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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2013-12-10 14:02:40 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-11 19:47:40 (GMT) |
| commit | b601fa197fff265bf60eaf6950d4c194da080f4a (patch) | |
| tree | 5a4fe90c1aa07be39a0720e2149b0cf7d95262bd /net/ipv4 | |
| parent | 95ab09917a8187a02b518e22587c7f035edc7465 (diff) | |
| download | linux-b601fa197fff265bf60eaf6950d4c194da080f4a.tar.xz | |
ipv4: fix wildcard search with inet_confirm_addr()
Help of this function says: "in_dev: only on this interface, 0=any interface",
but since commit 39a6d0630012 ("[NETNS]: Process inet_confirm_addr in the
correct namespace."), the code supposes that it will never be NULL. This
function is never called with in_dev == NULL, but it's exported and may be used
by an external module.
Because this patch restore the ability to call inet_confirm_addr() with in_dev
== NULL, I partially revert the above commit, as suggested by Julian.
CC: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/arp.c | 4 | ||||
| -rw-r--r-- | net/ipv4/devinet.c | 9 |
2 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index f041858..b67cf80 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -381,6 +381,7 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) { + struct net *net = dev_net(in_dev->dev); int scope; switch (IN_DEV_ARP_IGNORE(in_dev)) { @@ -399,6 +400,7 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) case 3: /* Do not reply for scope host addresses */ sip = 0; scope = RT_SCOPE_LINK; + in_dev = NULL; break; case 4: /* Reserved */ case 5: @@ -410,7 +412,7 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) default: return 0; } - return !inet_confirm_addr(in_dev, sip, tip, scope); + return !inet_confirm_addr(net, in_dev, sip, tip, scope); } static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 6f49efc..84956f5 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1240,22 +1240,21 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, /* * Confirm that local IP address exists using wildcards: - * - in_dev: only on this interface, 0=any interface + * - net: netns to check, cannot be NULL + * - in_dev: only on this interface, NULL=any interface * - dst: only in the same subnet as dst, 0=any dst * - local: address, 0=autoselect the local address * - scope: maximum allowed scope value for the local address */ -__be32 inet_confirm_addr(struct in_device *in_dev, +__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, __be32 local, int scope) { __be32 addr = 0; struct net_device *dev; - struct net *net; - if (scope != RT_SCOPE_LINK) + if (in_dev != NULL) return confirm_addr_indev(in_dev, dst, local, scope); - net = dev_net(in_dev->dev); rcu_read_lock(); for_each_netdev_rcu(net, dev) { in_dev = __in_dev_get_rcu(dev); |