diff options
| author | Josh Boyer <jwboyer@fedoraproject.org> | 2016-03-14 09:33:40 -0700 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-04-11 16:44:09 +0200 |
| commit | 4f5d9400a57200b8a9f6a683a7beadd159ac09e1 (patch) | |
| tree | 0abda6784e43d2af829036feadb4891a83cb8584 /drivers/input | |
| parent | 59d81b6e6b258f6200565e608ddc8f911b0b0146 (diff) | |
Input: powermate - fix oops with malicious USB descriptors
commit 9c6ba456711687b794dcf285856fc14e2c76074f upstream.
The powermate driver expects at least one valid USB endpoint in its
probe function. If given malicious descriptors that specify 0 for
the number of endpoints, it will crash. Validate the number of
endpoints on the interface before using them.
The full report for this issue can be found here:
http://seclists.org/bugtraq/2016/Mar/85
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/misc/powermate.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/misc/powermate.c b/drivers/input/misc/powermate.c index 49c0c3ebd321..21ce1cf757bb 100644 --- a/drivers/input/misc/powermate.c +++ b/drivers/input/misc/powermate.c @@ -308,6 +308,9 @@ static int powermate_probe(struct usb_interface *intf, const struct usb_device_i int error = -ENOMEM; interface = intf->cur_altsetting; + if (interface->desc.bNumEndpoints < 1) + return -EINVAL; + endpoint = &interface->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) return -EIO; |