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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Kieran Bingham <kieran.bingham@ideasonboard.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 097/191] usb: gadget: uvc: configfs: Drop leaked references to config items
Date: Sat,  9 Nov 2019 21:38:39 -0500
Message-ID: <20191110024013.29782-97-sashal@kernel.org> (raw)
In-Reply-To: <20191110024013.29782-1-sashal@kernel.org>

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

[ Upstream commit 86f3daed59bceb4fa7981d85e89f63ebbae1d561 ]

Some of the .allow_link() and .drop_link() operations implementations
call config_group_find_item() and then leak the reference to the
returned item. Fix this by dropping those references where needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/gadget/function/uvc_configfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
index b51f0d2788269..dc4edba95a478 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -544,6 +544,7 @@ static int uvcg_control_class_allow_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
@@ -579,6 +580,7 @@ static void uvcg_control_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 }
 
@@ -2038,6 +2040,7 @@ static int uvcg_streaming_class_allow_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
@@ -2078,6 +2081,7 @@ static void uvcg_streaming_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 }
 
-- 
2.20.1


  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20191110024013.29782-1-sashal@kernel.org>
2019-11-10  2:37 ` [PATCH AUTOSEL 4.19 052/191] usb: chipidea: imx: enable OTG overcurrent in case USB subsystem is already started Sasha Levin
2019-11-10  2:37 ` [PATCH AUTOSEL 4.19 053/191] usb: chipidea: Fix otg event handler Sasha Levin
2019-11-10  2:37 ` [PATCH AUTOSEL 4.19 054/191] usb: usbtmc: Fix ioctl USBTMC_IOCTL_ABORT_BULK_OUT Sasha Levin
2019-11-10  2:38 ` Sasha Levin [this message]
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 098/191] usb: gadget: uvc: configfs: Prevent format changes after linking header Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 099/191] usb: gadget: uvc: configfs: Sort frame intervals upon writing Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 108/191] usb: gadget: uvc: Factor out video USB request queueing Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 109/191] usb: gadget: uvc: Only halt video streaming endpoint in bulk mode Sasha Levin
2019-11-10  2:40 ` [PATCH AUTOSEL 4.19 184/191] usb: xhci-mtk: fix ISOC error when interval is zero Sasha Levin
2019-11-10  2:40 ` [PATCH AUTOSEL 4.19 185/191] usb: usbtmc: uninitialized symbol 'actual' in usbtmc_ioctl_clear Sasha Levin

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