tree ce5d6e5934bcc95b5b368bf3ca6b0da688a19191
parent 189fb903afdbc37015dbe32dd75e9a96b9a5de28
author Takashi Iwai <tiwai@suse.de> 1573054977 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1578141574 +0100

ALSA: timer: Limit max amount of slave instances

[ Upstream commit fdea53fe5de532969a332d6e5e727f2ad8bf084d ]

The fuzzer tries to open the timer instances as much as possible, and
this may cause a system hiccup easily.  We've already introduced the
cap for the max number of available instances for the h/w timers, and
we should put such a limit also to the slave timers, too.

This patch introduces the limit to the multiple opened slave timers.
The upper limit is hard-coded to 1000 for now, which should suffice
for any practical usages up to now.

Link: https://lore.kernel.org/r/20191106154257.5853-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>