diff options
author | Takashi Iwai <tiwai@suse.de> | 2018-07-26 14:27:59 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-22 07:48:36 +0200 |
commit | 8419b74a43fe4d6a3a4a6d33b00746f5446fb472 (patch) | |
tree | 5e129a62cf234a16f01d0fb2c86a18bdf8c90058 /sound/pci/cs5535audio/cs5535audio.h | |
parent | c48a18584d81b2fbdc1d7deba41525bfc9114255 (diff) |
ALSA: virmidi: Fix too long output trigger loop
commit 50e9ffb1996a5d11ff5040a266585bad4ceeca0a upstream.
The virmidi output trigger tries to parse the all available bytes and
process sequencer events as much as possible. In a normal situation,
this is supposed to be relatively short, but a program may give a huge
buffer and it'll take a long time in a single spin lock, which may
eventually lead to a soft lockup.
This patch simply adds a workaround, a cond_resched() call in the loop
if applicable. A better solution would be to move the event processor
into a work, but let's put a duct-tape quickly at first.
Reported-and-tested-by: Dae R. Jeong <threeearcat@gmail.com>
Reported-by: syzbot+619d9f40141d826b097e@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio.h')
0 files changed, 0 insertions, 0 deletions