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Eric Dumazet f77d602124 ipv6: do not clear pinet6 field 
We have seen multiple NULL dereferences in __inet6_lookup_established()

After analysis, I found that inet6_sk() could be NULL while the
check for sk_family == AF_INET6 was true.

Bug was added in linux-2.6.29 when RCU lookups were introduced in UDP
and TCP stacks.

Once an IPv6 socket, using SLAB_DESTROY_BY_RCU is inserted in a hash
table, we no longer can clear pinet6 field.

This patch extends logic used in commit fcbdf09d96
("net: fix nulls list corruptions in sk_prot_alloc")

TCP/UDP/UDPLite IPv6 protocols provide their own .clear_sk() method
to make sure we do not clear pinet6 field.

At socket clone phase, we do not really care, as cloning the parent (non
NULL) pinet6 is not adding a fatal race.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2013-05-11 16:26:38 -07:00
..
9p 9p: turn fid->dlist into hlist 2013-02-27 22:51:08 -05:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
caif caif: Remove my bouncing email address. 2013-04-23 13:25:51 -04:00
irda irda: small read past the end of array in debug code 2013-04-19 17:32:31 -04:00
iucv af_iucv: fix recvmsg by replacing skb_pull() function 2013-04-08 17:16:57 -04:00
netfilter netfilter: move skb_gso_segment into nfnetlink_queue module 2013-04-29 20:09:05 +02:00
netns netfilter: nf_log: prepare net namespace support for loggers 2013-04-05 20:12:54 +02:00
nfc NFC: RFKILL support 2013-04-12 16:54:45 +02:00
phonet net: remove my future former mail address 2012-06-17 16:29:38 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
tc_act
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act_api.h act_police: move struct tcf_police to act_police.c 2013-02-12 18:59:45 -05:00
addrconf.h ipv6: statically link register_inet6addr_notifier() 2013-04-14 15:24:17 -04:00
af_ieee802154.h
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af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h af_unix: fix a fatal race with bit fields 2013-05-01 15:13:49 -04:00
ah.h
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arp.h net: Dont use ifindices in hash fns 2012-08-09 16:18:06 -07:00
atmclip.h atm: clip: Use device neigh support on top of "arp_tbl". 2011-11-30 18:51:03 -05:00
ax25.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ax88796.h
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cfg80211-wext.h cfg80211: remove unused wext handler exports 2011-08-08 14:26:29 -04:00
cfg80211.h cfg80211: introduce critical protocol indication from user-space 2013-04-22 15:48:00 +02:00
checksum.h net: core: add function for incremental IPv6 pseudo header checksum updates 2012-08-30 03:00:16 +02:00
cipso_ipv4.h cipso: handle CIPSO options correctly when NetLabel is disabled 2012-06-01 14:18:29 -04:00
cls_cgroup.h cls_cgroup: remove task_struct parameter from sock_update_classid() 2013-04-09 13:19:35 -04:00
codel.h codel: refine one condition to avoid a nul rec_inv_sqrt 2012-08-10 16:52:54 -07:00
compat.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
datalink.h
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dcbevent.h dcb: Add stub routines for !CONFIG_DCB 2011-10-06 15:49:51 -04:00
dcbnl.h net/dcb: Add an optional max rate attribute 2012-04-05 05:08:04 -04:00
dn.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_dev.h
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dn_fib.h decnet: Parse netlink attributes on our own 2013-03-22 10:31:16 -04:00
dn_neigh.h
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dn_nsp.h
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dn_route.h decnet: use correct RCU API to deref sk_dst_cache field 2013-01-28 00:15:27 -05:00
dsa.h dsa: Include linux/if_ether.h to fix build error 2011-12-01 11:41:06 -05:00
dsfield.h ipv6: Optimize ipv6_change_dsfield(). 2013-01-09 23:59:53 -08:00
dst.h Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug 2013-03-15 09:06:58 -04:00
dst_ops.h net: Fix warnings in dst_ops.h 2012-07-19 10:43:03 -07:00
esp.h
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ethoc.h
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fib_rules.h ipv4: Elide fib_validate_source() completely when possible. 2012-06-29 01:36:36 -07:00
firewire.h firewire net, ipv4 arp: Extend hardware address and remove driver-level packet inspection. 2013-03-26 12:32:13 -04:00
flow.h ipv4: Add FLOWI_FLAG_KNOWN_NH 2012-10-08 17:42:36 -04:00
flow_keys.h flow_keys: include thoff into flow_keys for later usage 2013-03-20 12:14:36 -04:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h Fix common misspellings 2011-03-31 11:26:23 -03:00
genetlink.h genl: Allow concurrent genl callbacks. 2013-04-25 01:43:15 -04:00
gre.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
gro_cells.h gro: Fix kcalloc argument order 2013-01-27 22:46:33 -05:00
icmp.h ipv4: fix error handling in icmp_protocol. 2013-02-22 15:10:18 -05:00
ieee80211_radiotap.h mac80211: support (partial) VHT radiotap information 2012-11-27 11:56:18 +01:00
ieee802154.h 6LoWPAN: add fragmentation support 2011-11-14 00:19:42 -05:00
ieee802154_netdev.h ieee802154/nl-mac.c: make some MLME operations optional 2013-04-08 12:00:16 -04:00
if_inet6.h net: ipv6: only invalidate previously tokenized addresses 2013-04-09 13:12:23 -04:00
inet6_connection_sock.h ipv6: Add helper inet6_csk_update_pmtu(). 2012-07-16 03:44:56 -07:00
inet6_hashtables.h ipv6: use a stronger hash for tcp 2013-02-21 18:15:58 -05:00
inet_common.h net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN) 2012-07-19 11:02:03 -07:00
inet_connection_sock.h tcp: Tail loss probe (TLP) 2013-03-12 08:30:34 -04:00
inet_ecn.h tunnel: drop packet if ECN present with not-ECT 2012-09-27 18:12:37 -04:00
inet_frag.h net: frag, fix race conditions in LRU list maintenance 2013-05-06 11:06:51 -04:00
