From fe0517f893d36636de20d0a809fc0c788ca0cade Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 21 Aug 2019 21:09:17 +0200 Subject: [PATCH] posix-cpu-timers: Respect INFINITY for hard RTTIME limit The RTIME limit expiry code does not check the hard RTTIME limit for INFINITY, i.e. being disabled. Add it. While this could be considered an ABI breakage if something would depend on this behaviour. Though it's highly unlikely to have an effect because RLIM_INFINITY is at minimum INT_MAX and the RTTIME limit is in seconds, so the timer would fire after ~68 years. Adding this obvious correct limit check also allows further consolidation of that code and is a prerequisite for cleaning up the 0 based checks and the rlimit setter code. Signed-off-by: Thomas Gleixner Reviewed-by: Frederic Weisbecker Link: https://lkml.kernel.org/r/20190821192922.078293002@linutronix.de --- kernel/time/posix-cpu-timers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index e62139a89375..a738d7659915 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -921,7 +921,7 @@ static void check_process_timers(struct task_struct *tsk, unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU); unsigned long psecs = div_u64(ptime, NSEC_PER_SEC); - if (psecs >= hard) { + if (hard != RLIM_INFINITY && psecs >= hard) { /* * At the hard limit, we just die. * No need to calculate anything else now.