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=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 D0EF6C4727C for ; Tue, 29 Sep 2020 12:44:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7518F20725 for ; Tue, 29 Sep 2020 12:44:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601383468; bh=coEGVUznuFfa6GSztzmYsJ5ao0RL88SvQOSVc9PE6jw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JaYUsOp0p1e2gKWuZe3uXPCyU4N7TdNmbJ8809hL7WFBRZsWgvNgKVOo+KFT8ZX5V TIr/az/7J871rTbNlFeybNAFxjuBxKuiLAnlgDEKeY/wVV1JaThhcLwtOvjGmdnt1U R+YuVE+wtbl5DZWapnQwErjxJodK2dLvf7VnVWF0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727657AbgI2Mo1 (ORCPT ); Tue, 29 Sep 2020 08:44:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:47400 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728963AbgI2LIZ (ORCPT ); Tue, 29 Sep 2020 07:08:25 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 5DE11221E8; Tue, 29 Sep 2020 11:08:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377681; bh=coEGVUznuFfa6GSztzmYsJ5ao0RL88SvQOSVc9PE6jw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Fk+nD1TD9BRlHRbl1F50zDAO9Gq2V8ByyQhG7tmCoSK+rDKCffQ2Eb0y77d7yNVK9 oMhRuTCRXzoSE1KJFBjEeYdN8iqVdPP0Q7WAQ/gnn+hmIWzzogpv+2MVMcZVjTMLbN u1XkPCSJFgXrTXIp+V1d4P9LSBxnNP5N0D53GXQA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nikhil Devshatwar , Benoit Parrot , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.9 034/121] media: ti-vpe: cal: Restrict DMA to avoid memory corruption Date: Tue, 29 Sep 2020 12:59:38 +0200 Message-Id: <20200929105931.875075502@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105930.172747117@linuxfoundation.org> References: <20200929105930.172747117@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nikhil Devshatwar [ Upstream commit 6e72eab2e7b7a157d554b8f9faed7676047be7c1 ] When setting DMA for video capture from CSI channel, if the DMA size is not given, it ends up writing as much data as sent by the camera. This may lead to overwriting the buffers causing memory corruption. Observed green lines on the default framebuffer. Restrict the DMA to maximum height as specified in the S_FMT ioctl. Signed-off-by: Nikhil Devshatwar Signed-off-by: Benoit Parrot Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/ti-vpe/cal.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c index 563b9636ab63b..803e0794ca131 100644 --- a/drivers/media/platform/ti-vpe/cal.c +++ b/drivers/media/platform/ti-vpe/cal.c @@ -690,12 +690,13 @@ static void pix_proc_config(struct cal_ctx *ctx) } static void cal_wr_dma_config(struct cal_ctx *ctx, - unsigned int width) + unsigned int width, unsigned int height) { u32 val; val = reg_read(ctx->dev, CAL_WR_DMA_CTRL(ctx->csi2_port)); set_field(&val, ctx->csi2_port, CAL_WR_DMA_CTRL_CPORT_MASK); + set_field(&val, height, CAL_WR_DMA_CTRL_YSIZE_MASK); set_field(&val, CAL_WR_DMA_CTRL_DTAG_PIX_DAT, CAL_WR_DMA_CTRL_DTAG_MASK); set_field(&val, CAL_WR_DMA_CTRL_MODE_CONST, @@ -1321,7 +1322,8 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) csi2_lane_config(ctx); csi2_ctx_config(ctx); pix_proc_config(ctx); - cal_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline); + cal_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline, + ctx->v_fmt.fmt.pix.height); cal_wr_dma_addr(ctx, addr); csi2_ppi_enable(ctx); -- 2.25.1