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aha/net
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Eric Dumazet 941297f443 netfilter: nf_conntrack: nf_conntrack_alloc() fixes 
When a slab cache uses SLAB_DESTROY_BY_RCU, we must be careful when allocating
objects, since slab allocator could give a freed object still used by lockless
readers.

In particular, nf_conntrack RCU lookups rely on ct->tuplehash[xxx].hnnode.next
being always valid (ie containing a valid 'nulls' value, or a valid pointer to next
object in hash chain.)

kmem_cache_zalloc() setups object with NULL values, but a NULL value is not valid
for ct->tuplehash[xxx].hnnode.next.

Fix is to call kmem_cache_alloc() and do the zeroing ourself.

As spotted by Patrick, we also need to make sure lookup keys are committed to
memory before setting refcount to 1, or a lockless reader could get a reference
on the old version of the object. Its key re-check could then pass the barrier.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-07-16 14:03:40 +02:00
..
9p virtio: find_vqs/del_vqs virtio operations 2009-06-12 22:16:36 +09:30
802 net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
8021q 8021q: Vlan driver should use rcu_barrier() on unload instead of syncronize_net() 2009-06-10 01:11:22 -07:00
appletalk net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
atm atm: sk_wmem_alloc initial value is one 2009-06-18 00:29:12 -07:00
ax25 net: Move rx skb_orphan call to where needed 2009-06-23 16:36:25 -07:00
bluetooth net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
bridge bridge: Simplify interface for ATM LANE 2009-06-11 21:03:21 -07:00
can can: af_can.c use rcu_barrier() on module unload. 2009-06-10 01:11:24 -07:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-06-24 10:01:12 -07:00
dcb DCB: fix kfree(skb) 2009-01-04 17:29:21 -08:00
dccp ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
decnet net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
dsa net: convert unicast addr list 2009-05-29 22:12:32 -07:00
econet net: sk_wmem_alloc has initial value of one, not zero 2009-06-17 04:31:25 -07:00
ethernet net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
ieee802154 ieee802154: use standard routine for printing dumps 2009-06-19 00:18:43 -07:00
ipv4 netfilter: tcp conntrack: fix unacknowledged data detection with NAT 2009-06-29 14:07:56 +02:00
ipv6 ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
ipx net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
irda net: Move rx skb_orphan call to where needed 2009-06-23 16:36:25 -07:00
iucv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-06-22 11:57:09 -07:00
key net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
lapb
llc net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
mac80211 mac80211: fix wext bssid/ssid setting 2009-06-15 15:05:59 -04:00
netfilter netfilter: nf_conntrack: nf_conntrack_alloc() fixes 2009-07-16 14:03:40 +02:00
netlabel netlabel: Use genl_register_family_with_ops() 2009-05-21 16:50:24 -07:00
netlink net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
netrom net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
packet net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
phonet phonet: Use frag list abstraction interfaces. 2009-06-09 00:24:06 -07:00
rds Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-05-18 21:08:20 -07:00
rfkill rfkill: export persistent attribute in sysfs 2009-06-19 11:50:18 -04:00
rose net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
rxrpc RxRPC: Don't attempt to reuse aborted connections 2009-06-16 21:20:14 -07:00
sched net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
sctp ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
sunrpc Merge branch 'for-2.6.31' of git://fieldses.org/git/linux-nfsd 2009-06-22 12:55:50 -07:00
tipc tipc: Use genl_register_family_with_ops() 2009-05-21 16:50:23 -07:00
unix net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
wanrouter wanrouter: fix sparse warnings: context imbalance 2009-02-26 23:13:36 -08:00
wimax wimax: fix warning caused by not checking retval of rfkill_set_hw_state() 2009-06-11 11:12:48 -07:00
wireless cfg80211: validate station settings 2009-06-19 11:50:24 -04:00
x25 net: correct off-by-one write allocations reports 2009-06-18 00:29:12 -07:00
xfrm xfrm: Use frag list abstraction interfaces. 2009-06-09 00:24:07 -07:00
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
Kconfig net: add IEEE 802.15.4 socket family implementation 2009-06-09 05:25:32 -07:00
Makefile net: add IEEE 802.15.4 socket family implementation 2009-06-09 05:25:32 -07:00
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-06 18:05:43 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
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