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| author | Oliver Neukum <oneukum@suse.com> | 2016-03-16 13:26:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-18 09:19:02 -0700 |
| commit | 0b818e3956fc1ad976bee791eadcbb3b5fec5bfd (patch) | |
| tree | 87540d681d17237c4a19fcb67e4142243959eeea | |
| parent | 7222c832254a75dcd67d683df75753d4a4e125bb (diff) | |
| download | linux-0b818e3956fc1ad976bee791eadcbb3b5fec5bfd.tar.bz2 | |
USB: usb_driver_claim_interface: add sanity checking
Attacks that trick drivers into passing a NULL pointer
to usb_driver_claim_interface() using forged descriptors are
known. This thwarts them by sanity checking.
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/core/driver.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 56593a9a8726..2057d91d8336 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -502,11 +502,15 @@ static int usb_unbind_interface(struct device *dev) int usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void *priv) { - struct device *dev = &iface->dev; + struct device *dev; struct usb_device *udev; int retval = 0; int lpm_disable_error; + if (!iface) + return -ENODEV; + + dev = &iface->dev; if (dev->driver) return -EBUSY; |