From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Tue, 17 Feb 2026 11:56:39 +0000 (+0100)
Subject: net: remove WARN_ON_ONCE when accessing forward path array
X-Git-Tag: v7.0-rc1~44^2~8^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=008e7a7c293b30bc43e4368dac6ea3808b75a572;p=thirdparty%2Fkernel%2Flinux.git

net: remove WARN_ON_ONCE when accessing forward path array

Although unlikely, recent support for IPIP tunnels increases chances of
reaching this WARN_ON_ONCE if userspace manages to build a sufficiently
long forward path.

Remove it.

Fixes: ddb94eafab8b ("net: resolve forwarding path from virtual netdevice and HW destination address")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 96f89eb797e8..096b3ff13f6b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -744,7 +744,7 @@ static struct net_device_path *dev_fwd_path(struct net_device_path_stack *stack)
 {
 	int k = stack->num_paths++;
 
-	if (WARN_ON_ONCE(k >= NET_DEVICE_PATH_STACK_MAX))
+	if (k >= NET_DEVICE_PATH_STACK_MAX)
 		return NULL;
 
 	return &stack->path[k];