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 22FEF264A86; Mon, 23 Mar 2026 14:48:46 +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=1774277327; cv=none; b=V7jqe2xyGaNFZCiz+LNJFyP6SqYzXe394jdLMbnOiQl9IqXfk/ABx6X1i1SDeRIbhPlA429whltPEtRoYYFuAQmMTje17v8+xIe0yFBc8kHga5Ksnc29V0NHX71rlRSBWQHFhXA+rQ8tuQSzYbSFAWdpWAS2DAGov4CqjIg1QII= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774277327; c=relaxed/simple; bh=90tVMNW0P2hgMevGrE/jsRMMu66sSIJ41msPIvV3M8Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E1/O4vpNLRYhI1/Ja1l6u2V6yEyBtWf6SauilAYCS0iihkNNzrMgRN0FH16EhbSryA1UCFUMSRgfUlwcpkxb+B7MV7+Yr9r13PTEREpVxx42vip+WfKAfqXwM+emKI22rkLfiOTzzIH4q+UWhFeL6UGf4ZUBX+TBqUKtY+bNiGw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lVRGjJAr; 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="lVRGjJAr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AB04C4CEF7; Mon, 23 Mar 2026 14:48:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774277326; bh=90tVMNW0P2hgMevGrE/jsRMMu66sSIJ41msPIvV3M8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lVRGjJArHu5FubKdH9yDNpPz53mV9SNdi71ZijFm5U6J5lHezUuRvaVQATDK+cQdk twJgb4rnPjEFMeyOo/AazljIvSrdVqJ9jiMdY1Js8m4I77dw+VFmyGNf5S5/XmoMTb JYS/T9QX+r3nqWNIjrKSjrC+pDcxIKKw4bhjjLKw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Christian Eggers , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 6.12 381/460] Bluetooth: LE L2CAP: Disconnect if sum of payload sizes exceed SDU Date: Mon, 23 Mar 2026 14:46:17 +0100 Message-ID: <20260323134535.934208171@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134526.647552166@linuxfoundation.org> References: <20260323134526.647552166@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christian Eggers [ Upstream commit b6a2bf43aa37670432843bc73ae2a6288ba4d6f8 ] Core 6.0, Vol 3, Part A, 3.4.3: "... If the sum of the payload sizes for the K-frames exceeds the specified SDU length, the receiver shall disconnect the channel." This fixes L2CAP/LE/CFC/BV-27-C (running together with 'l2test -r -P 0x0027 -V le_public'). Fixes: aac23bf63659 ("Bluetooth: Implement LE L2CAP reassembly") Signed-off-by: Christian Eggers Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- net/bluetooth/l2cap_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index de8e18fe50557..560a17d36f7fa 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -6686,6 +6686,7 @@ static int l2cap_ecred_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) if (chan->sdu->len + skb->len > chan->sdu_len) { BT_ERR("Too much LE L2CAP data received"); + l2cap_send_disconn_req(chan, ECONNRESET); err = -EINVAL; goto failed; } -- 2.51.0