ALSA: usb-audio: Add sanity checks to FE parser

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commit d937cd6790 upstream.

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: 23caaf19b1 ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Takashi Iwai 2017-11-21 16:55:51 +01:00 • committed by Ben Hutchings

parent 0fcc050bb0

commit 9aeaf942b7

1 changed files with 12 additions and 0 deletions

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sound/usb/mixer.c

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