diff options
| author | Oliver Neukum <oneukum@suse.com> | 2016-03-17 14:00:17 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-03-17 14:16:57 -0700 |
| commit | a0ad220c96692eda76b2e3fd7279f3dcd1d8a8ff (patch) | |
| tree | 190098d9c8a1bbde8aa240df197ac02e2a1bf732 /drivers/input/misc/ims-pcu.c | |
| parent | 9aa40426a4a23dfd9ca4c1c0f777b8c57e5070fd (diff) | |
| download | linux-a0ad220c96692eda76b2e3fd7279f3dcd1d8a8ff.tar.bz2 | |
Input: ims-pcu - sanity check against missing interfaces
A malicious device missing interface can make the driver oops.
Add sanity checking.
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/misc/ims-pcu.c')
| -rw-r--r-- | drivers/input/misc/ims-pcu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c index ac1fa5f44580..9c0ea36913b4 100644 --- a/drivers/input/misc/ims-pcu.c +++ b/drivers/input/misc/ims-pcu.c @@ -1663,6 +1663,8 @@ static int ims_pcu_parse_cdc_data(struct usb_interface *intf, struct ims_pcu *pc pcu->ctrl_intf = usb_ifnum_to_if(pcu->udev, union_desc->bMasterInterface0); + if (!pcu->ctrl_intf) + return -EINVAL; alt = pcu->ctrl_intf->cur_altsetting; pcu->ep_ctrl = &alt->endpoint[0].desc; @@ -1670,6 +1672,8 @@ static int ims_pcu_parse_cdc_data(struct usb_interface *intf, struct ims_pcu *pc pcu->data_intf = usb_ifnum_to_if(pcu->udev, union_desc->bSlaveInterface0); + if (!pcu->data_intf) + return -EINVAL; alt = pcu->data_intf->cur_altsetting; if (alt->desc.bNumEndpoints != 2) { |