diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2007-09-12 11:02:17 (GMT) |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 23:49:09 (GMT) |
commit | e9dc86534051b78e41e5b746cccc291b57a3a311 (patch) | |
tree | 1cd4a1dde4c51b6311749428a22cc8a8f5436825 /net/ipv4 | |
parent | e730c15519d09ea528b4d2f1103681fa5937c0e6 (diff) | |
download | linux-e9dc86534051b78e41e5b746cccc291b57a3a311.tar.xz |
[NET]: Make device event notification network namespace safe
Every user of the network device notifiers is either a protocol
stack or a pseudo device. If a protocol stack that does not have
support for multiple network namespaces receives an event for a
device that is not in the initial network namespace it quite possibly
can get confused and do the wrong thing.
To avoid problems until all of the protocol stacks are converted
this patch modifies all netdev event handlers to ignore events on
devices that are not in the initial network namespace.
As the rest of the code is made network namespace aware these
checks can be removed.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r-- | net/ipv4/arp.c | 3 | ||||
-rw-r--r-- | net/ipv4/devinet.c | 3 | ||||
-rw-r--r-- | net/ipv4/fib_frontend.c | 3 | ||||
-rw-r--r-- | net/ipv4/ipmr.c | 7 | ||||
-rw-r--r-- | net/ipv4/netfilter/ip_queue.c | 3 | ||||
-rw-r--r-- | net/ipv4/netfilter/ipt_MASQUERADE.c | 3 |
6 files changed, 21 insertions, 1 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index bde1297..a11e7a5 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -1205,6 +1205,9 @@ static int arp_netdev_event(struct notifier_block *this, unsigned long event, vo { struct net_device *dev = ptr; + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&arp_tbl, dev); diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 5dbe580..c5eb1a29 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1051,6 +1051,9 @@ static int inetdev_event(struct notifier_block *this, unsigned long event, struct net_device *dev = ptr; struct in_device *in_dev = __in_dev_get_rtnl(dev); + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + ASSERT_RTNL(); if (!in_dev) { diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index eff6bce..cefb55e 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -860,6 +860,9 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo struct net_device *dev = ptr; struct in_device *in_dev = __in_dev_get_rtnl(dev); + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + if (event == NETDEV_UNREGISTER) { fib_disable_ip(dev, 2); return NOTIFY_DONE; diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 35683e1..0365988 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1083,13 +1083,18 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) { + struct net_device *dev = ptr; struct vif_device *v; int ct; + + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + if (event != NETDEV_UNREGISTER) return NOTIFY_DONE; v=&vif_table[0]; for (ct=0;ct<maxvif;ct++,v++) { - if (v->dev==ptr) + if (v->dev==dev) vif_delete(ct); } return NOTIFY_DONE; diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c index cb5e61a..d918560 100644 --- a/net/ipv4/netfilter/ip_queue.c +++ b/net/ipv4/netfilter/ip_queue.c @@ -557,6 +557,9 @@ ipq_rcv_dev_event(struct notifier_block *this, { struct net_device *dev = ptr; + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + /* Drop any packets associated with the downed device */ if (event == NETDEV_DOWN) ipq_dev_drop(dev->ifindex); diff --git a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c index 7c4e4be..3e0b562 100644 --- a/net/ipv4/netfilter/ipt_MASQUERADE.c +++ b/net/ipv4/netfilter/ipt_MASQUERADE.c @@ -125,6 +125,9 @@ static int masq_device_event(struct notifier_block *this, { const struct net_device *dev = ptr; + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + if (event == NETDEV_DOWN) { /* Device was downed. Search entire table for conntracks which were associated with that device, |