Commit f56619fc authored Jun 26, 2010 by Ben Hutchings Committed by David S. Miller Jun 30, 2010

ipv6: Clamp reported valid_lft to a minimum of 0



Since addresses are only revalidated every 2 minutes, the reported
valid_lft can underflow shortly before the address is deleted.
Clamp it to a minimum of 0, as for prefered_lft.

Reported-by: Piotr Lewandowski <piotr.lewandowski@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5a9dbfe0

net/ipv6/addrconf.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -3495,8 +3495,12 @@ static int inet6_fill_ifaddr(struct sk_buff skb, struct inet6_ifaddr ifa,
		preferred -= tval;
		else
		preferred = 0;
		if (valid != INFINITY_LIFE_TIME)
		if (valid != INFINITY_LIFE_TIME) {
		if (valid > tval)
		valid -= tval;
		else
		valid = 0;
		}
		}
		} else {
		preferred = INFINITY_LIFE_TIME;