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| author | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-05-19 16:54:29 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-05-19 16:54:29 -0700 |
| commit | a3264435b4ca1ccee54cbef2970f2ba4bef39e2d (patch) | |
| tree | 179467e618008c397aff4d990fd0e6aad77edc2c /net | |
| parent | 44dc19c829c057dc78a5ffacaf851ac4c301eb58 (diff) | |
| download | linux-a3264435b4ca1ccee54cbef2970f2ba4bef39e2d.tar.gz linux-a3264435b4ca1ccee54cbef2970f2ba4bef39e2d.tar.bz2 linux-a3264435b4ca1ccee54cbef2970f2ba4bef39e2d.zip | |
ipv6 addrconf: Fix route lifetime setting in corner case.
Because of arithmetic overflow avoidance, the actual lifetime setting
(vs the value given by RA) did not increase monotonically around
0x7fffffff/HZ.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 12bba0880345..98aa50c11dd6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -475,7 +475,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, lifetime = ntohl(rinfo->lifetime); if (lifetime == 0xffffffff) { /* infinity */ - } else if (lifetime > 0x7fffffff/HZ) { + } else if (lifetime > 0x7fffffff/HZ - 1) { /* Avoid arithmetic overflow */ lifetime = 0x7fffffff/HZ - 1; } |