From patchwork Thu Mar 14 12:30:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunfei Dong X-Patchwork-Id: 13592405 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 046A7C54E68 for ; Thu, 14 Mar 2024 12:30:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=VAZJ2A5d1ORSXorRMH9Vg15G3GR6ZgWE5/SnRgi6mtE=; b=kQdB2pv2AKyLNt iRVQrztpOOpebyKerOG4zPYP/6G8aX2HCc9GpxnQTNdzthFVcdptSW4DsyM8JelgzssSi39kGDbPH Np9x8W3dAQb/Uk50GgOp7pA04P76rbhlKgjiMfd5HYl/m/ALenbQzVNdMd4pefcF53TEa4H/+bZGq 3TNHu8xKRy7PiAVZmzw376BcCuXpe8+scck59va4yc3VYGtp2zs3SKM52PBWgXrrMvQwTfN4ffjjB d4xWtC/dYRdNM4kE4nqRq4+zoejhRC8EQ+zj7mQP/we0hgVoj4BgPuV+lSxQ9gCkD/Z3pufceTjlA rc/ZR+P80x+Vq+QKSjkA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rkkEF-0000000EFfm-29q2; Thu, 14 Mar 2024 12:30:35 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rkkE0-0000000EFWI-01f8; Thu, 14 Mar 2024 12:30:21 +0000 X-UUID: 9c6a038ee1fe11ee9aa9374d6d45775a-20240314 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=MmhZ9/MwLe57qnbM5toDGFquaGi4ZGWQ7c1fMaic248=; b=StFWL28Bte6HlG0H4kpvUGaGLWc7KZjfYQL3XSwSnvIPoTok/Ucwn5DjFNIghO8mpEuDb65L/R1rT3rwdqKJshvcj11DLaxUuvNz1wRCM82zD8UusJGyGTmGKcNvmelvFNemeIotZtWvV1oGW1Fo+PCkN6NJtGqnCLpY6l6xQVc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37,REQID:7a3b24da-4b7c-488e-b169-c04c4b160e5f,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:6f543d0,CLOUDID:466c8081-4f93-4875-95e7-8c66ea833d57,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES :1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 9c6a038ee1fe11ee9aa9374d6d45775a-20240314 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 844625435; Thu, 14 Mar 2024 05:30:15 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 14 Mar 2024 20:30:12 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 14 Mar 2024 20:30:12 +0800 From: Yunfei Dong To: =?utf-8?q?N=C3=ADcolas_F_=2E_R_=2E_A_=2E_Prado?= , Nicolas Dufresne , Hans Verkuil , AngeloGioacchino Del Regno , Benjamin Gaignard , Nathan Hebert , Sebastian Fricke , Irui Wang CC: Hsin-Yi Wang , Fritz Koenig , Daniel Vetter , Steve Cho , Yunfei Dong , , , , , , Subject: [PATCH v4,2/2] media: mediatek: vcodec: adding lock to protect encoder context list Date: Thu, 14 Mar 2024 20:30:09 +0800 Message-ID: <20240314123009.20205-3-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240314123009.20205-1-yunfei.dong@mediatek.com> References: <20240314123009.20205-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240314_053020_087603_B01CBF90 X-CRM114-Status: GOOD ( 15.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a lock for the ctx_list, to avoid accessing a NULL pointer within the 'vpu_enc_ipi_handler' fucntion when the ctx_list has been deleted due to an unexpected behavior on the SCP IP block. Fixes: 1972e32431ed ("media: mediatek: vcodec: Fix possible invalid memory access for encoder") Signed-off-by: Yunfei Dong Reviewed-by: Nicolas Dufresne Reviewed-by: AngeloGioacchino Del Regno --- .../platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c | 4 ++-- .../platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c | 5 +++++ .../platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h | 2 ++ drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c | 2 ++ 4 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c index 9a11a2c24804..8d578b690214 100644 --- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c +++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c @@ -73,12 +73,12 @@ static void mtk_vcodec_vpu_reset_enc_handler(void *priv) dev_err(&dev->plat_dev->dev, "Watchdog timeout!!"); - mutex_lock(&dev->dev_mutex); + mutex_lock(&dev->dev_ctx_lock); list_for_each_entry(ctx, &dev->ctx_list, list) { ctx->state = MTK_STATE_ABORT; mtk_v4l2_vdec_dbg(0, ctx, "[%d] Change to state MTK_STATE_ABORT", ctx->id); } - mutex_unlock(&dev->dev_mutex); + mutex_unlock(&dev->dev_ctx_lock); } static const struct mtk_vcodec_fw_ops mtk_vcodec_vpu_msg = { diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c index 6319f24bc714..3cb8a1622222 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c +++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c @@ -177,7 +177,9 @@ static int fops_vcodec_open(struct file *file) mtk_v4l2_venc_dbg(2, ctx, "Create instance [%d]@%p m2m_ctx=%p ", ctx->id, ctx, ctx->m2m_ctx); + mutex_lock(&dev->dev_ctx_lock); list_add(&ctx->list, &dev->ctx_list); + mutex_unlock(&dev->dev_ctx_lock); mutex_unlock(&dev->dev_mutex); mtk_v4l2_venc_dbg(0, ctx, "%s encoder [%d]", dev_name(&dev->plat_dev->dev), @@ -212,7 +214,9 @@ static int fops_vcodec_release(struct file *file) v4l2_fh_exit(&ctx->fh); v4l2_ctrl_handler_free(&ctx->ctrl_hdl); + mutex_lock(&dev->dev_ctx_lock); list_del_init(&ctx->list); + mutex_unlock(&dev->dev_ctx_lock); kfree(ctx); mutex_unlock(&dev->dev_mutex); return 0; @@ -294,6 +298,7 @@ static int mtk_vcodec_probe(struct platform_device *pdev) mutex_init(&dev->enc_mutex); mutex_init(&dev->dev_mutex); + mutex_init(&dev->dev_ctx_lock); spin_lock_init(&dev->irqlock); snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s", diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h index a042f607ed8d..0bd85d0fb379 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h +++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h @@ -178,6 +178,7 @@ struct mtk_vcodec_enc_ctx { * * @enc_mutex: encoder hardware lock. * @dev_mutex: video_device lock + * @dev_ctx_lock: the lock of context list * @encode_workqueue: encode work queue * * @enc_irq: h264 encoder irq resource @@ -205,6 +206,7 @@ struct mtk_vcodec_enc_dev { /* encoder hardware mutex lock */ struct mutex enc_mutex; struct mutex dev_mutex; + struct mutex dev_ctx_lock; struct workqueue_struct *encode_workqueue; int enc_irq; diff --git a/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c b/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c index 84ad1cc6ad17..51bb7ee141b9 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c +++ b/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c @@ -47,12 +47,14 @@ static bool vpu_enc_check_ap_inst(struct mtk_vcodec_enc_dev *enc_dev, struct ven struct mtk_vcodec_enc_ctx *ctx; int ret = false; + mutex_lock(&enc_dev->dev_ctx_lock); list_for_each_entry(ctx, &enc_dev->ctx_list, list) { if (!IS_ERR_OR_NULL(ctx) && ctx->vpu_inst == vpu) { ret = true; break; } } + mutex_unlock(&enc_dev->dev_ctx_lock); return ret; }