From nobody Fri Sep 25 05:29:52 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 267B94CA789 for ; Wed, 16 Sep 2026 10:14:41 +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=1789553706; cv=none; b=czKwmhf8zAe+TJT9RCympFVF8Omt5bEmyFfQKJQkqoIHJvxz94HsVno9x6NDwTkSSvo2QsMtVM/kLEHlDkVDe4rBVVsEXIOdxyXuD61vGIo1DUIBg9ggCrcsK+1x20lNSOUBc/qtzKsl/Tc64nJ5dwecHVCarLyP3hy0udGvcRI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789553706; c=relaxed/simple; bh=uqeR+ga2k7Kf99yjWF3YRx/zPSPpKFEzPHpHf+D6S08=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=TekqCe0yB9vql2VN3YNRZsc8KPpzdUFjM/Wkkipl4YsmUHOb4sGtRTnki63YOFwwJ0IWBbj9XCSP2j3TwOgVHtLzwEZ07SIoyHaA35qO+Y+a0knKsNZiWrzHk7wpkfCZ8gw16TTHzyFnaqtiSXDHBgXZAwn2/vZDARcF6ufNYVs= 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 rQCowACnqTcFbKpqBe_gBw--.43129S2; Wed, 16 Sep 2026 18:14:29 +0800 (CST) From: Wentao Liang To: Laurent.pinchart@ideasonboard.com Cc: adrien.grassein@gmail.com, 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: lt8912b: Fix next_bridge reference leak in lt8912_parse_dt() Date: Wed, 16 Sep 2026 10:14:01 +0000 Message-Id: <20260916101401.2017498-1-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: rQCowACnqTcFbKpqBe_gBw--.43129S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Jw45Aw1UXrWDtr1rurykKrg_yoW8JF18pF 42g343KFWDGFyxKaySyF1DZ343AayDtFZ5CFWjkay09r1rX3WUA3WDZFWYqr1rAFy5Gr12 yr4Yk3yrJF1UAa7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9S14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_JF0_Jw1lYx0Ex4A2jsIE14v26r4UJVWxJr1lOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02 628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4 IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCV W8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_ Jr0_JF4lIxAIcVC2z280aVAFwI0_Cr0_Gr1UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Cr1j6r xdYxBIdaVFxhVjvjDU0xZFpf9x0JUJWrAUUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAQMA2qqP7mvVwAAs5 Content-Type: text/plain; charset="utf-8" lt8912_parse_dt() takes a reference to the next bridge in the pipeline with of_drm_find_and_get_bridge() and stores it in lt->bridge.next_bridge, but neither the error paths after the lookup nor the driver teardown release it. Drop the reference in the err_free_host_node label and in lt8912_put_dt(). Fixes: 31cb3cd7e714 ("drm/bridge: lt8912b: convert to of_drm_find_and_get_b= ridge()") Signed-off-by: Wentao Liang --- drivers/gpu/drm/bridge/lontium-lt8912b.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bri= dge/lontium-lt8912b.c index 8a0b48efca58..fa6cdad3f517 100644 --- a/drivers/gpu/drm/bridge/lontium-lt8912b.c +++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c @@ -743,6 +743,7 @@ static int lt8912_parse_dt(struct lt8912 *lt) return 0; =20 err_free_host_node: + drm_bridge_put(lt->bridge.next_bridge); of_node_put(port_node); of_node_put(lt->host_node); return ret; @@ -750,6 +751,7 @@ static int lt8912_parse_dt(struct lt8912 *lt) =20 static int lt8912_put_dt(struct lt8912 *lt) { + drm_bridge_put(lt->bridge.next_bridge); of_node_put(lt->host_node); return 0; } --=20 2.34.1