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| author |   Takashi Iwai <tiwai@suse.de> | 2016-07-04 14:02:15 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-07-04 14:02:15 +0200 |
| commit | 3fa6993fef634e05d200d141a85df0b044572364 (patch) | |
| tree | d42f578d6f7f0ef27f4f556a36afe643636e5ad1 /.get_maintainer.ignore | |
| parent | Merge tag 'asoc-fix-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus (diff) | |
| download | linux-dev-3fa6993fef634e05d200d141a85df0b044572364.tar.xz linux-dev-3fa6993fef634e05d200d141a85df0b044572364.zip | |
ALSA: timer: Fix negative queue usage by racy accesses
The user timer tu->qused counter may go to a negative value when
multiple concurrent reads are performed since both the check and the
decrement of tu->qused are done in two individual locked contexts.
This results in bogus read outs, and the endless loop in the
user-space side.
The fix is to move the decrement of the tu->qused counter into the
same spinlock context as the zero-check of the counter.
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to '.get_maintainer.ignore')
0 files changed, 0 insertions, 0 deletions