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| author |   Takashi Iwai <tiwai@suse.de> | 2018-05-16 23:52:42 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-05-18 08:49:13 +0200 |
| commit | 9d4d207d1346329c5295420254f1dbef1a6ab6ba (patch) | |
| tree | 5fcb084352753cfd57e434768cbdb1f774257030 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | ALSA: seq: Avoid open-code for getting timer resolution (diff) | |
| download | wireguard-linux-9d4d207d1346329c5295420254f1dbef1a6ab6ba.tar.xz wireguard-linux-9d4d207d1346329c5295420254f1dbef1a6ab6ba.zip | |
ALSA: timer: Assure timer resolution access always locked
There are still many places calling the timer's hw.c_resolution
callback without lock, and this may lead to some races, as we faced in
the commit a820ccbe21e8 ("ALSA: pcm: Fix UAF at PCM release via PCM
timer access").
This patch changes snd_timer_resolution() to take the timer->lock for
avoiding the races. A place calling this function already inside the
lock (from the notifier) is replaced with the
snd_timer_hw_resolution() accordingly, as well as wrapping with the
lock around another place calling snd_timer_hw_resolution(), too.
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions