Input: powermate - fix oops with malicious USB descriptors
authorJosh Boyer <jwboyer@fedoraproject.org>
Mon, 14 Mar 2016 16:33:40 +0000 (09:33 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Mon, 14 Mar 2016 16:36:49 +0000 (09:36 -0700)
commit9c6ba456711687b794dcf285856fc14e2c76074f
treed2b3ecc6afacca69b576081d21fc6a9b99bdec42
parent9979c1c70724ccca8fec10012e320b8145ad5368
Input: powermate - fix oops with malicious USB descriptors

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>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/misc/powermate.c