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| author | Johan Hovold <johan@kernel.org> | 2017-03-13 13:47:52 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-14 17:07:30 +0800 |
| commit | daf229b15907fbfdb6ee183aac8ca428cb57e361 (patch) | |
| tree | 57aee7e47013cab76964b20c584bf0b8bda38ff9 /drivers/uwb/hwa-rc.c | |
| parent | 03ace948a4eb89d1cf51c06afdfc41ebca5fdb27 (diff) | |
| download | blackbird-obmc-linux-daf229b15907fbfdb6ee183aac8ca428cb57e361.tar.gz blackbird-obmc-linux-daf229b15907fbfdb6ee183aac8ca428cb57e361.zip | |
uwb: hwa-rc: fix NULL-deref at probe
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Note that the dereference happens in the start callback which is called
during probe.
Fixes: de520b8bd552 ("uwb: add HWA radio controller driver")
Cc: stable <stable@vger.kernel.org> # 2.6.28
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uwb/hwa-rc.c')
| -rw-r--r-- | drivers/uwb/hwa-rc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/uwb/hwa-rc.c b/drivers/uwb/hwa-rc.c index 0aa6c3c29d17..35a1e777b449 100644 --- a/drivers/uwb/hwa-rc.c +++ b/drivers/uwb/hwa-rc.c @@ -823,6 +823,9 @@ static int hwarc_probe(struct usb_interface *iface, struct hwarc *hwarc; struct device *dev = &iface->dev; + if (iface->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + result = -ENOMEM; uwb_rc = uwb_rc_alloc(); if (uwb_rc == NULL) { |
