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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-06-24 21:42:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-25 16:27:28 -0700 |
| commit | dc8482926e2b1006ed6962ac8388cb92aed4efc7 (patch) | |
| tree | c4d2ff3316fbc20cb942e7ea443f4c88f60a70ab /net | |
| parent | 4c7ab054ab4f5d63625508ed6f8a607184cae7c2 (diff) | |
| download | linux-dc8482926e2b1006ed6962ac8388cb92aed4efc7.tar.gz | |
ipv6: check return value of ipv6_get_lladdr
We should check the return value of ipv6_get_lladdr in inet6_set_iftoken. A possible situation, which could leave ll_addr unassigned is, when the user removed her link-local address but a global scoped address was already set. In this case the interface would still be IF_READY and not dead. In that case the RS source address is some value from the stack. v2: Daniel Borkmann noted a small indent inconstancy; no semantic changes. Cc: Daniel Borkmann <dborkman@redhat.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Reviewed-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 77b626136c23..4ab4c38958c6 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -4306,6 +4306,7 @@ static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) struct inet6_ifaddr *ifp; struct net_device *dev = idev->dev; bool update_rs = false; + struct in6_addr ll_addr; if (token == NULL) return -EINVAL; @@ -4325,11 +4326,9 @@ static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) write_unlock_bh(&idev->lock); - if (!idev->dead && (idev->if_flags & IF_READY)) { - struct in6_addr ll_addr; - - ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | - IFA_F_OPTIMISTIC); + if (!idev->dead && (idev->if_flags & IF_READY) && + !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | + IFA_F_OPTIMISTIC)) { /* If we're not ready, then normal ifup will take care * of this. Otherwise, we need to request our rs here. |