ALSA: seq: Fix snd_seq_call_port_info_ioctl in compat mode
authorNicolas Boichat <drinkcat@chromium.org>
Mon, 18 Jan 2016 13:35:01 +0000 (21:35 +0800)
committerTakashi Iwai <tiwai@suse.de>
Mon, 18 Jan 2016 13:39:13 +0000 (14:39 +0100)
commit9586495dc3011a80602329094e746dbce16cb1f1
tree2d4f530337ac3bf67efaa8c4828a26be2849904b
parent43c54b8c7cfe22f868a751ba8a59abf1724160b1
ALSA: seq: Fix snd_seq_call_port_info_ioctl in compat mode

This reverts one hunk of
commit ef44a1ec6eee ("ALSA: sound/core: use memdup_user()"), which
replaced a number of kmalloc followed by memcpy with memdup calls.

In this case, we are copying from a struct snd_seq_port_info32 to a
struct snd_seq_port_info, but the latter is 4 bytes longer than the
32-bit version, so we need to separate kmalloc and copy calls.

Fixes: ef44a1ec6eee ('ALSA: sound/core: use memdup_user()')
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/core/seq/seq_compat.c