From 73e3dd6b45c4c870fc2641eb04c24e3f12dab1e0 Mon Sep 17 00:00:00 2001 From: Richard Cochran Date: Tue, 23 Apr 2013 01:56:34 +0000 Subject: e1000e: fix numeric overflow in phc settime method The PTP Hardware Clock settime function in the e1000e driver computes nanoseconds from a struct timespec. The code converts the seconds field .tv_sec by multiplying it with NSEC_PER_SEC. However, both operands are of type long, resulting in an unintended overflow. The patch fixes the issue by using the helper function from time.h. CC: stable Signed-off-by: Richard Cochran Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/e1000e/ptp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c index b477fa53ec94..065f8c80d4f2 100644 --- a/drivers/net/ethernet/intel/e1000e/ptp.c +++ b/drivers/net/ethernet/intel/e1000e/ptp.c @@ -145,8 +145,7 @@ static int e1000e_phc_settime(struct ptp_clock_info *ptp, unsigned long flags; u64 ns; - ns = ts->tv_sec * NSEC_PER_SEC; - ns += ts->tv_nsec; + ns = timespec_to_ns(ts); /* reset the timecounter */ spin_lock_irqsave(&adapter->systim_lock, flags); -- cgit v1.2.3-59-g8ed1b