Linux-USB Archive on lore.kernel.org
 help / color / Atom feed
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 4.9 33/66] usb: gadget: uvc: configfs: Drop leaked references to config items
Date: Sat,  9 Nov 2019 21:48:12 -0500
Message-ID: <20191110024846.32598-33-sashal@kernel.org> (raw)
In-Reply-To: <20191110024846.32598-1-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 d7dcd39fe12cb..3803dda54666b 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -543,6 +543,7 @@ 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;
 }
@@ -584,6 +585,7 @@ static int uvcg_control_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
@@ -2047,6 +2049,7 @@ 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;
 }
@@ -2091,6 +2094,7 @@ static int uvcg_streaming_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
-- 
2.20.1


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20191110024846.32598-1-sashal@kernel.org>
2019-11-10  2:47 ` [PATCH AUTOSEL 4.9 15/66] usb: chipidea: imx: enable OTG overcurrent in case USB subsystem is already started Sasha Levin
2019-11-10  2:47 ` [PATCH AUTOSEL 4.9 16/66] usb: chipidea: Fix otg event handler Sasha Levin
2019-11-10  2:48 ` Sasha Levin [this message]
2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 34/66] usb: gadget: uvc: configfs: Prevent format changes after linking header Sasha Levin
2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 36/66] usb: gadget: uvc: Factor out video USB request queueing Sasha Levin
2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 37/66] usb: gadget: uvc: Only halt video streaming endpoint in bulk mode Sasha Levin
2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 64/66] usb: xhci-mtk: fix ISOC error when interval is zero Sasha Levin

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191110024846.32598-33-sashal@kernel.org \
    --to=sashal@kernel.org \
    --cc=kieran.bingham@ideasonboard.com \
    --cc=laurent.pinchart@ideasonboard.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=stable@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-USB Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-usb/0 linux-usb/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-usb linux-usb/ https://lore.kernel.org/linux-usb \
		linux-usb@vger.kernel.org
	public-inbox-index linux-usb

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-usb


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git