tree 414b07ed6d979f9aad804dc16b4f280247741eaf
parent 27c3afe6e1cf129faac90405121203962da08ff4
author Xi Wang <xi.wang@gmail.com> 1329214728 -0500
committer Takashi Iwai <tiwai@suse.de> 1329314295 +0100

ALSA: usb-audio: avoid integer overflow in create_fixed_stream_quirk()

A malicious USB device could feed in a large nr_rates value.  This would
cause the subsequent call to kmemdup() to allocate a smaller buffer than
expected, leading to out-of-bounds access.

This patch validates the nr_rates value and reuses the limit introduced
in commit 4fa0e81b ("ALSA: usb-audio: fix possible hang and overflow
in parse_uac2_sample_rate_range()").

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>