From 91c9a1f1f26b1800e1d1d1cd7d814d3e2d14f822 Mon Sep 17 00:00:00 2001
From: Davide Caratti <dcaratti@redhat.com>
Date: Wed, 6 Jul 2016 18:41:37 +0200
Subject: [PATCH] utils: fix hex digits parsing in hexstring_a2n()

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1300765
Upstream Status: iproute2.git commit 9ba4126dc4d6

commit 9ba4126dc4d6abb8dc5c8c8d52177849e764a14e
Author: Beniamino Galvani <bgalvani@redhat.com>
Date:   Tue Jun 14 22:55:17 2016 +0200

    utils: fix hex digits parsing in hexstring_a2n()

    strtoul() only modifies errno on overflow, so if errno is not zero
    before calling the function its value is preserved and makes the
    function fail for valid inputs; initialize it.

    Signed-off-by: Beniamino Galvani <bgalvani@redhat.com>

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
---
 lib/utils.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/utils.c b/lib/utils.c
index dedadff..b310166 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -834,6 +834,7 @@ __u8 *hexstring_a2n(const char *str, __u8 *buf, int blen, unsigned int *len)
 
 		strncpy(tmpstr, str, 2);
 		tmpstr[2] = '\0';
+		errno = 0;
 		tmp = strtoul(tmpstr, &endptr, 16);
 		if (errno != 0 || tmp > 0xFF || *endptr != '\0')
 			return NULL;
-- 
1.8.3.1