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| author | Oliver Neukum <oneukum@suse.com> | 2016-03-17 14:00:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-12 07:33:48 -0700 |
| commit | cadaf14c349dfd9dae5113a53f0d7f6d49b9d4ef (patch) | |
| tree | 5ce970c94bab6183f0c75fe2788055455967d6b7 /drivers/input | |
| parent | 2c84af5604ae7bb60f2709da908a81e63394b0ed (diff) | |
| download | linux-stable-cadaf14c349dfd9dae5113a53f0d7f6d49b9d4ef.tar.gz linux-stable-cadaf14c349dfd9dae5113a53f0d7f6d49b9d4ef.tar.bz2 linux-stable-cadaf14c349dfd9dae5113a53f0d7f6d49b9d4ef.zip | |
Input: ims-pcu - sanity check against missing interfaces
commit a0ad220c96692eda76b2e3fd7279f3dcd1d8a8ff upstream.
A malicious device missing interface can make the driver oops.
Add sanity checking.
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/input')
| -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) { |