Takashi Iwai b55ffcb1bc ALSA: seq: Fix racy cell insertions during snd_seq_pool_done() ... commit c520ff3d03f0b5db7146d9beed6373ad5d2a5e0e upstream. When snd_seq_pool_done() is called, it marks the closing flag to refuse the further cell insertions. But snd_seq_pool_done() itself doesn't clear the cells but just waits until all cells are cleared by the caller side. That is, it's racy, and this leads to the endless stall as syzkaller spotted. This patch addresses the racy by splitting the setup of pool->closing flag out of snd_seq_pool_done(), and calling it properly before snd_seq_pool_done(). BugLink: http://lkml.kernel.org/r/CACT4Y+aqqy8bZA1fFieifNxR2fAfFQQABcBHj801+u5ePV0URw@mail.gmail.com Reported-and-tested-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-03-30 09:35:15 +02:00
..
oss	ALSA: pcm: Fix potential deadlock in OSS emulation	2016-02-17 12:30:59 -08:00
seq	ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()	2017-03-30 09:35:15 +02:00
compress_offload.c	ALSA: compress: Disable GET_CODEC_CAPS ioctl for some architectures	2016-02-17 12:30:58 -08:00
control.c	ALSA: ctl: Stop notification after disconnection	2016-07-27 09:47:38 -07:00
control_compat.c	ALSA: ctl: Fix ioctls for X32 ABI	2016-03-09 15:34:53 -08:00
ctljack.c	ALSA: jack: Fix endless loop at unique index detection	2015-06-26 06:59:57 +02:00
device.c	Merge branch 'topic/hda-unbind' into for-next	2015-03-16 14:48:20 +01:00
hrtimer.c	ALSA: hrtimer: Fix stall by hrtimer_cancel()	2016-01-31 11:28:57 -08:00
hwdep.c	ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS	2015-05-27 21:25:19 +02:00
hwdep_compat.c
info.c	ALSA: info: Limit the proc text input size	2016-11-18 10:48:33 +01:00
info_oss.c	ALSA: core: Clean up OSS proc file management	2015-04-24 17:31:08 +02:00
init.c	ALSA: Fix uninintialized error return	2015-06-29 19:08:31 +02:00
isadma.c	ALSA: core: Use standard printk helpers	2014-02-14 08:14:15 +01:00
jack.c	ALSA: jack: Remove MODULE_*() macros	2015-05-21 11:32:51 +02:00
Kconfig	ALSA: timer: add config item to export PCM timer disabling for expert	2015-10-16 14:31:38 +02:00
Makefile	ALSA: timer: add config item to export PCM timer disabling for expert	2015-10-16 14:31:38 +02:00
memalloc.c	genalloc: rename of_get_named_gen_pool() to of_gen_pool_get()	2015-06-30 19:45:01 -07:00
memory.c	ALSA: Include linux/uaccess.h and linux/bitopts.h instead of asm/*	2015-01-28 17:25:07 +01:00
misc.c	ALSA: Allow pass NULL dev for snd_pci_quirk_lookup()	2014-10-08 12:08:38 +02:00
pcm.c	ALSA: pcm: Free chmap at PCM free callback, too	2016-07-27 09:47:38 -07:00
pcm_compat.c	ALSA: pcm: Fix ioctls for X32 ABI	2016-03-09 15:34:54 -08:00
pcm_dmaengine.c	ALSA: Fix spelling typo in Documentation/DocBook/alsa-driver-api.xml	2015-03-04 12:12:59 +01:00
pcm_drm_eld.c	ALSA: pcm: add DRM ELD helper	2015-05-22 16:01:44 +02:00
pcm_iec958.c	ALSA: pcm: add IEC958 channel status helper	2015-05-22 16:01:47 +02:00
pcm_lib.c	ALSA: pcm : Call kill_fasync() in stream lock	2016-12-08 07:15:24 +01:00
pcm_memory.c	ALSA: Include linux/io.h instead of asm/io.h	2015-01-28 16:49:33 +01:00
pcm_misc.c	ALSA: pcm: Add big-endian DSD sample formats and fix XMOS DSD sample format	2014-11-21 15:13:28 +01:00
pcm_native.c	ALSA: pcm: Fix rwsem deadlock for non-atomic PCM stream	2016-02-25 12:01:13 -08:00
pcm_timer.c	ALSA: pcm: Use standard printk helpers	2014-02-14 08:14:15 +01:00
pcm_trace.h	ALSA: pcm: Replace PCM hwptr tracking with tracepoints	2014-11-04 14:09:14 +01:00
rawmidi.c	ALSA: rawmidi: Fix possible deadlock with virmidi registration	2016-09-15 08:27:53 +02:00
rawmidi_compat.c	ALSA: rawmidi: Fix ioctls X32 ABI	2016-03-09 15:34:54 -08:00
rtctimer.c	ALSA: timer: Use standard printk helpers	2014-02-14 08:14:17 +01:00
sgbuf.c	ALSA: core: Deletion of unnecessary checks before two function calls	2014-11-21 20:06:57 +01:00
sound.c	ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS	2015-05-27 21:25:19 +02:00
sound_oss.c	ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS	2015-05-27 21:25:19 +02:00
timer.c	ALSA: timer: Reject user params with too small ticks	2017-03-12 06:37:24 +01:00
timer_compat.c	ALSA: timer: Fix broken compat timer user status ioctl	2016-03-09 15:34:55 -08:00
vmaster.c	ALSA: core: Use standard printk helpers	2014-02-14 08:14:15 +01:00