diff options
| author | stephen hemminger <shemminger@vyatta.com> | 2010-06-21 11:00:13 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-25 21:16:57 -0700 |
| commit | 9f888160bdcccf0565dd2774956b8d9456e610be (patch) | |
| tree | 6366fff5417a97bbecdfe4d5f4e63c6fe5cb1b97 /net/ipv6/ndisc.c | |
| parent | 1a61a83ff59378a5613d8c706c4a660c353b62a8 (diff) | |
ipv6: fix NULL reference in proxy neighbor discovery
The addition of TLLAO option created a kernel OOPS regression
for the case where neighbor advertisement is being sent via
proxy path. When using proxy, ipv6_get_ifaddr() returns NULL
causing the NULL dereference.
Change causing the bug was:
commit f7734fdf61ec6bb848e0bafc1fb8bad2c124bb50
Author: Octavian Purdila <opurdila@ixiacom.com>
Date: Fri Oct 2 11:39:15 2009 +0000
make TLLAO option for NA packets configurable
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
| -rw-r--r-- | net/ipv6/ndisc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 0abdc242ddb7..2efef52fb461 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -586,6 +586,7 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, src_addr = solicited_addr; if (ifp->flags & IFA_F_OPTIMISTIC) override = 0; + inc_opt |= ifp->idev->cnf.force_tllao; in6_ifa_put(ifp); } else { if (ipv6_dev_get_saddr(dev_net(dev), dev, daddr, @@ -599,7 +600,6 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, icmp6h.icmp6_solicited = solicited; icmp6h.icmp6_override = override; - inc_opt |= ifp->idev->cnf.force_tllao; __ndisc_send(dev, neigh, daddr, src_addr, &icmp6h, solicited_addr, inc_opt ? ND_OPT_TARGET_LL_ADDR : 0); |