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authorRichard Cochran <richardcochran@gmail.com>2013-04-22 21:56:34 -0400
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2013-04-25 21:30:02 -0400
commit73e3dd6b45c4c870fc2641eb04c24e3f12dab1e0 (patch)
treec910921b9519b792c7a1f43963bb7804e7c714c4
parent3a4e0d6a95b2b6f7b22eb7c7361a0fc4289478eb (diff)
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 <stable@vger.kernel.org> Signed-off-by: Richard Cochran <richardcochran@gmail.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r--drivers/net/ethernet/intel/e1000e/ptp.c3
1 files changed, 1 insertions, 2 deletions
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,
145 unsigned long flags; 145 unsigned long flags;
146 u64 ns; 146 u64 ns;
147 147
148 ns = ts->tv_sec * NSEC_PER_SEC; 148 ns = timespec_to_ns(ts);
149 ns += ts->tv_nsec;
150 149
151 /* reset the timecounter */ 150 /* reset the timecounter */
152 spin_lock_irqsave(&adapter->systim_lock, flags); 151 spin_lock_irqsave(&adapter->systim_lock, flags);