inet_hashtables.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inet_sock.h ipv6: use a stronger hash for tcp 2013-02-21 18:15:58 -05:00
inet_timewait_sock.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inetpeer.h ipv4: Maintain redirect and PMTU info in struct rtable again. 2012-07-10 22:40:14 -07:00
ip.h ipv4: Add a socket release callback for datagram sockets 2013-01-21 14:17:05 -05:00
ip6_checksum.h ipv6: move csum_ipv6_magic() and udp6_csum_init() into static library 2013-01-08 17:56:10 -08:00
ip6_fib.h ipv6: fix race condition regarding dst->expires and dst->from. 2013-02-20 15:11:45 -05:00
ip6_route.h ipv6: Remove unused neigh argument for icmp6_dst_alloc() and its callers. 2013-01-18 14:41:13 -05:00
ip6_tunnel.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
ip_fib.h ipv4: fix definition of FIB_TABLE_HASHSZ 2013-03-13 10:47:09 -04:00
ip_tunnels.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
ip_vs.h ipvs: fix sparse warnings for some parameters 2013-04-23 11:43:05 +09:00
ipcomp.h
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ipconfig.h
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ipv6.h ipv6: implement RFC3168 5.3 (ecn protection) for ipv6 fragmentation handling 2013-03-24 17:16:30 -04:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lapb.h lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
lib80211.h hostap: Don't use create_proc_read_entry() 2013-04-29 15:41:56 -04:00
llc.h llc: Remove stray reference to sysctl_llc_station_ack_timeout. 2012-09-17 13:13:24 -04:00
llc_c_ac.h
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llc_c_ev.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
llc_c_st.h
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llc_conn.h
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llc_if.h
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llc_pdu.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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mac80211.h mac80211: improve the rate control API 2013-04-22 16:16:41 +02:00
mac802154.h mac802154: add wpan device-class support 2012-06-26 21:06:11 -07:00
mip6.h
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mld.h
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mrp.h net/802: Implement Multiple Registration Protocol (MRP) 2013-02-10 20:37:22 -05:00
ndisc.h ndisc: Move ndisc_opt_addr_space() to include/net/ndisc.h. 2013-01-21 13:33:14 -05:00
neighbour.h net neighbour, decnet: Ensure to align device private data on preferred alignment. 2013-02-11 00:21:44 -05:00
net_namespace.h netfilter: make /proc/net/netfilter pernet 2013-04-05 19:35:02 +02:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
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netevent.h ipv6 netevent: Remove old_neigh from netevent_redirect. 2013-01-14 15:04:59 -05:00
netlabel.h userns: Convert the audit loginuid to be a kuid 2012-09-17 18:08:54 -07:00
netlink.h netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
netprio_cgroup.h netprio_cgroup: remove task_struct parameter from sock_update_netprio() 2013-04-09 13:19:37 -04:00
netrom.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
nexthop.h
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nl802154.h
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p8022.h
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ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
pkt_sched.h sch_api: introduce qdisc_watchdog_schedule_ns() 2013-02-12 18:59:45 -05:00
protocol.h net: Remove code duplication between offload structures 2012-11-15 17:39:51 -05:00
psnap.h
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raw.h
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rawv6.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
red.h net_sched: red: Make minor corrections to comments 2012-04-16 23:53:11 -04:00
regulatory.h regulatory: use RCU to protect last_request 2013-01-03 13:01:30 +01:00
request_sock.h net: remove a stale comment for dl_next 2013-04-22 15:55:48 -04:00
rose.h rose: Add length checks to CALL_REQUEST parsing 2011-03-27 17:59:04 -07:00
route.h ipv4: avoid a test in ip_rt_put() 2012-11-03 14:59:04 -04:00
rtnetlink.h rtnetlink: Remove passing of attributes into rtnl_doit functions 2013-03-22 10:31:16 -04:00
sch_generic.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
scm.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-04-22 20:32:51 -04:00
secure_seq.h net: defer net_secret[] initialization 2013-04-29 15:14:02 -04:00
slhc_vj.h
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snmp.h net: avoid reloads in SNMP_UPD_PO_STATS 2012-08-06 13:40:47 -07:00
sock.h ipv6: do not clear pinet6 field 2013-05-11 16:26:38 -07:00
stp.h
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tcp.h tcp: GSO should be TSQ friendly 2013-04-12 18:17:06 -04:00
tcp_memcontrol.h cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg 2012-04-10 10:04:07 -07:00
tcp_states.h
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timewait_sock.h [PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary. 2012-06-09 14:56:12 -07:00
transp_v6.h ipv6: rename datagram_send_ctl and datagram_recv_ctl 2013-01-31 13:53:08 -05:00
udp.h net/ipv6/udp: UDP encapsulation: introduce encap_rcv hook into IPv6 2012-04-28 22:21:51 -04:00
udplite.h net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
wext.h
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wimax.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wpan-phy.h mac802154: monitor device support 2012-05-16 15:17:08 -04:00
x25.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
x25device.h
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xfrm.h xfrm: allow to avoid copying DSCP during encapsulation 2013-03-06 07:02:45 +01:00