ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface()
authorDongxiang Ke <kdx.glider@gmail.com>
Tue, 6 Sep 2022 02:49:28 +0000 (10:49 +0800)
committerTakashi Iwai <tiwai@suse.de>
Tue, 6 Sep 2022 05:14:32 +0000 (07:14 +0200)
commite53f47f6c1a56d2af728909f1cb894da6b43d9bf
treea065b80b59cf43f2cbe60c93e52f47c6c05f549e
parent8d44e6044a0e885acdd01813768a0b27906d64fd
ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface()

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>
sound/usb/stream.c