From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file

---
 kernel/net/ipv6/icmp.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/kernel/net/ipv6/icmp.c b/kernel/net/ipv6/icmp.c
index fd1f896..d01165b 100644
--- a/kernel/net/ipv6/icmp.c
+++ b/kernel/net/ipv6/icmp.c
@@ -429,7 +429,10 @@
 	if (unlikely(dev->ifindex == LOOPBACK_IFINDEX || netif_is_l3_master(skb->dev))) {
 		const struct rt6_info *rt6 = skb_rt6_info(skb);
 
-		if (rt6)
+		/* The destination could be an external IP in Ext Hdr (SRv6, RPL, etc.),
+		 * and ip6_null_entry could be set to skb if no route is found.
+		 */
+		if (rt6 && rt6->rt6i_idev)
 			dev = rt6->rt6i_idev->dev;
 	}
 

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