[alsa-devel] [PATCH 2/2] ALSA: vmaster: Zero-clear ctl before calling slave get

Use kzalloc() instead of kmalloc() so that we don't need to rely fully on the slave get() callback to clear the control value that might be copied to user-space.

Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/vmaster.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c index b67de2bb06a2..9e96186742d0 100644 --- a/sound/core/vmaster.c +++ b/sound/core/vmaster.c @@ -63,7 +63,7 @@ static int slave_update(struct link_slave *slave) struct snd_ctl_elem_value *uctl; int err, ch;

- uctl = kmalloc(sizeof(*uctl), GFP_KERNEL); + uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); if (!uctl) return -ENOMEM; uctl->id = slave->slave.id;