From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933231AbcINRRK (ORCPT ); Wed, 14 Sep 2016 13:17:10 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:59902 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764289AbcINRRH (ORCPT ); Wed, 14 Sep 2016 13:17:07 -0400 From: Mark Brown To: Geert Uytterhoeven Cc: Mark Brown , , Mark Brown , linux-spi@vger.kernel.org, Adrian Remonda , linux-kernel@vger.kernel.org, stable@vger.kernel.org In-Reply-To: <1473404571-27302-1-git-send-email-geert+renesas@glider.be> Message-Id: Date: Wed, 14 Sep 2016 18:16:58 +0100 X-SA-Exim-Connect-IP: 2a01:348:6:8808:fab::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "spi: spidev_test: Fix buffer overflow in unescape()" to the spi tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch spi: spidev_test: Fix buffer overflow in unescape() has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >>From 0278b34bf15f8d8a609595b15909cd8622dd64ca Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 9 Sep 2016 09:02:51 +0200 Subject: [PATCH] spi: spidev_test: Fix buffer overflow in unescape() Sometimes spidev_test crashes with: *** Error in `spidev_test': munmap_chunk(): invalid pointer: 0x00022020 *** Aborted or just Segmentation fault This is due to transfer_escaped_string() miscalculating the required size of the buffer by one byte, causing a buffer overflow in unescape(). Drop the bogus "+ 1" in the strlen() parameter to fix this. Note that unescape() never copies the zero-terminator of the source string, so it writes at most as many bytes as the length of the source string. Fixes: 30061915be6e3a2c (spi: spidev_test: Added input buffer from the terminal) Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown Cc: # v4.5+ --- tools/spi/spidev_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c index 8a73d8185316..f3825b676e38 100644 --- a/tools/spi/spidev_test.c +++ b/tools/spi/spidev_test.c @@ -284,7 +284,7 @@ static void parse_opts(int argc, char *argv[]) static void transfer_escaped_string(int fd, char *str) { - size_t size = strlen(str + 1); + size_t size = strlen(str); uint8_t *tx; uint8_t *rx; -- 2.8.1