From 8fe567b86f96555ba27ab421db58f175b63a64db Mon Sep 17 00:00:00 2001
From: Erik Ekman <erik@kryo.se>
Date: Tue, 30 Jun 2020 01:25:49 +0200
Subject: [PATCH] ip6: Fix incorrect assert in ip6_frag()

New test case now passes.

Fixes bug #57374 (Found by Hiromasa Ito).
---
 src/core/ipv6/ip6_frag.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/ipv6/ip6_frag.c b/src/core/ipv6/ip6_frag.c
index d6c5d223..8b352f56 100644
--- a/src/core/ipv6/ip6_frag.c
+++ b/src/core/ipv6/ip6_frag.c
@@ -781,7 +781,7 @@ ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
       return ERR_MEM;
     }
     LWIP_ASSERT("this needs a pbuf in one piece!",
-                (p->len >= (IP6_HLEN)));
+                (rambuf->len >= (IP6_HLEN)));
     SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
     ip6hdr = (struct ip6_hdr *)rambuf->payload;
     frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);