3.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alexey Khoroshilov <[email protected]> commit afd270d1a45043cef14341bcceff62ed50e8dc9a upstream. There is no usb_put_dev() on failure paths in usbvision_probe(). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/media/usb/usbvision/usbvision-video.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) --- a/drivers/media/usb/usbvision/usbvision-video.c +++ b/drivers/media/usb/usbvision/usbvision-video.c @@ -1522,7 +1522,7 @@ static int usbvision_probe(struct usb_in const struct usb_host_interface *interface; struct usb_usbvision *usbvision = NULL; const struct usb_endpoint_descriptor *endpoint; - int model, i; + int model, i, ret; PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u", dev->descriptor.idVendor, @@ -1531,7 +1531,8 @@ static int usbvision_probe(struct usb_in model = devid->driver_info; if (model < 0 || model >= usbvision_device_data_size) { PDEBUG(DBG_PROBE, "model out of bounds %d", model); - return -ENODEV; + ret = -ENODEV; + goto err_usb; } printk(KERN_INFO "%s: %s found\n", __func__, usbvision_device_data[model].model_string); @@ -1553,18 +1554,21 @@ static int usbvision_probe(struct usb_in __func__, ifnum); dev_err(&intf->dev, "%s: Endpoint attributes %d", __func__, endpoint->bmAttributes); - return -ENODEV; + ret = -ENODEV; + goto err_usb; } if (usb_endpoint_dir_out(endpoint)) { dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n", __func__, ifnum); - return -ENODEV; + ret = -ENODEV; + goto err_usb; } usbvision = usbvision_alloc(dev, intf); if (usbvision == NULL) { dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__); - return -ENOMEM; + ret = -ENOMEM; + goto err_usb; } if (dev->descriptor.bNumConfigurations > 1) @@ -1583,8 +1587,8 @@ static int usbvision_probe(struct usb_in usbvision->alt_max_pkt_size = kmalloc(32 * usbvision->num_alt, GFP_KERNEL); if (usbvision->alt_max_pkt_size == NULL) { dev_err(&intf->dev, "usbvision: out of memory!\n"); - usbvision_release(usbvision); - return -ENOMEM; + ret = -ENOMEM; + goto err_pkt; } for (i = 0; i < usbvision->num_alt; i++) { @@ -1619,6 +1623,12 @@ static int usbvision_probe(struct usb_in PDEBUG(DBG_PROBE, "success"); return 0; + +err_pkt: + usbvision_release(usbvision); +err_usb: + usb_put_dev(dev); + return ret; }
