From nobody Fri Sep 25 05:30:01 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CF6224AFE25 for ; Wed, 16 Sep 2026 10:09:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789553426; cv=none; b=PGrGxLfU0uB+BptI1v8/QiTP3UZzxOJzg0WbZRqOO/85lqgloM57P6S1e1/DQFNK0NyCmbwt3FeQMXMwFirbe7gUdEMCfw6cSinkXvvd9xb8emYcIY56t4voKVEsDPTDINlwBmqGxRbWb9Q0Hk6Dq445tWN4FkLI2nzUQ7qjFZw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789553426; c=relaxed/simple; bh=NgBQs/l0LiAU9vX02+uULoPBHNRE7I6IiG1tyU92OjI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=M2xjBEbeVxdkjL8L3BjdifT+Z5w5iTYNtFoPKfVF8GKW9D0rXvY6zcannpmMHLx3JEWzD9mtm0ExduzjQ/263yjyzBiirKDjlYmG05HXWbHr7bvJ3AvnqZnPztTyXNdeB/83B8qlma7Yzu8q0BdI0yAbKaJtPVB84i07eGHMCaM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-03 (Coremail) with SMTP id rQCowAAnKjjkaqpqLuLgBw--.41836S2; Wed, 16 Sep 2026 18:09:40 +0800 (CST) From: Wentao Liang To: Laurent.pinchart@ideasonboard.com Cc: airlied@gmail.com, andrzej.hajda@intel.com, dri-devel@lists.freedesktop.org, jernej.skrabec@gmail.com, jonas@kwiboo.se, linux-kernel@vger.kernel.org, luca.ceresoli@bootlin.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, neil.armstrong@linaro.org, rfoss@kernel.org, simona@ffwll.ch, tzimmermann@suse.de, Wentao Liang Subject: [PATCH] drm/bridge: dw-hdmi: Fix next_bridge reference leak in dw_hdmi_parse_dt() Date: Wed, 16 Sep 2026 10:09:12 +0000 Message-Id: <20260916100912.2014953-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowAAnKjjkaqpqLuLgBw--.41836S2 X-Coremail-Antispam: 1UD129KBjvJXoW7ur1xtFyfKw4DXFykXw18Xwb_yoW8Gr45pF 47X34YkryrGay7ta17Z3W8ZF9IyasrtFWfCry7Ww4Svrn5XF15CryDAFy3Xr1jyFy7Gw1a yr4kG3yrJa47AFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9S14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jw0_WrylYx0Ex4A2jsIE14v26r4UJVWxJr1lOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02 628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4 IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCV W8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_ Jr0_JF4lIxAIcVC2z280aVAFwI0_Cr0_Gr1UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Cr1j6r xdYxBIdaVFxhVjvjDU0xZFpf9x0JULo7NUUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAMMA2qqP7mp4wADsP Content-Type: text/plain; charset="utf-8" dw_hdmi_parse_dt() takes a reference to the next bridge in the pipeline with of_drm_find_and_get_bridge() and stores it in hdmi->bridge.next_bridge, but neither the probe error paths nor the driver teardown release it. Drop the reference in the err_res label of dw_hdmi_probe() and in dw_hdmi_remove(). Fixes: 4e7fd5aa3f39 ("drm/bridge: dw-hdmi: convert to of_drm_find_and_get_b= ridge()") Signed-off-by: Wentao Liang --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/br= idge/synopsys/dw-hdmi.c index 1da12e4616fe..3000572d99fe 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -3599,6 +3599,7 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device = *pdev, return hdmi; =20 err_res: + drm_bridge_put(hdmi->bridge.next_bridge); i2c_put_adapter(hdmi->ddc); =20 return ERR_PTR(ret); @@ -3608,6 +3609,7 @@ EXPORT_SYMBOL_GPL(dw_hdmi_probe); void dw_hdmi_remove(struct dw_hdmi *hdmi) { drm_bridge_remove(&hdmi->bridge); + drm_bridge_put(hdmi->bridge.next_bridge); =20 if (hdmi->audio && !IS_ERR(hdmi->audio)) platform_device_unregister(hdmi->audio); --=20 2.34.1