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ALSA: timer: Use deferred fasync helper
authorTakashi Iwai <tiwai@suse.de>
Thu, 28 Jul 2022 12:59:43 +0000 (14:59 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 Aug 2022 09:09:31 +0000 (11:09 +0200)
commit900c508f6d15150396060e96fbb969df9fd54b10
tree447f2c749b70a454486331a3d21b08c60cd362b7tree | snapshot (tar.gz zip)
parent6cc1e76104fdc3768dbdd790a4d84303c585f86fcommit | diff
ALSA: timer: Use deferred fasync helper

[ Upstream commit 95cc637c1afd83fb7dd3d7c8a53710488f4caf9c ]

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>
sound/core/timer.c diff | blob | blame | history