ALSA: pcm: Zero-clear reserved fields of PCM status ioctl in compat mode
authorTakashi Iwai <tiwai@suse.de>
Tue, 28 Oct 2014 11:42:19 +0000 (12:42 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Sun, 14 Dec 2014 16:23:52 +0000 (16:23 +0000)
commit5955adc323822ffe85c2bfd7c7e1224c1bfaca66
tree5aa2001476a4843c2f267618a83a0d3ce4c0cdde
parentcdeecb8176e2c86270af8f1aadb70869ac67a745
ALSA: pcm: Zero-clear reserved fields of PCM status ioctl in compat mode

commit 317168d0c766defd14b3d0e9c2c4a9a258b803ee upstream.

In compat mode, we copy each field of snd_pcm_status struct but don't
touch the reserved fields, and this leaves uninitialized values
there.  Meanwhile the native ioctl does zero-clear the whole
structure, so we should follow the same rule in compat mode, too.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
sound/core/pcm_compat.c