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 03888348C5E; Sat, 30 May 2026 18:00:36 +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=1780164036; cv=none; b=r8m5oPCKeI3yTfI3f958u1zOgvUUz3NXECCY3bjy5FSQtZl2Vs98MOzWtoRXCQSm3nEfvReRrihLTX+i+URHcpvD1OwkdDO23nOUEuiqyq1KMQCB4QLPXArdLRAWPF4IzPLioQ81pAl2GxGW4lc+j9k2gFztrA/unGaneB8nXXY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164036; c=relaxed/simple; bh=L/2Hq873Qp9O+oUYcbpLr4KQZifM5INr84tuM+7Fd1s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FQIjsgJfe8Vm2iZ5kyjiOA1rcLrUU3HB2aXNFBcszkZXESwtGVIjFmGm+JnRkMPDi72TXhI0iPBF00Wf6QacPFZVt9XmBdMW4G/K4ZOMMIr/3XmBKYhy0/t0DLpIdVba9Fw1sE6PFNbAbJ/WUXhIHB+KfFWS0MvrwYVOnHsQCLA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=niG8oOZA; 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="niG8oOZA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 466F81F00893; Sat, 30 May 2026 18:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780164035; bh=YTz/5Qrrt/WZWPOwp9kvRpWHP7Q9KGTLy5m/JCy/efQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=niG8oOZAzZEs+kCfxYrV8cFitsxSHfE4ua4I3zEApYP5oNQAXzvGrucykrt708nUk sMsS2IVgIJ89lj/Jeoy/kE6AJ4NaaHcaZMeldMyEIE3s31F1aI2zTYqU9OOtJyJ5xk 5WfWSInnxzRT7fVOZhwimGQ/vtEehCZiSv/Ni1+A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xin Long , Marcelo Ricardo Leitner , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 428/776] sctp: fix missing encap_port propagation for GSO fragments Date: Sat, 30 May 2026 18:02:22 +0200 Message-ID: <20260530160251.508754167@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: Xin Long [ Upstream commit bf6f95ae3b8b2638c0e1d6d802d50983ce5d0f45 ] encap_port in SCTP_INPUT_CB(skb) is used by sctp_vtag_verify() for SCTP-over-UDP processing. In the GSO case, it is only set on the head skb, while fragment skbs leave it 0. This results in fragment skbs seeing encap_port == 0, breaking SCTP-over-UDP connections. Fix it by propagating encap_port from the head skb cb when initializing fragment skbs in sctp_inq_pop(). Fixes: 046c052b475e ("sctp: enable udp tunneling socks") Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Link: https://patch.msgid.link/ea65ed61b3598d8b4940f0170b9aa1762307e6c3.1776017631.git.lucien.xin@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/sctp/inqueue.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c index 6a434d441dc70..6dfbd35d916d4 100644 --- a/net/sctp/inqueue.c +++ b/net/sctp/inqueue.c @@ -195,6 +195,7 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) cb->chunk = head_cb->chunk; cb->af = head_cb->af; + cb->encap_port = head_cb->encap_port; } } -- 2.53.0