Takashi Iwai 1117b7a380 ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
commit f4351a199cc120ff9d59e06d02e8657d08e6cc46 upstream.

The parser for the processing unit reads bNrInPins field before the
bLength sanity check, which may lead to an out-of-bound access when a
malformed descriptor is given.  Fix it by assignment after the bLength
check.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-13 10:01:05 +01:00
..
2017-09-04 14:50:49 +02:00
2017-08-31 11:02:15 +02:00