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 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 C3D36C88E72 for ; Thu, 17 Sep 2026 10:07:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=0GHjhtVvxFLZhScL54L2jBcW8yR+A4yG3rVQcdon9mc=; b=jU4NkVRKMd31QN/fqTWhA2dekA EAX89E9Ey6aZLcznf17GAmdPNuqU+yRbAk3T+E3z1yyWpKBmszZ9vlD4vEKYIP3ZP/9XuXf3l7atp VzkwCfrueUxfrh3zSCBPAkciY9WdFMNs5e2rDUS5n8feTtN8QhXHU0Fg+GZmMqMDaDHmaaxGgSdxj wq3w1QrUOR65YwmlXb0H8AJofDlLG2TBFNDdKkeGbxqLS7UXZ8QqbsX7U65w7T+CIHnB5nzWVHcA7 sph+rHFdGHZBf6dgi2ghxJnBIB4Bofw4j5iUFssLYOlmtWI65fDKtIzfADnlBnFWayoTXJ8I7S2iC yJ/4Ocqw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x791a-0000000B4ZP-2nDi; Thu, 17 Sep 2026 10:07:26 +0000 Received: from smtp25.cstnet.cn ([159.226.251.25] helo=cstnet.cn) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x791Y-0000000B4YZ-26GG; Thu, 17 Sep 2026 10:07:26 +0000 Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowACHuELZu6tqD0t+CA--.353S2; Thu, 17 Sep 2026 18:07:21 +0800 (CST) From: Wentao Liang To: angelogioacchino.delregno@collabora.com Cc: hverkuil@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, mchehab@kernel.org, moudy.ho@mediatek.com, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] media: platform: mtk-mdp3: Fix device reference leak in mdp_comp_init() Date: Thu, 17 Sep 2026 10:07:21 +0000 Message-Id: <20260917100721.2146044-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: zQCowACHuELZu6tqD0t+CA--.353S2 X-Coremail-Antispam: 1UD129KBjvJXoW7uw4xCFyUCr15tr15tw1xGrg_yoW8tw1fpF WUKay5ArW8WFsFgF4Yy3WDu3W5Aw1S9ayUWr1xtw1Iy3ZxWrWUGFy0v3WqvrZ5AF9aya43 J3W8tryxuayUZaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPvb7Iv0xC_Kw4lb4IE77IF4wAFc2x0x2IEx4CE42xK8VAvwI8I cIk0rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2 AK021l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v2 6F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxV W0oVCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv 7VC0I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Gr1j6F4UJwAm72CE4IkC6x0Yz7 v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0E0s8F02x267IIx4CEVc8vx2IErcIFxwAC I402YVCY1x02628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrw CF04k20xvE74AGY7Cv6cx26r48ZrWUJr1UMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E 5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtV W8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r4UMIIF0xvE2Ix0cI8IcVCY 1x0267AKxVWxJVW8Jr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14 v26r4UJVWxJr1lIxAIcVC2z280aVCY1x0267AKxVW0oVCq3bIYCTnIWIevJa73UjIFyTuY vjxUqdHjUUUUU X-Originating-IP: [36.110.52.2] X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgkNA2qrq3ZB1gAAsK X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260917_030724_907852_F98AF916 X-CRM114-Status: GOOD ( 12.62 ) 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 mdp_comp_init() takes a reference to the component platform device with of_find_device_by_node(), but the error path taken when the clock array cannot be allocated and the one taken for a component without a GCE EOF event return without dropping it. The caller frees the mdp_comp in those cases, so the reference is leaked. Release the reference on both error paths. Fixes: c4320f9721fd ("media: platform: mtk-mdp3: dynamically allocate component clocks") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- .../media/platform/mediatek/mdp3/mtk-mdp3-comp.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c index 7fcb2fbdd64e..acb2758a7b42 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c @@ -1730,6 +1730,7 @@ static int mdp_comp_init(struct mdp_dev *mdp, struct device_node *node, struct device *dev = &mdp->pdev->dev; struct platform_device *pdev_c; int clk_ofst; + int ret; int i; s32 event; @@ -1756,8 +1757,10 @@ static int mdp_comp_init(struct mdp_dev *mdp, struct device_node *node, comp->clk_num = mdp->mdp_data->comp_data[id].info.clk_num; comp->clks = devm_kzalloc(dev, sizeof(struct clk *) * comp->clk_num, GFP_KERNEL); - if (!comp->clks) - return -ENOMEM; + if (!comp->clks) { + ret = -ENOMEM; + goto err_put_device; + } clk_ofst = mdp->mdp_data->comp_data[id].info.clk_ofst; @@ -1782,7 +1785,8 @@ static int mdp_comp_init(struct mdp_dev *mdp, struct device_node *node, if (of_property_read_u32_index(node, "mediatek,gce-events", MDP_GCE_EVENT_EOF, &event)) { dev_err(dev, "Component id %d has no EOF\n", id); - return -EINVAL; + ret = -EINVAL; + goto err_put_device; } } else { event = MDP_GCE_NO_EVENT; @@ -1791,6 +1795,10 @@ static int mdp_comp_init(struct mdp_dev *mdp, struct device_node *node, comp->gce_event[MDP_GCE_EVENT_EOF] = event; return 0; + +err_put_device: + put_device(&pdev_c->dev); + return ret; } static void mdp_comp_deinit(struct mdp_comp *comp) -- 2.34.1