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 565232D3EEE; Wed, 25 Feb 2026 06:58:50 +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=1772002730; cv=none; b=cjTFi/AotXV+WM9ZQbMDVa3StNHt46zZEMenDVxApoEalLOa1JV6Cub8QdynjMH8HS1NHOjHWotYXUrKlGYm16ynlhlAqlkhJP3Qxgriz66RsUd26IcRF2vFmkn+uq4f0+wp42FeQbERCUA1zjHLHLVgvGlPEI0bRvEpmeYIhrA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002730; c=relaxed/simple; bh=8eIvQBDzGAYabG3K+Ytjt7XNFtUNgo6aUAbf+NPyGXI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=paS/3I07Pkb6ktRyoZ78QCMx97faimm4Xo4rGNk1j75EmXRPXdWI+yFLFSdEHs6PxqIIunBvFuEvroTvSaA5+82X2qbiN15/96qSBnD4Yczr0FOdfUHkSFv1sXIQJvwGkMIq/L7bwKU4v7kn6HMJbWnqrRODpuqHbEmarQrsygA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GSBb3rJF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="GSBb3rJF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3017BC116D0; Wed, 25 Feb 2026 06:58:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1772002730; bh=8eIvQBDzGAYabG3K+Ytjt7XNFtUNgo6aUAbf+NPyGXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GSBb3rJFOK4BEoDfhg9V2qpix0CrniKIfcALCpJ1vMzQXFJ4A4lxd+9xHiU46Fd6M eKWDWVja5UYYyyEVw02VroCfrFwxlYyx2xHMnJiL1Acl9DwU1nRW0oPbHe0YvVe4ty JBpt2XU+tGT1ybEp7Bj8VzS8rjD1b77X1N9ONYls= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso , Florian Westphal , Sasha Levin Subject: [PATCH 6.18 543/641] net: remove WARN_ON_ONCE when accessing forward path array Date: Tue, 24 Feb 2026 17:24:29 -0800 Message-ID: <20260225012401.688543837@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ 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 5b536860138d1..ff70c902a4196 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -738,7 +738,7 @@ 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