From e947d9ad8ab118d51ff07b7d93c3c1a3e9f7c42f Mon Sep 17 00:00:00 2001 From: Alexey Khoroshilov Date: Mon, 8 Sep 2014 19:10:43 -0300 Subject: [PATCH] [media] mceusb: fix usbdev leak mceusb_init_rc_dev() does usb_get_dev(), but there is no any usb_put_dev() in the driver. The patch tries to straighten logic. It moves usb_get_dev() directly to mceusb_dev_probe() and adds usb_put_dev() to an error path and to mceusb_dev_disconnect(). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/mceusb.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c index 383e24af91ec..2cdb740cde48 100644 --- a/drivers/media/rc/mceusb.c +++ b/drivers/media/rc/mceusb.c @@ -1202,10 +1202,9 @@ static void mceusb_flash_led(struct mceusb_dev *ir) mce_async_out(ir, FLASH_LED, sizeof(FLASH_LED)); } -static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir, - struct usb_interface *intf) +static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir) { - struct usb_device *udev = usb_get_dev(interface_to_usbdev(intf)); + struct usb_device *udev = ir->usbdev; struct device *dev = ir->dev; struct rc_dev *rc; int ret; @@ -1345,7 +1344,7 @@ static int mceusb_dev_probe(struct usb_interface *intf, if (!ir->urb_in) goto urb_in_alloc_fail; - ir->usbdev = dev; + ir->usbdev = usb_get_dev(dev); ir->dev = &intf->dev; ir->len_in = maxp; ir->flags.microsoft_gen1 = is_microsoft_gen1; @@ -1366,7 +1365,7 @@ static int mceusb_dev_probe(struct usb_interface *intf, snprintf(name + strlen(name), sizeof(name) - strlen(name), " %s", buf); - ir->rc = mceusb_init_rc_dev(ir, intf); + ir->rc = mceusb_init_rc_dev(ir); if (!ir->rc) goto rc_dev_fail; @@ -1412,6 +1411,7 @@ static int mceusb_dev_probe(struct usb_interface *intf, /* Error-handling path */ rc_dev_fail: + usb_put_dev(ir->usbdev); usb_free_urb(ir->urb_in); urb_in_alloc_fail: usb_free_coherent(dev, maxp, ir->buf_in, ir->dma_in); @@ -1439,6 +1439,7 @@ static void mceusb_dev_disconnect(struct usb_interface *intf) usb_kill_urb(ir->urb_in); usb_free_urb(ir->urb_in); usb_free_coherent(dev, ir->len_in, ir->buf_in, ir->dma_in); + usb_put_dev(dev); kfree(ir); } -- 2.20.1