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 D93BB347FDF for ; Sat, 28 Feb 2026 18:14:38 +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=1772302478; cv=none; b=tYl3pCJtzj5HLGqspX0S3IQ1i+lKWA8XHfOHHgoW4/CU/+INsC3bEgjUJABZMFYHPDLWPB6mAIutkGocdLATX0xZ9klwoEuMQfQiIm0GmopdvpbSVfrExRLNNRUVdJ98+Z5xC6yZHtiJQrsiZHfJTMMZIanoku0HSULe0c/fGCg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302478; c=relaxed/simple; bh=155nKOQ0dC7gn/DvlenXg00raW5HYmF2bQiFVsSTrSE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t9NDaeQfxMZEA0tN+z71+zuZxOaxSbdbqqUVcVVajgnsPpO5xBhWMhwuYF7maSHc29x19+i6moSfOG1u60PoofZUORSXRt17ffM4Qqo7pxJbWF9dOt1Gnof/BF+nZWUChRv4B6gSjgWMhVCN0IyiUZ0Fiiqn41oiL/VgCGASnv8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IHCzEe/T; 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="IHCzEe/T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46DABC116D0; Sat, 28 Feb 2026 18:14:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302478; bh=155nKOQ0dC7gn/DvlenXg00raW5HYmF2bQiFVsSTrSE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IHCzEe/TGxTVESvpxo2eTRWuhnEKckAx+yeigrDaizuYmwZDXHm9u2lkdtN0bHSe3 4ucWEDkOsKNZDELiP/Pijukny/VvX+oCOqUVlPNOr4kx1EJf7FtLmVd+l3t0yaKssQ 1++0M1YIXKLWEepLP2/xZV/EZazl7Z192s6kFZAMGHI8jVWHrm2MaZ1nTegvMutIKd NZ0fuQuNOFsiVJNUnX4E9RXeI7kVR5ut2vnMgsy5EKn/JUY+R29i2PmQucAIuK6qw6 sRh+ouheOIs2ro1Ij7MKIUKl96n4TZjqx25uqNvWUJDvxRp43Ow5EUJu2zUF7QtoI/ MJ0YYpKlwll/w== From: Sasha Levin To: patches@lists.linux.dev Cc: Pablo Neira Ayuso , Florian Westphal , Sasha Levin Subject: [PATCH 6.1 225/232] net: remove WARN_ON_ONCE when accessing forward path array Date: Sat, 28 Feb 2026 13:11:18 -0500 Message-ID: <20260228181127.1592657-225-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228181127.1592657-1-sashal@kernel.org> References: <20260228181127.1592657-1-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 69bb7ac73d047..c2ca0b45bd37d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -695,7 +695,7 @@ 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