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Eric Dumazet 96631ed16c udp: introduce sk_for_each_rcu_safenext() 
Corey Minyard found a race added in commit 271b72c7fa
(udp: RCU handling for Unicast packets.)

 "If the socket is moved from one list to another list in-between the
 time the hash is calculated and the next field is accessed, and the
 socket has moved to the end of the new list, the traversal will not
 complete properly on the list it should have, since the socket will
 be on the end of the new list and there's not a way to tell it's on a
 new list and restart the list traversal.  I think that this can be
 solved by pre-fetching the "next" field (with proper barriers) before
 checking the hash."

This patch corrects this problem, introducing a new
sk_for_each_rcu_safenext() macro.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2008-10-29 11:19:58 -07:00
..
9p 9p: fix sparse warnings 2008-10-22 18:54:47 -05:00
bluetooth include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
irda include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
iucv [AF_IUCV]: postpone receival of iucv-packets 2007-10-10 16:54:51 -07:00
netfilter net: replace uses of NIP6_FMT with %p6 2008-10-28 23:02:31 -07:00
netns net: implement emergency route cache rebulds when gc_elasticity is exceeded 2008-10-27 17:06:14 -07:00
phonet Phonet: include generic link-layer header size in MAX_PHONET_HEADER 2008-10-26 23:06:31 -07:00
sctp net: replace uses of NIP6_FMT with %p6 2008-10-28 23:02:31 -07:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc tipc: Remove unneeded parameter to tipc_createport_raw() 2008-07-14 22:42:19 -07:00
act_api.h [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get 2008-01-28 15:11:17 -08:00
addrconf.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
af_rxrpc.h [AF_RXRPC]: Add an interface to the AF_RXRPC module for the AFS filesystem to use 2007-04-26 15:50:17 -07:00
af_unix.h [PATCH] f_count may wrap around 2008-07-26 20:53:40 -04:00
ah.h [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr 2007-10-10 16:55:55 -07:00
arp.h [NETFILTER]: ebtables: remove casts, use consts 2008-01-31 19:27:33 -08:00
atmclip.h
…
ax25.h [AX25] ax25_ds_timer: use mod_timer instead of add_timer 2008-02-12 17:53:34 -08:00
ax88796.h ax88796: add 93cx6 eeprom support 2007-10-10 16:53:56 -07:00
cfg80211.h cfg80211: show interface type 2008-09-24 16:18:00 -04:00
checksum.h [NET]: Move netfilter checksum helpers to net/core/utils.c 2008-01-28 14:55:14 -08:00
cipso_ipv4.h cipso: Add support for native local labeling and fixup mapping names 2008-10-10 10:16:34 -04:00
compat.h net: Use standard structures for generic socket address structures. 2008-07-19 22:35:47 -07:00
datalink.h
…
dn.h [DECNET]: Another unnecessary net/tcp.h inclusion in net/dn.h 2007-07-10 23:02:12 -07:00
dn_dev.h
…
dn_fib.h
…
dn_neigh.h
…
dn_nsp.h
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dn_route.h [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h [NET]: Constify include/net/dsfield.h 2008-01-28 14:55:58 -08:00
dst.h net: reduce structures when XFRM=n 2008-10-28 13:24:06 -07:00
esp.h [IPSEC]: Use crypto_aead and authenc in ESP 2008-01-31 19:27:02 -08:00
fib_rules.h net: add fib_rules_ops to flush_cache method 2008-07-05 19:01:28 -07:00
flow.h ipv4: Loosen source address check on IPv4 output 2008-10-01 07:28:28 -07:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h [NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API 2008-01-28 15:11:10 -08:00
genetlink.h netlink: Improve returned error codes 2008-06-03 16:36:54 -07:00
icmp.h mib: put icmpmsg statistics on struct net 2008-07-18 04:04:22 -07:00
ieee80211.h include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
ieee80211_crypt.h [PATCH] Update my email address from jkmaline@cc.hut.fi to j@w1.fi 2007-04-28 11:01:01 -04:00
ieee80211_radiotap.h include: use get/put_unaligned_* helpers 2008-07-25 10:53:26 -07:00
if_inet6.h ipv6: make struct ipv6_devconf static 2008-07-22 14:21:58 -07:00
inet6_connection_sock.h
…
inet6_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_common.h [NETNS]: Inet control socket should not hold a namespace. 2008-04-03 14:28:30 -07:00
inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h [IPV6]: Use appropriate sock tclass setting for routing lookup. 2008-04-13 23:40:51 -07:00
inet_frag.h [NET]: Rename inet_frag.h identifiers COMPLETE, FIRST_IN, LAST_IN to INET_FRAG_* 2008-03-28 16:35:27 -07:00
