ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface()

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commit e53f47f6c1 upstream.

There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and
the number of it's interfaces less than 4, an out-of-bounds read bug occurs
when parsing the interface descriptor for this device.

Fix this by checking the number of interfaces.

Signed-off-by: Dongxiang Ke <kdx.glider@gmail.com>
Link: https://lore.kernel.org/r/20220906024928.10951-1-kdx.glider@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dongxiang Ke 2022-09-06 10:49:28 +08:00 • committed by Greg Kroah-Hartman

parent ef38df2b19

commit 8293e61bbf

1 changed files with 1 additions and 1 deletions

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sound/usb/stream.c

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