ALSA: line6: Zero-initialize message buffers

ALSA: line6: Zero-initialize message buffers

[ Upstream commit c4e51e424e2c772ce1836912a8b0b87cd61bc9d5 ]

For shutting up spurious KMSAN uninit-value warnings, just replace
kmalloc() calls with kzalloc() for the buffers used for
communications.  There should be no real issue with the original code,
but it's still better to cover.

Reported-by: syzbot+7fb05ccf7b3d2f9617b3@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/r/00000000000084b18706150bcca5@google.com
Message-ID: <20240402063628.26609-1-tiwai@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>