From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BE9FC7112A for ; Sun, 14 Oct 2018 15:42:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2A9520645 for ; Sun, 14 Oct 2018 15:42:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E2A9520645 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=decadent.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729003AbeJNXX1 (ORCPT ); Sun, 14 Oct 2018 19:23:27 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:36934 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728030AbeJNXXZ (ORCPT ); Sun, 14 Oct 2018 19:23:25 -0400 Received: from [2a02:8011:400e:2:cbab:f00:c93f:614] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1gBiMC-0004cW-28; Sun, 14 Oct 2018 16:31:04 +0100 Received: from ben by deadeye with local (Exim 4.91) (envelope-from ) id 1gBiLP-0000EZ-Pp; Sun, 14 Oct 2018 16:30:15 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Jonathan Cameron" , "Martin Kelly" Date: Sun, 14 Oct 2018 16:25:41 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 074/366] iio:buffer: make length types match kfifo types In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:cbab:f00:c93f:614 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.60-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Martin Kelly commit c043ec1ca5baae63726aae32abbe003192bc6eec upstream. Currently, we use int for buffer length and bytes_per_datum. However, kfifo uses unsigned int for length and size_t for element size. We need to make sure these matches or we will have bugs related to overflow (in the range between INT_MAX and UINT_MAX for length, for example). In addition, set_bytes_per_datum uses size_t while bytes_per_datum is an int, which would cause bugs for large values of bytes_per_datum. Change buffer length to use unsigned int and bytes_per_datum to use size_t. Signed-off-by: Martin Kelly Signed-off-by: Jonathan Cameron [bwh: Backported to 3.16: - Drop change in iio_dma_buffer_set_length() - Adjust filenames, context] Signed-off-by: Ben Hutchings --- --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -19,7 +19,7 @@ struct iio_kfifo { #define iio_to_kfifo(r) container_of(r, struct iio_kfifo, buffer) static inline int __iio_allocate_kfifo(struct iio_kfifo *buf, - int bytes_per_datum, int length) + size_t bytes_per_datum, unsigned int length) { if ((length == 0) || (bytes_per_datum == 0)) return -EINVAL; @@ -87,7 +87,7 @@ static int iio_set_bytes_per_datum_kfifo return 0; } -static int iio_set_length_kfifo(struct iio_buffer *r, int length) +static int iio_set_length_kfifo(struct iio_buffer *r, unsigned int length) { /* Avoid an invalid state */ if (length < 2) --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -52,7 +52,7 @@ struct iio_buffer_access_funcs { int (*get_bytes_per_datum)(struct iio_buffer *buffer); int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd); int (*get_length)(struct iio_buffer *buffer); - int (*set_length)(struct iio_buffer *buffer, int length); + int (*set_length)(struct iio_buffer *buffer, unsigned int length); void (*release)(struct iio_buffer *buffer); }; @@ -78,8 +78,8 @@ struct iio_buffer_access_funcs { * @ref: [INTERN] reference count of the buffer. */ struct iio_buffer { - int length; - int bytes_per_datum; + unsigned int length; + size_t bytes_per_datum; struct attribute_group *scan_el_attrs; long *scan_mask; bool scan_timestamp;