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USB: ldusb: fix memleak on disconnect

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commit b14a39048c1156cfee76228bf449852da2f14df8 upstream.

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>
Link: https://lore.kernel.org/r/20191010125835.27031-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-10-10 14:58:34 +02:00 committed by prashantpaddune
parent b888b9c6d7
commit 387cc60b40
1 changed files with 1 additions and 4 deletions
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5
drivers/usb/misc/ldusb.c
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@ -384,10 +384,7 @@ 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;