry */
   _W = 0;
+  os_memset(W, 0, sizeof(W));
   for (ix = 0; ix < pa; ix++) {
       int      tx, ty;
       int      iy;