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(parent: 3d4e830) | patch
ALSA: usb-audio: Add sanity checks to FE parser
authorTakashi Iwai <tiwai@suse.de>
Tue, 21 Nov 2017 15:55:51 +0000 (16:55 +0100)
committerTakashi Iwai <tiwai@suse.de>
Tue, 21 Nov 2017 16:50:29 +0000 (17:50 +0100)
commitd937cd6790a2bef2d07b500487646bd794c039bb
treec4bb62fe1c2cdcec12c0ed4a9725e19545b1e540tree | snapshot
parent3d4e8303f2c747c8540a0a0126d0151514f6468bcommit | diff
ALSA: usb-audio: Add sanity checks to FE parser

When the usb-audio descriptor contains the malformed feature unit
description with a too short length, the driver may access
out-of-bounds.  Add a sanity check of the header size at the beginning
of parse_audio_feature_unit().

Fixes: 23caaf19b11e ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/mixer.c diff | blob | history
Domain: System / Kernel;