ALSA: usb-audio: Fix NULL dereference in create_fixed_stream_quirk()

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commit 0f886ca127 upstream.

create_fixed_stream_quirk() may cause a NULL-pointer dereference by
accessing the non-existing endpoint when a USB device with a malformed
USB descriptor is used.

This patch avoids it simply by adding a sanity check of bNumEndpoints
before the accesses.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=971125
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Moritz Muehlenhoff <jmm@inutil.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Takashi Iwai 2016-03-15 12:09:10 +01:00 • committed by Luis Henriques

parent 02a21306af

commit b92dbabac3

1 changed files with 6 additions and 0 deletions

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sound/usb/quirks.c

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