From 0c4f09ceec3d7afbef6ad4077d96e36e0fad4028 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 11 Nov 2019 18:36:42 +0100 Subject: [PATCH] ALSA: timer: Fix the breakage of slave link open A silly mistake was made while applying the fix for potential races in commit 6a34367e52ca ("ALSA: timer: Fix possible race at assigning a timer instance"): when a slave PCM is opened and succeeds, it doesn't return but proceeds to the master timer open code instead. Plug the hole and beautify a bit. Fixes: 6a34367e52ca ("ALSA: timer: Fix possible race at assigning a timer instance") Reported-by: syzbot+4476917c053f60112c99@syzkaller.appspotmail.com Link: https://lore.kernel.org/r/20191111173642.6093-1-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/core/timer.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/sound/core/timer.c b/sound/core/timer.c index 9091030..24fed5c 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -268,8 +268,7 @@ int snd_timer_open(struct snd_timer_instance *timeri, list_add_tail(&timeri->open_list, &snd_timer_slave_list); num_slaves++; err = snd_timer_check_slave(timeri); - if (err < 0) - goto close; + goto list_added; } /* open a master instance */ @@ -324,7 +323,7 @@ int snd_timer_open(struct snd_timer_instance *timeri, list_add_tail(&timeri->open_list, &timer->open_list_head); timer->num_instances++; err = snd_timer_check_master(timeri); - close: +list_added: if (err < 0) snd_timer_close_locked(timeri, &card_dev_to_put); -- 2.7.4