tree d8429b3e98516f34c872fc91e2537d2013305e9a
parent 9586495dc3011a80602329094e746dbce16cb1f1
author Takashi Iwai <tiwai@suse.de> 1453122760 +0100
committer Takashi Iwai <tiwai@suse.de> 1453124407 +0100

ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0

When a TLV ioctl with numid zero is handled, the driver may spew a
kernel warning with a stack trace at each call.  The check was
intended obviously only for a kernel driver, but not for a user
interaction.  Let's fix it.

This was spotted by syzkaller fuzzer.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>