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clockevents: warn once when program_event() is called with negative expiry

The hrtimer problem with large relative timeouts resulting in a
negative expiry time went unnoticed as there is no check in the
clockevents_program_event() code. Put a check there with a WARN_ONCE
to avoid such problems in the future.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Thomas Gleixner 17 年 前
コミット
167b1de3ee
1 ファイル変更5 行追加0 行削除
  1. 5 0
      kernel/time/clockevents.c

+ 5 - 0
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)