Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  ACPI: move timer broadcast before busmaster disable
  clockevents: warn once when program_event() is called with negative expiry
  hrtimers: avoid overflow for large relative timeouts

2 files changed, 13 insertions, 0 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 22a25142e4cf..e65dd0b47cdc 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -850,6 +850,14 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
 #ifdef CONFIG_TIME_LOW_RES
                 tim = ktime_add(tim, base->resolution);
 #endif
+                /*
+                 * Careful here: User space might have asked for a
+                 * very long sleep, so the add above might result in a
+                 * negative number, which enqueues the timer in front
+                 * of the queue.
+                 */
+                if (tim.tv64 < 0)
+                        tim.tv64 = KTIME_MAX;
         }
         timer->expires = tim;
 
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 822beebe664a..5fb139fef9fa 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -78,6 +78,11 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires,
         unsigned long long clc;
         int64_t delta;
 
+        if (unlikely(expires.tv64 < 0)) {
+                WARN_ON_ONCE(1);
+                return -ETIME;
+        }
+
         delta = ktime_to_ns(ktime_sub(expires, now));
 
         if (delta <= 0)