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Message-Id: <1366952231-16727-2-git-send-email-jeffrey.t.kirsher@intel.com> Date: Thu, 25 Apr 2013 21:57:04 -0700 From: Jeff Kirsher <jeffrey.t.kirsher@...el.com> To: davem@...emloft.net Cc: Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com, stable <stable@...r.kernel.org>, Jeff Kirsher <jeffrey.t.kirsher@...el.com> Subject: [net-next 1/8] e1000e: fix numeric overflow in phc settime method From: Richard Cochran <richardcochran@...il.com> 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 <stable@...r.kernel.org> Signed-off-by: Richard Cochran <richardcochran@...il.com> Tested-by: Aaron Brown <aaron.f.brown@...el.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com> --- drivers/net/ethernet/intel/e1000e/ptp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c index b477fa5..065f8c8 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); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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