Commit a1faa698 authored by Jens Rosenboom's avatar Jens Rosenboom Committed by David S. Miller
Browse files

ipv6: avoid wraparound for expired preferred lifetime 



Avoid showing wrong high values when the preferred lifetime of an address
is expired.

Signed-off-by: default avatarJens Rosenboom <me@jayr.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1ac530b3

net/ipv6/addrconf.c

+4 −1
Original line number Original line Diff line number Diff line
@@ -3362,7 +3362,10 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, 
		valid = ifa->valid_lft;

		valid = ifa->valid_lft;

		if (preferred != INFINITY_LIFE_TIME) {

		if (preferred != INFINITY_LIFE_TIME) {

			long tval = (jiffies - ifa->tstamp)/HZ;

			long tval = (jiffies - ifa->tstamp)/HZ;

			if (preferred > tval)

				preferred -= tval;

				preferred -= tval;

			else

				preferred = 0;

			if (valid != INFINITY_LIFE_TIME)

			if (valid != INFINITY_LIFE_TIME)

				valid -= tval;

				valid -= tval;

		}

		}

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