From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
alsa-devel@alsa-project.org, Takashi Iwai <tiwai@suse.de>,
wangwensheng4@huawei.com,
syzbot+49b10793b867871ee26f@syzkaller.appspotmail.com,
tiwai@suse.com,
syzbot+1ee0910eca9c94f71f25@syzkaller.appspotmail.com,
syzbot+8285e973a41b5aa68902@syzkaller.appspotmail.com
Subject: [PATCH AUTOSEL 5.18 30/39] ALSA: timer: Use deferred fasync helper
Date: Sun, 14 Aug 2022 12:23:19 -0400 [thread overview]
Message-ID: <20220814162332.2396012-30-sashal@kernel.org> (raw)
In-Reply-To: <20220814162332.2396012-1-sashal@kernel.org>
From: Takashi Iwai <tiwai@suse.de>
[ 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 | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/sound/core/timer.c b/sound/core/timer.c
index b3214baa8919..e08a37c23add 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -83,7 +83,7 @@ struct snd_timer_user {
unsigned int filter;
struct timespec64 tstamp; /* trigger tstamp */
wait_queue_head_t qchange_sleep;
- struct fasync_struct *fasync;
+ struct snd_fasync *fasync;
struct mutex ioctl_lock;
};
@@ -1345,7 +1345,7 @@ static void snd_timer_user_interrupt(struct snd_timer_instance *timeri,
}
__wake:
spin_unlock(&tu->qlock);
- kill_fasync(&tu->fasync, SIGIO, POLL_IN);
+ snd_kill_fasync(tu->fasync, SIGIO, POLL_IN);
wake_up(&tu->qchange_sleep);
}
@@ -1383,7 +1383,7 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
spin_lock_irqsave(&tu->qlock, flags);
snd_timer_user_append_to_tqueue(tu, &r1);
spin_unlock_irqrestore(&tu->qlock, flags);
- kill_fasync(&tu->fasync, SIGIO, POLL_IN);
+ snd_kill_fasync(tu->fasync, SIGIO, POLL_IN);
wake_up(&tu->qchange_sleep);
}
@@ -1453,7 +1453,7 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
spin_unlock(&tu->qlock);
if (append == 0)
return;
- kill_fasync(&tu->fasync, SIGIO, POLL_IN);
+ snd_kill_fasync(tu->fasync, SIGIO, POLL_IN);
wake_up(&tu->qchange_sleep);
}
@@ -1521,6 +1521,7 @@ static int snd_timer_user_release(struct inode *inode, struct file *file)
snd_timer_instance_free(tu->timeri);
}
mutex_unlock(&tu->ioctl_lock);
+ snd_fasync_free(tu->fasync);
kfree(tu->queue);
kfree(tu->tqueue);
kfree(tu);
@@ -2135,7 +2136,7 @@ static int snd_timer_user_fasync(int fd, struct file * file, int on)
struct snd_timer_user *tu;
tu = file->private_data;
- return fasync_helper(fd, file, on, &tu->fasync);
+ return snd_fasync_helper(fd, file, on, &tu->fasync);
}
static ssize_t snd_timer_user_read(struct file *file, char __user *buffer,
--
2.35.1
next prev parent reply other threads:[~2022-08-14 16:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220814162332.2396012-1-sashal@kernel.org>
2022-08-14 16:22 ` [PATCH AUTOSEL 5.18 08/39] ALSA: hda: Fix page fault in snd_hda_codec_shutdown() Sasha Levin
2022-08-14 16:22 ` [PATCH AUTOSEL 5.18 10/39] ASoC: rsnd: care default case on rsnd_ssiu_busif_err_irq_ctrl() Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 16/39] ALSA: hda/realtek: Enable speaker and mute LEDs for HP laptops Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 17/39] ASoC: SOF: Intel: hda: add sanity check on SSP index reported by NHLT Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 18/39] ASoC: Intel: sof_es8336: Fix GPIO quirks set via module option Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 19/39] ASoC: Intel: sof_es8336: ignore GpioInt when looking for speaker/headset GPIO lines Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 20/39] ASoC: Intel: sof_nau8825: Move quirk check to the front in late probe Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 26/39] ASoC: codecs: va-macro: use fsgen as clock Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 29/39] ALSA: core: Add async signal helpers Sasha Levin
2022-08-14 16:23 ` Sasha Levin [this message]
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 31/39] ALSA: pcm: Use deferred fasync helper Sasha Levin
2022-08-14 16:23 ` [PATCH AUTOSEL 5.18 32/39] ALSA: control: " Sasha Levin
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