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 00D543B3BE5; Mon, 23 Mar 2026 16:25:12 +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=1774283113; cv=none; b=QhUpQeXnQjSL2FDEdNA+JBdh3zJ5v5q270q+ClQmRTXia983ziejWUsnX1uB82uHBPNOkEweg8v+ICOXK/+3CQ2siN5h9cTsG5C24oyefpdAPyWFs0ej6vYjXgNPVopasJUaD9sGG7ARLnwPJgJOCY37+zGiQtXt4/rkuw3hj5k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774283113; c=relaxed/simple; bh=QJZe3QMmiIkWSPY6RiVr0KMc66d5lv48orwttDBcwaE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e5l8oMEPz0m1GcWxhFWmo0I1KNxDq2KEgwLRzd8gqKN2oqRguZbeljG88Ybkahj8mcxIJSY05D2rDPKCDg0r7hptVOD45TI4mu8Cfx4o8DsDrSEDts8fCYu/Bu8Sj5AJYj/QL1b6LBO9Js1pozJuz3klggq3uUG0dJ+ghskTj8c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=doV+UWZa; 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="doV+UWZa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 75CD2C2BC9E; Mon, 23 Mar 2026 16:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774283112; bh=QJZe3QMmiIkWSPY6RiVr0KMc66d5lv48orwttDBcwaE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=doV+UWZaes+LQuzMMKN0dEzMq3EolyAqdfhsGgUrd6k/Dyb7SzyweYIkx9EXCn3Ul I4a3pSFOC1CmOKK9t8Fu/qIV+ep2iV6tlrynsn83Pe4Pq/Qczr6+fvFBNHUUTMvbOC eymNnkhzpimAGo2Ny5iWyCHb6M0hRkte7TWrmlXI= 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 6.1 405/481] Bluetooth: LE L2CAP: Disconnect if sum of payload sizes exceed SDU Date: Mon, 23 Mar 2026 14:46:27 +0100 Message-ID: <20260323134535.045765626@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134525.256603107@linuxfoundation.org> References: <20260323134525.256603107@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 6.1-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 db62b4f2c5210..e2ca5d95c96be 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -7745,6 +7745,7 @@ 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