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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 F4049C33CB6 for ; Thu, 16 Jan 2020 17:24:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C728824684 for ; Thu, 16 Jan 2020 17:24:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579195446; bh=X71KVo4xG0cjqx0gcs9hfFfsMPtQ4qoxi0HywtBXbOE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iL0fzjo6kPhZlTTzToQTmQ8sI/vkOjqoocwHkwIrHbSgZ/lZJXIbivQVVSFsUU1JN +mQgumb12KOWiMx2s1093lMzTzIWS3P0vFf0/FwgBXbUCdOwYZDI6ayJc+8VWqTaYG Qwf/jZhliIUiy5fmj3WjgELFonYlu8mOmadAHK+I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388127AbgAPRND (ORCPT ); Thu, 16 Jan 2020 12:13:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:57024 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729380AbgAPRNC (ORCPT ); Thu, 16 Jan 2020 12:13:02 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5F3BF24690; Thu, 16 Jan 2020 17:13:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579194781; bh=X71KVo4xG0cjqx0gcs9hfFfsMPtQ4qoxi0HywtBXbOE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZC+BGZ0iiiA1tSaElD3iPhuz1NR0W2+Xizz3BLsQ0qotj6Cdc8aGZ1iOPny0/WPpm cqgt1ZqfcKeyMNJyw5MYdlEuXWqOe4Ts2nxYKxu0BozXHhT4P4SZWPYrp/MT53/92i pmJzfKwe5SUc35jZ5MrgjAPGHQt9H6HOCi9F00sM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Robin Gong , stable@vger.kernel, Jurgen Lambrecht , Vinod Koul , Sasha Levin , dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 597/671] dmaengine: imx-sdma: fix size check for sdma script_number Date: Thu, 16 Jan 2020 12:03:55 -0500 Message-Id: <20200116170509.12787-334-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116170509.12787-1-sashal@kernel.org> References: <20200116170509.12787-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org From: Robin Gong [ Upstream commit bd73dfabdda280fc5f05bdec79b6721b4b2f035f ] Illegal memory will be touch if SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 (41) exceed the size of structure sdma_script_start_addrs(40), thus cause memory corrupt such as slob block header so that kernel trap into while() loop forever in slob_free(). Please refer to below code piece in imx-sdma.c: for (i = 0; i < sdma->script_number; i++) if (addr_arr[i] > 0) saddr_arr[i] = addr_arr[i]; /* memory corrupt here */ That issue was brought by commit a572460be9cf ("dmaengine: imx-sdma: Add support for version 3 firmware") because SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 (38->41 3 scripts added) not align with script number added in sdma_script_start_addrs(2 scripts). Fixes: a572460be9cf ("dmaengine: imx-sdma: Add support for version 3 firmware") Cc: stable@vger.kernel Link: https://www.spinics.net/lists/arm-kernel/msg754895.html Signed-off-by: Robin Gong Reported-by: Jurgen Lambrecht Link: https://lore.kernel.org/r/1569347584-3478-1-git-send-email-yibin.gong@nxp.com [vkoul: update the patch title] Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/imx-sdma.c | 8 ++++++++ include/linux/platform_data/dma-imx-sdma.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 3f5a01cb4ab4..ceb82e74f5b4 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1662,6 +1662,14 @@ static void sdma_add_scripts(struct sdma_engine *sdma, if (!sdma->script_number) sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; + if (sdma->script_number > sizeof(struct sdma_script_start_addrs) + / sizeof(s32)) { + dev_err(sdma->dev, + "SDMA script number %d not match with firmware.\n", + sdma->script_number); + return; + } + for (i = 0; i < sdma->script_number; i++) if (addr_arr[i] > 0) saddr_arr[i] = addr_arr[i]; diff --git a/include/linux/platform_data/dma-imx-sdma.h b/include/linux/platform_data/dma-imx-sdma.h index 6eaa53cef0bd..30e676b36b24 100644 --- a/include/linux/platform_data/dma-imx-sdma.h +++ b/include/linux/platform_data/dma-imx-sdma.h @@ -51,7 +51,10 @@ struct sdma_script_start_addrs { /* End of v2 array */ s32 zcanfd_2_mcu_addr; s32 zqspi_2_mcu_addr; + s32 mcu_2_ecspi_addr; /* End of v3 array */ + s32 mcu_2_zqspi_addr; + /* End of v4 array */ }; /** -- 2.20.1