From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 723872737EE; Fri, 9 Jan 2026 12:17:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961059; cv=none; b=d8s0qqULl8LZqg2zEaAohSL2URC3aMs5K/TAT0BML9f3hdEftNGzUUxydScTpD+nUxlXGtpu7tiJ2BO49UYkacEf/sFqzglTxBiA4iAXnBC5zlMNb4KgthHihexMRMOajQu7f4p0k7eegF7T00zHSgRR5Lhib3OwfOP2zswYT04= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961059; c=relaxed/simple; bh=LQwO7B3SlV9PyhSTOceCGDTm9c15SnzB4cARyc2CcFI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r50tGv44aJR6qX77MJVBXf6df0UxxM1DrOtnYDXvMjl/XnZItiOdG3OeiUcQw9jZ0saRVLhmSUdsCPyq4OsaRDeZsFAeUcB8S8S+uKS19wjBoV82H3GjLXybh5qTivasCT25qC9vxIryO+fzij89bzhY5V9jDRq/jXd7ZaiGibk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zM9KTtkD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="zM9KTtkD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F05DBC16AAE; Fri, 9 Jan 2026 12:17:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767961059; bh=LQwO7B3SlV9PyhSTOceCGDTm9c15SnzB4cARyc2CcFI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zM9KTtkD9bVkwpRe4QJbL72u9IlmfAi4KbZJKwD/REnES3UXZg6Qzq3f4bnBkXGZP mVzVPh3XOdtRGTQTxVUWHWEj/f6QkhKO7l/Gbyde0IercLrhbG6BBK3ZxMjZ5HS33r 4duSwo56VzlPvlsunkBRqXe7MkR7LYmT2UmSmyDA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miaoqian Lin , Markus Schneider-Pargmann , CK Hu , Chun-Kuang Hu Subject: [PATCH 6.6 620/737] drm/mediatek: Fix device node reference leak in mtk_dp_dt_parse() Date: Fri, 9 Jan 2026 12:42:39 +0100 Message-ID: <20260109112157.326373418@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miaoqian Lin commit a846505a193d7492ad3531e33cacfca31e4bcdd1 upstream. The function mtk_dp_dt_parse() calls of_graph_get_endpoint_by_regs() to get the endpoint device node, but fails to call of_node_put() to release the reference when the function returns. This results in a device node reference leak. Fix this by adding the missing of_node_put() call before returning from the function. Found via static analysis and code review. Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin Reviewed-by: Markus Schneider-Pargmann Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20251029072307.10955-1-linmq006@gmail.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/mediatek/mtk_dp.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1969,6 +1969,7 @@ static int mtk_dp_dt_parse(struct mtk_dp endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1); len = of_property_count_elems_of_size(endpoint, "data-lanes", sizeof(u32)); + of_node_put(endpoint); if (len < 0 || len > 4 || len == 3) { dev_err(dev, "invalid data lane size: %d\n", len); return -EINVAL;