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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 3120CC2D0DB for ; Tue, 28 Jan 2020 14:23:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06DD824688 for ; Tue, 28 Jan 2020 14:23:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221428; bh=WwZHyOY2VemlvryYFlEoA2dm0HI2D0kYuVp0LfkO2Zo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qVyhuIjPfbsnsnEs/dmsRE+PX90FZ+Yl5vU8uVT4EpDDltgmUZOegCQYtjWrmAOMi UH3fAY0pO2/WEfHm9v/JYkPXf1r39grFQUIM0469pUkAEoZRNdgQ2qn/hpc/mSrfNc CV6ZF1Ik5QaenUvb0qtzxgRa8yfABCLYcyGFjxdo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732407AbgA1OXq (ORCPT ); Tue, 28 Jan 2020 09:23:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:49956 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726710AbgA1OXl (ORCPT ); Tue, 28 Jan 2020 09:23:41 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2C09624686; Tue, 28 Jan 2020 14:23:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221420; bh=WwZHyOY2VemlvryYFlEoA2dm0HI2D0kYuVp0LfkO2Zo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FPEMN7Ds6LnTeW119sB7rHV88+M0S/YhMbHdb5/RiIkdwPRUOINvuMa9xROS0KA22 WVx08OsFmkaRByRMA4CGPkrWQeZH7xQUwL0q3AhffUqC4oLDeCv4lx5N4nsSrV/kr/ F/+gI95USi5E9Ubi2aSsnmb8J0836gNyGLDXN3Vg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, stable@vger.kernel, Robin Gong , Jurgen Lambrecht , Vinod Koul , Sasha Levin Subject: [PATCH 4.9 216/271] dmaengine: imx-sdma: fix size check for sdma script_number Date: Tue, 28 Jan 2020 15:06:05 +0100 Message-Id: <20200128135908.614440216@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135852.449088278@linuxfoundation.org> References: <20200128135852.449088278@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 9f240b2d85a54..558d509b7d855 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1441,6 +1441,14 @@ 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 2d08816720f6d..5bb0a119f39a3 100644 --- a/include/linux/platform_data/dma-imx-sdma.h +++ b/include/linux/platform_data/dma-imx-sdma.h @@ -50,7 +50,10 @@ 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