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| author | Ben Hutchings <ben@decadent.org.uk> | 2010-06-26 11:37:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-30 10:28:43 -0700 |
| commit | f56619fc72407561b00c52244a2caa53d730bc4a (patch) | |
| tree | 9201b8700d4f8e185def920261a3cb718494cdcb /net/ipv6/addrconf.c | |
| parent | 5a9dbfe08ee17f0dc9ecff647eba3d04afa01200 (diff) | |
| download | blackbird-obmc-linux-f56619fc72407561b00c52244a2caa53d730bc4a.tar.gz blackbird-obmc-linux-f56619fc72407561b00c52244a2caa53d730bc4a.zip | |
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>
Diffstat (limited to 'net/ipv6/addrconf.c')
| -rw-r--r-- | net/ipv6/addrconf.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index c20a7c260a8f..51a273fe3d21 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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) - valid -= tval; + if (valid != INFINITY_LIFE_TIME) { + if (valid > tval) + valid -= tval; + else + valid = 0; + } } } else { preferred = INFINITY_LIFE_TIME; |