inet_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_sock.h tcp: Port redirection support for TCP 2008-10-01 07:46:49 -07:00
inet_timewait_sock.h ipv4: Implement IP_TRANSPARENT socket option 2008-10-01 07:30:02 -07:00
inetpeer.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip.h sysctl: simplify ->strategy 2008-10-16 11:21:47 -07:00
ip6_checksum.h
…
ip6_fib.h [NETNS][IPV6] rt6_info - move rt6_info structure inside the namespace 2008-03-04 13:48:30 -08:00
ip6_route.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
ip6_tunnel.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip_fib.h [IPV4]: Fix compile error building without CONFIG_FS_PROC 2008-02-05 02:54:16 -08:00
ip_vs.h net: replace uses of NIP6_FMT with %p6 2008-10-28 23:02:31 -07:00
ipcomp.h ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
ipconfig.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ipip.h inet: Make tunnel RX/TX byte counters more consistent 2008-10-09 12:03:17 -07:00
ipv6.h ipv6: making ip and icmp statistics per/namespace 2008-10-08 11:16:45 -07:00
ipx.h
…
iw_handler.h wext: Emit event stream entries correctly when compat. 2008-06-16 18:50:49 -07:00
lapb.h
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llc.h [LLC]: station source mac address 2008-03-28 16:28:36 -07:00
llc_c_ac.h
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llc_c_ev.h
…
llc_c_st.h
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llc_conn.h [NET]: Make socket creation namespace safe. 2007-10-10 16:49:07 -07:00
llc_if.h [LLC]: Kill static inline llc_addrany 2008-02-29 11:46:17 -08:00
llc_pdu.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
mac80211.h mac80211: fixme for kernel-doc 2008-10-14 21:12:37 -04:00
mip6.h [IPV6] MIP6: Use our standard definitions for paddings. 2008-04-12 13:43:22 +09:00
ndisc.h sysctl: simplify ->strategy 2008-10-16 11:21:47 -07:00
neighbour.h core: add stat to track unresolved discards in neighbor cache 2008-07-16 20:50:49 -07:00
net_namespace.h netfilter: netns nf_conntrack: add netns boilerplate 2008-10-08 11:35:02 +02:00
netdma.h
…
netevent.h [NET]: Remove unnecessary inclusion of dst.h 2008-01-28 14:53:38 -08:00
netlabel.h netlabel: Add configuration support for local labeling 2008-10-10 10:16:34 -04:00
netlink.h netlink: constify struct nlattr * arg to parsing functions 2008-10-28 11:59:11 -07:00
netrom.h
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nexthop.h
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p8022.h
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pkt_cls.h [PKT_SCHED]: Pass real namespace in net scheduler classifiers. 2008-03-27 16:53:37 -07:00
pkt_sched.h pkt_sched: Remove the tx queue state check in qdisc_run() 2008-09-23 01:05:56 -07:00
protocol.h [NETNS]: Drop packets in the non-initial namespace on the per/protocol basis. 2008-03-24 15:33:00 -07:00
psnap.h
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raw.h [RAW]: Add raw_hashinfo member on struct proto. 2008-03-22 16:56:51 -07:00
rawv6.h [IPv6] RAW: Compact the API for the kernel 2008-01-28 14:54:29 -08:00
red.h
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request_sock.h tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
rose.h rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
route.h ipv4: Conditionally enable transparent flow flag when connecting 2008-10-01 07:35:39 -07:00
rtnetlink.h [RTNL]: Introduce the rtnl_kill_links helper. 2008-04-16 00:46:52 -07:00
sch_generic.h pkt_sched: Fix handling of gso skbs on requeuing 2008-10-06 09:54:39 -07:00
scm.h pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
slhc_vj.h
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snmp.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
sock.h udp: introduce sk_for_each_rcu_safenext() 2008-10-29 11:19:58 -07:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
syncppp.h Remove bogus variables from syncppp.[ch] 2008-07-23 23:00:31 +02:00
tcp.h net: wrap sk->sk_backlog_rcv() 2008-10-07 14:18:42 -07:00
tcp_states.h
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timewait_sock.h
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transp_v6.h net: change proto destroy method to return void 2008-06-14 17:04:49 -07:00
udp.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: Dispatch and handle compat ioctls entirely in net/wireless/wext.c 2008-06-16 18:32:46 -07:00
wireless.h cfg80211: show interface type 2008-09-24 16:18:00 -04:00
x25.h
…
x25device.h
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xfrm.h net: reduce structures when XFRM=n 2008-10-28 13:24:06 -07:00