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 11FF55172F8; Wed, 30 Sep 2026 18:39:11 +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=1790793553; cv=none; b=JK0c2PQsrU+f3UAgUmV2g47awqLKugJLV1Y5PGIcu6b94/hQqN/HSAjsKajR9qhC1w+ItuTQHEosmdotWPtKCz4LXAnNhBehkyKV59HNy56qqtHKJWWMWnxFC915lTM9eJcoWlKCsO9ddBCHOEZDEdry2rmbn52AKvJDALlOkIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790793553; c=relaxed/simple; bh=s5pIXx6OTFW+SRcQ87Jl0Ixwgx45CQXTPBtMl1xAesc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EvtuZQKbv82ADD6//pGQmVZEtax1RsMXGlJDE21qhgERlxod27hldJJ+f6bB06LHAODJ+30ro0Cew23p07oKVL9DZXJClJprLoPI8qUEWt7ZgBLVNfrfPP2IpXHoPnU+glxQB95kvHKjXTVx4yHLiGwO2wbN5XrJcfdvnggHv9Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mD1MPJSn; 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="mD1MPJSn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 213741F000FF; Wed, 30 Sep 2026 18:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790793551; bh=05rceL3CVjOCOc0g/SIn5avpfP1ho0r1NtPnLEuUJKU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mD1MPJSnSqJCFBF7uN0NFkN0KzrHsOdm7TMSBV0ifg3SzIugmoUwQbAnBPNX/4qCp PW+neGMHwC/NNMR66bq/wczeWLS0NMNxXs9LjHbnHGmunXTQCyUVBBx76/BoJT7umC bsq83Cf9mOos+chLVef3Z7UoXmF2gMnNQTzEACiE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Doruk Tan Ozturk , Simon Horman , David Heidelberg Subject: [PATCH 6.18 295/395] nfc: port100: reject frames whose declared length exceeds the received data Date: Wed, 30 Sep 2026 17:29:17 +0200 Message-ID: <20260930152347.055826395@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152340.591469096@linuxfoundation.org> References: <20260930152340.591469096@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Doruk Tan Ozturk commit 092c6a605cbd6414ef499834c2e0da69c2c3388e upstream. port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested. Fixes: 562d4d59b8a1 ("NFC: Sony Port-100 Series driver") Cc: stable@vger.kernel.org Assisted-by: 0sec:claude-opus-4-8 Signed-off-by: Doruk Tan Ozturk Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260711123651.32595-1-doruk@0sec.ai Signed-off-by: David Heidelberg Signed-off-by: Greg Kroah-Hartman --- drivers/nfc/port100.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/nfc/port100.c +++ b/drivers/nfc/port100.c @@ -636,6 +636,13 @@ static void port100_recv_response(struct in_frame = dev->in_urb->transfer_buffer; + if (urb->actual_length < PORT100_FRAME_HEADER_LEN || + urb->actual_length < port100_rx_frame_size(in_frame)) { + nfc_err(&dev->interface->dev, "Received a truncated frame\n"); + cmd->status = -EIO; + goto sched_wq; + } + if (!port100_rx_frame_is_valid(in_frame)) { nfc_err(&dev->interface->dev, "Received an invalid frame\n"); cmd->status = -EIO;