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Filename Latest commit message Latest commit date
Takashi Iwai 76f87b11a4 ALSA: core: Add async signal helpers 
[ Upstream commit ef34a0ae7a2654bc9e58675e36898217fb2799d8 ]

Currently the call of kill_fasync() from an interrupt handler might
lead to potential spin deadlocks, as spotted by syzkaller.
Unfortunately, it's not so trivial to fix this lock chain as it's
involved with the tasklist_lock that is touched in allover places.

As a temporary workaround, this patch provides the way to defer the
async signal notification in a work.  The new helper functions,
snd_fasync_helper() and snd_kill_faync() are replacements for
fasync_helper() and kill_fasync(), respectively.  In addition,
snd_fasync_free() needs to be called at the destructor of the relevant
file object.

Link: https://lore.kernel.org/r/20220728125945.29533-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-25 11:18:37 +02:00
..
ac97
sof Merge branch 'asoc-5.4' into asoc-next 2019-09-09 14:55:20 +01:00
ac97_codec.h
aci.h
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ad1843.h
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aess.h
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alc5623.h
asequencer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
asound.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
asoundef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
compress_driver.h ALSA: compress: fix partial_drain completion state 2020-07-16 08:16:39 +02:00
control.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
core.h ALSA: core: Add async signal helpers 2022-08-25 11:18:37 +02:00
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dmaengine_pcm.h
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gus.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hda_chmap.h
hda_codec.h ALSA: hda: fix jack detection with Realtek codecs when in D3 2020-10-29 09:57:25 +01:00
hda_component.h
hda_hwdep.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 32 2019-05-24 17:27:10 +02:00
hda_i915.h
hda_register.h ALSA: hdac: clear link output stream mapping 2019-10-07 03:58:48 +02:00
hda_regmap.h ALSA: hda: Manage concurrent reg access more properly 2020-05-27 17:46:37 +02:00
hda_verbs.h
hdaudio.h ALSA: hda: Manage concurrent reg access more properly 2020-05-27 17:46:37 +02:00
hdaudio_ext.h ALSA: hda: hdac_ext_stream: fix potential locking issues 2021-11-26 10:47:23 +01:00
hdmi-codec.h ASoC: hdmi-codec: Add an op to set callback function for plug event 2019-09-09 14:50:03 +01:00
hwdep.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
i2c.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
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intel-nhlt.h ALSA: hda: intel-nhlt: verify config type 2021-03-09 11:09:39 +01:00
jack.h ALSA: jack: Access input_dev under mutex 2022-06-14 18:11:25 +02:00
l3.h
madera-pdata.h ASoC: madera: Update SPDX headers 2019-06-26 12:27:50 +01:00
max9768.h
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omap-hdmi-audio.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
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opl4.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pcm-indirect.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
pcm.h ALSA: pcm: Fix potential AB/BA lock with buffer_mutex and mmap_lock 2022-05-12 12:23:49 +02:00
pcm_drm_eld.h
pcm_iec958.h
pcm_oss.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
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pt2258.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pxa2xx-lib.h
rawmidi.h ALSA: rawmidi: Fix racy buffer resize under concurrent accesses 2020-05-20 08:20:30 +02:00
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rt5670.h ASoC: rt5670: Add new gpio1_is_ext_spk_en quirk and enable it on the Lenovo Miix 2 10 2020-07-29 10:18:45 +02:00
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s3c24xx_uda134x.h
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sh_fsi.h
simple_card.h
simple_card_utils.h ASoC: simple_card_utils.h: Add missing include 2020-01-17 19:48:33 +01:00
snd_wavefront.h
soc-acpi-intel-match.h ASoC: Intel: common: add ACPI matching tables for EHL 2019-08-15 18:13:21 +01:00
soc-acpi.h
soc-component.h ASoC: soc-component: add snd_soc_pcm_component_pcm_free() 2019-08-05 16:27:16 +01:00
soc-dai.h ASoC: soc-dai: use bit field for bus_control 2019-08-22 18:30:26 +01:00
soc-dapm.h Merge branch 'asoc-5.4' into asoc-next 2019-09-09 14:55:20 +01:00
soc-dpcm.h ASoC: soc-core: define soc_dpcm_debugfs_add() for non CONFIG_DEBUG_FS 2019-08-08 20:56:57 +01:00
soc-topology.h
soc.h ASoC: soc-core: disable route checks for legacy devices 2020-05-02 08:49:01 +02:00
sof.h
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