From a174c791ece5d7f2869e9efd338d91c8ea10f609 Mon Sep 17 00:00:00 2001
From: David Decotigny <ddecotig@gmail.com>
Date: Thu, 24 May 2018 08:30:16 -0700
Subject: [PATCH] udhcpc6: ignore invalid OPTION_IAADDR

Signed-off-by: David Decotigny <ddecotig@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 networking/udhcp/d6_dhcpc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c
index 9e3ce8b1c..2ff9c5669 100644
--- a/networking/udhcp/d6_dhcpc.c
+++ b/networking/udhcp/d6_dhcpc.c
@@ -287,6 +287,10 @@ static void option_to_env(uint8_t *option, uint8_t *option_end)
  * |                        valid-lifetime                         |
  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  */
+			/* Make sure payload contains an address */
+			if (option[3] < 24)
+				break;
+
 			sprint_nip6(ipv6str, option + 4);
 			*new_env() = xasprintf("ipv6=%s", ipv6str);