From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D438939B974 for ; Sat, 28 Feb 2026 18:17:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302639; cv=none; b=bDgE3pajwbUluDRg6RbIfBQYAt2X0k3SV5wRNce+sejD2IuAE8YxComQfx7tT4XU9RTApGn+GMrNN7qVfM/l1GMEw3D2VkjaSZAD5+nxQa6E/MZL/nTBn2nnVL+o1VVKbnPXdacTWSw2HSBjg+0e8+5eeHbTP6+QHqmEUN+IZHQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302639; c=relaxed/simple; bh=nystGe1yVUUM/j2rbGNIkv8mPybE0O/ohdiygyxb+4Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ieSKOZ/igIaE4udWwGVQlUDQ92afbj68y+HoKjMbXUv2G1aR5QPj5YE3aRAqrwrF2m7+uJkCK+MQ5GQnYFR18ci250k2eH4k2XOlmJBrC+Dn038htTtZwrp+xsJIP/1DbvyYXtMb5rkXBUG5t/oshxcR1aoJaHuuJ3iI55i0tgc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MWGWf/DB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MWGWf/DB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43F6BC19423; Sat, 28 Feb 2026 18:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302639; bh=nystGe1yVUUM/j2rbGNIkv8mPybE0O/ohdiygyxb+4Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MWGWf/DBvijrOxdEAnuUtLwKnT5L5ClWWwhTltIBpEW+lIDVMd6itR3vlmHPDYYCF k52Q5B9Y4z1wIy5qNumzBDU/FP7P3Cq3TjnrOsT9gZUeOrDDq6bOg0bVHzYmxA1bsO MJie70yytqA6gywuTM9q9AWaWsJDKc0nBh62V/jEtuEAwabGX2+bCgHQXzCLqMXbzV r90NhKIxlDX1NFobfAxueES+On+jdNjYc9Qsr8eMMqlpBlQX4+OLLpNXx7JPeq2kbz mU6t9QbomX6ihBnLX9cIg5ZhphMFtn6a0pI9uwjDsYVQmjhq9nTGXTAjST6N3Zn2Nr nseOi4Z3DbrQA== From: Sasha Levin To: patches@lists.linux.dev Cc: Pablo Neira Ayuso , Florian Westphal , Sasha Levin Subject: [PATCH 5.15 161/164] net: remove WARN_ON_ONCE when accessing forward path array Date: Sat, 28 Feb 2026 13:15:00 -0500 Message-ID: <20260228181505.1600663-161-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228181505.1600663-1-sashal@kernel.org> References: <20260228181505.1600663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Pablo Neira Ayuso [ Upstream commit 008e7a7c293b30bc43e4368dac6ea3808b75a572 ] 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 Signed-off-by: Florian Westphal Signed-off-by: Sasha Levin --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/dev.c b/net/core/dev.c index 977146a70b8c1..48abe997e6f3b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -750,7 +750,7 @@ 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]; -- 2.51.0