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linux/sound/core/seq
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Takashi Iwai 2cdc7b636d ALSA: seq: Fix yet another races among ALSA timer accesses 
ALSA sequencer may open/close and control ALSA timer instance
dynamically either via sequencer events or direct ioctls.  These are
done mostly asynchronously, and it may call still some timer action
like snd_timer_start() while another is calling snd_timer_close().
Since the instance gets removed by snd_timer_close(), it may lead to
a use-after-free.

This patch tries to address such a race by protecting each
snd_timer_*() call via the existing spinlock and also by avoiding the
access to timer during close call.

BugLink: http://lkml.kernel.org/r/CACT4Y+Z6RzW5MBr-HUdV-8zwg71WQfKTdPpYGvOeS7v4cyurNQ@mail.gmail.com
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-02-01 12:23:29 +01:00
..
oss ALSA: seq: Degrade the error message for too many opens 2016-01-25 11:52:23 +01:00
Kconfig
Makefile ALSA: core: Fix randconfig build wrt CONFIG_PROC_FS 2015-05-29 07:21:02 +02:00
seq.c Subject: ALSA: seq: Remove autoload locks in driver registration 2014-10-18 20:25:19 +02:00
seq_clientmgr.c ALSA: seq: Fix missing NULL check at remove_events ioctl 2016-01-12 17:21:48 +01:00
seq_clientmgr.h
seq_compat.c ALSA: seq: Fix snd_seq_call_port_info_ioctl in compat mode 2016-01-18 14:39:13 +01:00
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: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:41:18 +01:00
seq_fifo.h
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
seq_lock.h
seq_memory.c ALSA: seq: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:41:18 +01:00
seq_memory.h
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
seq_ports.c ALSA: seq: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:41:18 +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
seq_queue.c ALSA: seq: Fix race at timer setup and close 2016-01-12 17:50:41 +01:00
seq_queue.h
seq_system.c
seq_system.h
seq_timer.c ALSA: seq: Fix yet another races among ALSA timer accesses 2016-02-01 12:23:29 +01:00
seq_timer.h
seq_virmidi.c ALSA: seq: Fix race at closing in virmidi driver 2016-02-01 12:21:46 +01:00