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 D991B1C07 for ; Wed, 28 Dec 2022 16:23:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E38CC433D2; Wed, 28 Dec 2022 16:23:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672244595; bh=VojvaJ+YdHVN846OebulaGHAxOEEPYh1+JmIPzavvDQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ah6ez8j57jqzsbXkk4Crlfh4aUEghd+Z9UA7DgNws3kQk1cdQ8xr7kuQ/dKwMuyNP VwLJoK6WdT0YpKpboqtDIMhxQ6RBZUz7nHnkebt2T0qas268IazKooTKrWR7vexGEv YCY9nrWsZx8E0X2yjo5yD+OLTZHVwD2JnqKeLyc0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Heikki Krogerus , Sasha Levin Subject: [PATCH 6.1 0700/1146] usb: typec: tcpci: fix of node refcount leak in tcpci_register_port() Date: Wed, 28 Dec 2022 15:37:19 +0100 Message-Id: <20221228144349.158883339@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144330.180012208@linuxfoundation.org> References: <20221228144330.180012208@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Yang Yingliang [ Upstream commit 0384e87e3fec735e47f1c133c796f32ef7a72a9b ] I got the following report while doing device(mt6370-tcpc) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /i2c/pmic@34/tcpc/connector The 'fwnode' set in tcpci_parse_config() which is called in tcpci_register_port(), its node refcount is increased in device_get_named_child_node(). It needs be put while exiting, so call fwnode_handle_put() in the error path of tcpci_register_port() and in tcpci_unregister_port() to avoid leak. Fixes: 5e85a04c8c0d ("usb: typec: add fwnode to tcpc") Signed-off-by: Yang Yingliang Acked-by: Heikki Krogerus Link: https://lore.kernel.org/r/20221121062416.1026192-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/typec/tcpm/tcpci.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index b2bfcebe218f..72f8d1e87600 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -794,8 +794,10 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) return ERR_PTR(err); tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc); - if (IS_ERR(tcpci->port)) + if (IS_ERR(tcpci->port)) { + fwnode_handle_put(tcpci->tcpc.fwnode); return ERR_CAST(tcpci->port); + } return tcpci; } @@ -804,6 +806,7 @@ EXPORT_SYMBOL_GPL(tcpci_register_port); void tcpci_unregister_port(struct tcpci *tcpci) { tcpm_unregister_port(tcpci->port); + fwnode_handle_put(tcpci->tcpc.fwnode); } EXPORT_SYMBOL_GPL(tcpci_unregister_port); -- 2.35.1