gistfile1.txt

// autogenerated by syzkaller (http://github.com/google/syzkaller)
#include <pthread.h>
#include <sys/timerfd.h>

#define NTHR 8
#define NSET 8
#define TFD_TIMER_CANCEL_ON_SET (1 << 1)

void *thrset(void *arg)
{
	int fd = (long)arg;
	struct itimerspec its, old;
	its.it_interval.tv_sec = 0;
	its.it_interval.tv_sec = 10000;
	timerfd_settime(fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, &old);
	return 0;
}

void *thr(void *arg)
{
	for (;;) {
		int fd = timerfd_create(CLOCK_REALTIME, 0);
		int i;
		pthread_t th[NSET];
		for (i = 0; i < NSET; i++)
			pthread_create(&th[i], 0, thrset, (void*)(long)fd);
		for (i = 0; i < NSET; i++)
			pthread_join(th[i], 0);
		close(fd);
	}
	return 0;
}

int main()
{
	int i;
	pthread_t th[NTHR];
	for (i = 0; i < NTHR; i++)
		pthread_create(&th[i], 0, thr, 0);
	for (i = 0; i < NTHR; i++)
		pthread_join(th[i], 0);
	return 0;
}