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From: Johan Hovold <johan@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	Juergen Stuber <starblue@users.sourceforge.net>,
	Johan Hovold <johan@kernel.org>, stable <stable@vger.kernel.org>
Subject: [PATCH 1/2] USB: ldusb: fix memleak on disconnect
Date: Thu, 10 Oct 2019 14:58:34 +0200
Message-ID: <20191010125835.27031-2-johan@kernel.org> (raw)
In-Reply-To: <20191010125835.27031-1-johan@kernel.org>

If disconnect() races with release() after a process has been
interrupted, release() could end up returning early and the driver would
fail to free its driver data.

Fixes: 2824bd250f0b ("[PATCH] USB: add ldusb driver")
Cc: stable <stable@vger.kernel.org>     # 2.6.13
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/misc/ldusb.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c
index f3108d85e768..147c90c2a4e5 100644
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -380,10 +380,7 @@ static int ld_usb_release(struct inode *inode, struct file *file)
 		goto exit;
 	}
 
-	if (mutex_lock_interruptible(&dev->mutex)) {
-		retval = -ERESTARTSYS;
-		goto exit;
-	}
+	mutex_lock(&dev->mutex);
 
 	if (dev->open_count != 1) {
 		retval = -ENODEV;
-- 
2.23.0


  reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10 12:58 [PATCH 0/2] USB: misc: more disconnect fixes Johan Hovold
2019-10-10 12:58 ` Johan Hovold [this message]
2019-10-10 12:58 ` [PATCH 2/2] USB: legousbtower: fix memleak on disconnect Johan Hovold

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