linux-toradex.git/sound/core/seq/seq_clientmgr.h, branch v4.9.128

ALSA: seq: Make ioctls race-free

2018-01-23T18:57:04+00:00

commit b3defb791b26ea0683a93a4f49c77ec45ec96f10 upstream.

The ALSA sequencer ioctls have no protection against racy calls while
the concurrent operations may lead to interfere with each other.  As
reported recently, for example, the concurrent calls of setting client
pool with a combination of write calls may lead to either the
unkillable dead-lock or UAF.

As a slightly big hammer solution, this patch introduces the mutex to
make each ioctl exclusive.  Although this may reduce performance via
parallel ioctl calls, usually it's not demanded for sequencer usages,
hence it should be negligible.

Reported-by: Luo Quan 
Reviewed-by: Kees Cook 
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: seq: Provide card number / PID via sequencer client info

2016-03-08T09:52:52+00:00

rawmidi devices expose the card number via IOCTLs, which allows to
find the corresponding device in sysfs.

The sequencer provides no identifing data. Chromium works around this
issue by scanning rawmidi as well as sequencer devices and matching
them by using assumtions, how the kernel register sequencer devices.

This changes adds support for exposing the card number for kernel clients
as well as the PID for user client.

The minor of the API version is changed to distinguish between the zero
initialised reserved field and card number 0.

[minor coding style fixes by tiwai]

Signed-off-by: Martin Koegler 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

[ALSA] sound/core/seq: move declarations of globally visible variables to proper headers

2008-01-31T16:29:35+00:00

sound/core/seq: move declarations of globally visible variables to proper headers

Signed-off-by: Marcin Ślusarz 
Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

[ALSA] semaphore -> mutex (core part)

2006-03-22T09:24:50+00:00

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Takashi Iwai

[ALSA] seq: remove struct snd_seq_client_callback

2006-01-03T11:30:47+00:00

The fields of struct snd_seq_client_callback either aren't used or are
always set to the same value, so we can get rid of it altogether.

Signed-off-by: Clemens Ladisch

[ALSA] seq: remove superfluous fields

2006-01-03T11:30:45+00:00

Modules: ALSA sequencer

None of the fields of struct snd_seq_kernel_client was actually used, so
remove them.

Signed-off-by: Clemens Ladisch

[ALSA] Remove xxx_t typedefs: Sequencer

2006-01-03T11:17:52+00:00

Modules: ALSA sequencer

Remove xxx_t typedefs from the core sequencer codes.

Signed-off-by: Takashi Iwai

Linux-2.6.12-rc2

2005-04-16T22:20:36+00:00

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!