ALSA: usb-audio: Add sanity checks in v2 clock parsers

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The helper functions to parse and look for the clock source, selector
and multiplier unit may return the descriptor with a too short length
than required, while there is no sanity check in the caller side.
Add some sanity checks in the parsers, at least, to guarantee the
given descriptor size, for avoiding the potential crashes.

Fixes: 79f920fbff ("ALSA: usb-audio: parse clock topology of UAC2 devices")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Iwai 2017-11-21 17:28:06 +01:00

parent 8428a8ebde

commit 0a62d6c966

1 changed files with 6 additions and 3 deletions

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sound/usb/clock.c

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