ALSA: timer: Use deferred fasync helper

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[ Upstream commit 95cc637c1a ]

For avoiding the potential deadlock via kill_fasync() call, use the
new fasync helpers to defer the invocation from PCI API.  Note that
it's merely a workaround.

Reported-by: syzbot+1ee0910eca9c94f71f25@syzkaller.appspotmail.com
Reported-by: syzbot+49b10793b867871ee26f@syzkaller.appspotmail.com
Reported-by: syzbot+8285e973a41b5aa68902@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20220728125945.29533-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Takashi Iwai 2022-07-28 14:59:43 +02:00 • committed by Greg Kroah-Hartman

parent 2e1a19a391

commit 2dffd9478f

1 changed files with 6 additions and 5 deletions

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sound/core/timer.c

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