Takashi Iwai c520ff3d03 ALSA: seq: Fix racy cell insertions during snd_seq_pool_done() ... 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> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>		2017-03-21 14:01:10 +01:00
..
oss	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
Kconfig	ALSA: clean up the logic for building sequencer modules	2009-05-29 11:49:42 +02:00
Makefile	ALSA: core: Fix randconfig build wrt CONFIG_PROC_FS	2015-05-29 07:21:02 +02:00
seq.c	ALSA: timer: remove legacy rtctimer	2016-04-25 10:41:46 +02:00
seq_clientmgr.c	ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()	2017-03-21 14:01:10 +01:00
seq_clientmgr.h	ALSA: seq: Provide card number / PID via sequencer client info	2016-03-08 10:52:52 +01:00
seq_compat.c	ALSA: seq: fix passing wrong pointer in function call of compatibility layer	2016-10-12 20:09:36 +02:00
seq_device.c	ALSA: core: Fix randconfig build wrt CONFIG_PROC_FS	2015-05-29 07:21:02 +02:00
seq_dummy.c	ALSA: seq: Drop snd_seq_autoload_lock() and _unlock()	2015-02-12 14:42:31 +01:00
seq_fifo.c	ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()	2017-03-21 14:01:10 +01:00
seq_fifo.h	[ALSA] Remove xxx_t typedefs: Sequencer	2006-01-03 12:17:52 +01:00
seq_info.c	ALSA: core: Build conditionally and remove superfluous ifdefs	2015-04-24 17:31:07 +02:00
seq_info.h	ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS	2015-05-27 21:25:19 +02:00
seq_lock.c	ALSA: seq: Use standard printk helpers	2014-02-14 08:14:18 +01:00
seq_lock.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
seq_memory.c	ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()	2017-03-21 14:01:10 +01:00
seq_memory.h	ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()	2017-03-21 14:01:10 +01:00
seq_midi.c	ALSA: seq: Drop snd_seq_autoload_lock() and _unlock()	2015-02-12 14:42:31 +01:00
seq_midi_emul.c	ALSA: seq: potential out of bounds in do_control()	2015-02-12 11:07:48 +01:00
seq_midi_event.c	sound: Add module.h to the previously silent sound users	2011-10-31 19:31:21 -04:00
seq_ports.c	ALSA: seq: Fix double port list deletion	2016-02-16 14:37:19 +01:00
seq_ports.h	ALSA: seq: remove unused callback_all field	2015-01-26 13:56:58 +01:00
seq_prioq.c	ALSA: seq: Drop superfluous error/debug messages after malloc failures	2015-03-10 15:41:18 +01:00
seq_prioq.h	[ALSA] Remove xxx_t typedefs: Sequencer	2006-01-03 12:17:52 +01:00
seq_queue.c	ALSA: seq: Fix race at creating a queue	2017-02-08 12:42:37 +01:00
seq_queue.h	[ALSA] semaphore -> mutex (core part)	2006-03-22 10:24:50 +01:00
seq_system.c	sound: Add export.h for THIS_MODULE/EXPORT_SYMBOL where needed	2011-10-31 19:31:22 -04:00
seq_system.h	[ALSA] Remove xxx_t typedefs: Sequencer	2006-01-03 12:17:52 +01:00
seq_timer.c	ALSA: seq: Fix time account regression	2016-10-25 16:00:46 +02:00
seq_timer.h	ALSA: seq_timer: use monotonic times internally	2016-06-17 22:56:13 +02:00
seq_virmidi.c	ALSA: seq: Constify snd_rawmidi_ops	2017-01-12 12:49:55 +01:00