linux/include/net/arp.h, branch v3.0.61

net: fix NULL dereferences in check_peer_redir()

2012-02-13T19:06:13Z

[ Upstream commit d3aaeb38c40e5a6c08dd31a1b64da65c4352be36, along with dependent backports of commits: 69cce1d1404968f78b177a0314f5822d5afdbbfb 9de79c127cccecb11ae6a21ab1499e87aa222880 218fa90f072e4aeff9003d57e390857f4f35513e 580da35a31f91a594f3090b7a2c39b85cb051a12 f7e57044eeb1841847c24aa06766c8290c202583 e049f28883126c689cf95859480d9ee4ab23b7fa ] Gergely Kalman reported crashes in check_peer_redir(). It appears commit f39925dbde778 (ipv4: Cache learned redirect information in inetpeer.) added a race, leading to possible NULL ptr dereference. Since we can now change dst neighbour, we should make sure a reader can safely use a neighbour. Add RCU protection to dst neighbour, and make sure check_peer_redir() can be called safely by different cpus in parallel. As neighbours are already freed after one RCU grace period, this patch should not add typical RCU penalty (cache cold effects) Many thanks to Gergely for providing a pretty report pointing to the bug. Reported-by: Gergely Kalman Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

arp: allow to invalidate specific ARP entries

2011-01-11T00:10:37Z

IPv4 over firewire needs to be able to remove ARP entries from the ARP cache that belong to nodes that are removed, because IPv4 over firewire uses ARP packets for private information about nodes. This information becomes invalid as soon as node drops off the bus and when it reconnects, its only possible to start talking to it after it responded to an ARP packet. But ARP cache prevents such packets from being sent. Signed-off-by: Maxim Levitsky Signed-off-by: David S. Miller

arp: remove unnecessary export of arp_broken_ops

2010-09-30T02:45:35Z

arp_broken_ops is only used in arp.c Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

net: make neigh_ops constant

2009-09-02T00:40:57Z

These tables are never modified at runtime. Move to read-only section. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

[NETFILTER]: ebtables: remove casts, use consts

2008-02-01T03:27:33Z

Signed-off-by: Jan Engelhardt Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller

[IPV4]: Remove unused define in include/net/arp.h (HAVE_ARP_CREATE)

2008-01-28T23:00:16Z

Signed-off-by: Rami Rosen Signed-off-by: David S. Miller

[IPV4]: Pass the net pointer to the arp_req_set_proxy()

2008-01-28T22:58:09Z

This one will need to set the IPV4_DEVCONF_ALL(PROXY_ARP), but there's no ways to get the net right in place, so we have to pull one from the inet_ioctl's struct sock. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller

[IPV6]: Assorted trivial endianness annotations.

2006-12-03T05:22:50Z

Signed-off-by: Al Viro Signed-off-by: David S. Miller

[IPV4] net/ipv4/arp.c: trivial annotations

2006-09-29T01:02:14Z

Signed-off-by: Al Viro Signed-off-by: David S. Miller

[IPV4]: Possible cleanups.

2006-04-14T22:00:20Z

This patch contains the following possible cleanups: - make the following needlessly global function static: - arp.c: arp_rcv() - remove the following unused EXPORT_SYMBOL's: - devinet.c: devinet_ioctl - fib_frontend.c: ip_rt_ioctl - inet_hashtables.c: inet_bind_bucket_create - inet_hashtables.c: inet_bind_hash - tcp_input.c: sysctl_tcp_abc - tcp_ipv4.c: sysctl_tcp_tw_reuse - tcp_output.c: sysctl_tcp_mtu_probing - tcp_output.c: sysctl_tcp_base_mss Signed-off-by: Adrian Bunk Signed-off-by: David S. Miller