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 9B08538F64D; Sat, 12 Sep 2026 18:14:52 +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=1789236893; cv=none; b=s16m/QUrYkVG36Eu6xjHQWkfHZljpNYfnl0NFF71VJN+k5BlKURR6g7GhB2Pv4X+PqsYcznZPfGeUd96McA3VyyhWBV2UZjnEFyxLzcgtvUbeWAqrM56mJxpyimxtSb12wM403UtVfmDk6wgttiL33ZvkO/7i6/3lrHehb9oZ2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789236893; c=relaxed/simple; bh=UQ89HjdULC45PRO+UJ7FbilsrQdBhDx7qQwH/FoXGd0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B0ufNvL8+11z546MKCbfHK2O+6Bofi745vQgQ4VkQmiAiNAAbp1H4asCropXZXiZlZ7Z0dHgRGoB5105IfqMfpmMJ6DqA531sBvmqkfniIlO3eJU7zUtC7Noa03rXBALM9ynMjliKRet5ya4yLhx1FX5/7MonNyvuosYZLy378E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=euRcbzCz; 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="euRcbzCz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FE401F000FF; Sat, 12 Sep 2026 18:14:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789236892; bh=FeoPdUOOYbM64hF3NRCpTHxp9JaENQouLZlY6iBXrQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=euRcbzCzvqsFuo1SnE68gMC+ivISQLgMl6kg667kL5Khnq/c3/yViN0ceHjyAQR4u ABViy39j6A0hpsN9XsJt2Yveonq+HGumkI7DB9XxmUPxOvbskT9yiLjLbM7oFNGP0Q cOMYUZxyzNv5XWn0qmy/GPRUOrECf4PKR6g6U8wI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, Simon Horman , Xin Long , Jun Yang , Paolo Abeni Subject: [PATCH 5.15 148/935] sctp: distinguish sequence zero from wildcard in reconf lookup Date: Sat, 12 Sep 2026 08:52:58 +0200 Message-ID: <20260912065530.216395960@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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: Jun Yang commit 63f44178f0a0f86060c9b576d6efab8a3ffa403e upstream. Zero is a valid response sequence after strreset_outseq wraps, but sctp_chunk_lookup_strreset_param() currently treats it as a wildcard. Add match_seq so response lookups match zero exactly while the one type-only lookup can still ignore the sequence. Fixes: 50a41591f110 ("sctp: implement receiver-side procedures for the Add Outgoing Streams Request Parameter") Cc: stable@kernel.org Suggested-by: Simon Horman Acked-by: Xin Long Signed-off-by: Jun Yang Link: https://patch.msgid.link/20260824081832.98717-2-juny24602@gmail.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- net/sctp/stream.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- a/net/sctp/stream.c +++ b/net/sctp/stream.c @@ -482,7 +482,7 @@ out: static struct sctp_paramhdr *sctp_chunk_lookup_strreset_param( struct sctp_association *asoc, __be32 resp_seq, - __be16 type) + __be16 type, bool match_seq) { struct sctp_chunk *chunk = asoc->strreset_chunk; struct sctp_reconf_chunk *hdr; @@ -499,7 +499,7 @@ static struct sctp_paramhdr *sctp_chunk_ */ struct sctp_strreset_tsnreq *req = param.v; - if ((!resp_seq || req->request_seq == resp_seq) && + if ((!match_seq || req->request_seq == resp_seq) && (!type || type == req->param_hdr.type)) return param.v; } @@ -564,7 +564,7 @@ struct sctp_chunk *sctp_process_strreset if (asoc->strreset_chunk) { if (!sctp_chunk_lookup_strreset_param( asoc, outreq->response_seq, - SCTP_PARAM_RESET_IN_REQUEST)) { + SCTP_PARAM_RESET_IN_REQUEST, true)) { /* same process with outstanding isn't 0 */ result = SCTP_STRRESET_ERR_IN_PROGRESS; goto out; @@ -816,7 +816,7 @@ struct sctp_chunk *sctp_process_strreset if (asoc->strreset_chunk) { if (!sctp_chunk_lookup_strreset_param( - asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) { + asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS, false)) { /* same process with outstanding isn't 0 */ result = SCTP_STRRESET_ERR_IN_PROGRESS; goto out; @@ -927,7 +927,8 @@ struct sctp_chunk *sctp_process_strreset struct sctp_paramhdr *req; __u32 result; - req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0); + req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0, + true); if (!req) return NULL;