From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E1075346E55; Sat, 30 May 2026 17:51:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163472; cv=none; b=KqJhp/eJOBbWAy0A8AUvGH6b3s0A6Wx1YHmZ34e3WnrVeW5JnItehCBeVFrwkfbV8PPXuCKHHCTUUKopHYdL7prUY2NciLAEJmebFlnus8xVWIw2jrjp7cKbhibr2pmZ9kcHgqSJBkLlnTHL1zKiZuxQJoD4o0VbsoE66jKNkUc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163472; c=relaxed/simple; bh=L1aM0EQthvp8wXuTFeVHObPcaQt6w/Kp0NGHMBScF4o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QJAeYPBAUrncliolF1CVD+lftXl1Pi4xCTtwJlXWH9WDJ6DWvtyzASXkMNHDNWl86Fko4Z7G0UlD5wBByr6l794M1ADHEhSDBF9fWWRKv+bqb2OJmCJk+3MhsS0nGnzcLWmlWu+QzjvaGRPLSeEnTPAagKqvgpkICknLXMPo15k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YXq3+vLw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="YXq3+vLw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 310BA1F00893; Sat, 30 May 2026 17:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163471; bh=YBgaxTmuRwBsN8m6nOKuv+GpY8OGuQNlC6BjjENZERs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YXq3+vLwq/qg3y/6BoL+XdGL+rETPSL+SkLVC4G4XZUWB4anNwUuzLEF8XIzK/NDN fHScxeZZbJPpSxv2IhOidCaq4yP0fyzVUomDMR4zsZvvDS+IfmoI6ox/T9kB6VMt2r 4/j3OSqfkFgz416LztkFTEEvQHbCLLambm/Wbf/4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andrea Mayer , Justin Iurman , Jakub Kicinski Subject: [PATCH 5.15 261/776] seg6: fix seg6 lwtunnel output redirect for L2 reduced encap mode Date: Sat, 30 May 2026 17:59:35 +0200 Message-ID: <20260530160247.284236802@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrea Mayer commit ade67d5f588832c7ba131aadd4215a94ce0a15c8 upstream. When SEG6_IPTUN_MODE_L2ENCAP_RED (L2ENCAP_RED) was introduced, the condition in seg6_build_state() that excludes L2 encap modes from setting LWTUNNEL_STATE_OUTPUT_REDIRECT was not updated to account for the new mode. As a consequence, L2ENCAP_RED routes incorrectly trigger seg6_output() on the output path, where the packet is silently dropped because skb_mac_header_was_set() fails on L3 packets. Extend the check to also exclude L2ENCAP_RED, consistent with L2ENCAP. Fixes: 13f0296be8ec ("seg6: add support for SRv6 H.L2Encaps.Red behavior") Cc: stable@vger.kernel.org Signed-off-by: Andrea Mayer Reviewed-by: Justin Iurman Link: https://patch.msgid.link/20260418162838.31979-1-andrea.mayer@uniroma2.it Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/ipv6/seg6_iptunnel.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -714,7 +714,8 @@ static int seg6_build_state(struct net * newts->type = LWTUNNEL_ENCAP_SEG6; newts->flags |= LWTUNNEL_STATE_INPUT_REDIRECT; - if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP) + if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP && + tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP_RED) newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT; newts->headroom = seg6_lwt_headroom(tuninfo);