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86e48c03d774e01ccd71ecba4fc4b5c2bc0b5b41
linux/include/net
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Eric Dumazet 86e48c03d7 ipv4: fix dst race in sk_dst_get() 
[ Upstream commit f886497212 ]

When IP route cache had been removed in linux-3.6, we broke assumption
that dst entries were all freed after rcu grace period. DST_NOCACHE
dst were supposed to be freed from dst_release(). But it appears
we want to keep such dst around, either in UDP sockets or tunnels.

In sk_dst_get() we need to make sure dst refcount is not 0
before incrementing it, or else we might end up freeing a dst
twice.

DST_NOCACHE set on a dst does not mean this dst can not be attached
to a socket or a tunnel.

Then, before actual freeing, we need to observe a rcu grace period
to make sure all other cpus can catch the fact the dst is no longer
usable.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dormando <dormando@rydia.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-28 08:00:04 -07:00
..
9p
9p: turn fid->dlist into hlist
2013-02-27 22:51:08 -05:00
bluetooth
Bluetooth: Introduce a new HCI_RFKILLED flag
2013-10-13 16:08:32 -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: nf_conntrack: reserve two bytes for nf_ct_ext->len
2014-05-30 21:52:11 -07:00
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
net: sctp: cache auth_enable per endpoint
2014-05-30 21:52:15 -07:00
tc_act
…
act_api.h
act_police: move struct tcf_police to act_police.c
2013-02-12 18:59:45 -05:00
addrconf.h
IPv6 NAT: Do not drop DNATed 6to4/6rd packets
2013-10-13 16:08:30 -07:00
af_ieee802154.h
…
af_rxrpc.h
…
af_unix.h
af_unix: fix a fatal race with bit fields
2013-05-01 15:13:49 -04:00
ah.h
…
arp.h
net: Dont use ifindices in hash fns
2012-08-09 16:18:06 -07:00
atmclip.h
…
ax25.h
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
ax88796.h
…
cfg80211-wext.h
…
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
net: fix cipso packet validation when !NETLABEL
2013-11-04 04:31:04 -08:00
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
…
dcbevent.h
…
dcbnl.h
net/dcb: Add an optional max rate attribute
2012-04-05 05:08:04 -04:00
dn_dev.h
…
dn_fib.h
decnet: Parse netlink attributes on our own
2013-03-22 10:31:16 -04:00
dn_neigh.h
…
dn_nsp.h
…
dn_route.h
decnet: use correct RCU API to deref sk_dst_cache field
2013-01-28 00:15:27 -05:00
dn.h
net: cleanup unsigned to unsigned int
2012-04-15 12:44:40 -04:00
dsa.h
…
dsfield.h
ipv6: Optimize ipv6_change_dsfield().
2013-01-09 23:59:53 -08:00
dst_ops.h
net: Fix warnings in dst_ops.h
2012-07-19 10:43:03 -07:00
dst.h
net: dst: provide accessor function to dst->xfrm
2013-11-04 04:31:03 -08:00
esp.h
…
ethoc.h
…
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_keys.h
flow_keys: include thoff into flow_keys for later usage
2013-03-20 12:14:36 -04:00
flow.h
ipv4: Add FLOWI_FLAG_KNOWN_NH
2012-10-08 17:42:36 -04:00
garp.h
…
gen_stats.h
…
genetlink.h
genl: Hold reference on correct module while netlink-dump.
2013-09-14 06:54:55 -07:00
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_netdev.h
ieee802154/nl-mac.c: make some MLME operations optional
2013-04-08 12:00:16 -04:00
ieee802154.h
…
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
net: fix inet_getid() and ipv6_select_ident() bugs
2014-06-26 15:12:38 -04:00
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: reset dst.expires value when clearing expire flag
2013-11-20 12:27:46 -08:00
ip6_route.h
ipv6: Limit mtu to 65575 bytes
2014-05-30 21:52:14 -07:00
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
ip_gre: Fix WCCPv2 header parsing.
2013-11-20 12:27:46 -08:00
ip_vs.h
netfilter: push reasm skb through instead of original frag skbs
2013-12-08 07:29:25 -08:00
ip.h
inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions
2013-12-08 07:29:25 -08:00
ipcomp.h
…
ipconfig.h
…
ipv6.h
inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions
2013-12-08 07:29:25 -08:00
ipx.h
…
iw_handler.h
…
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_c_ac.h
…
llc_c_ev.h
net: cleanup unsigned to unsigned int
2012-04-15 12:44:40 -04:00
llc_c_st.h
…
llc_conn.h
…
llc_if.h
…
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
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: Remove stray reference to sysctl_llc_station_ack_timeout.
2012-09-17 13:13:24 -04:00
mac80211.h
mac80211: add a flag to indicate CCK support for HT clients
2013-09-07 22:09:59 -07:00
mac802154.h
mac802154: add wpan device-class support
2012-06-26 21:06:11 -07:00
mip6.h
…
mld.h
…
mrp.h
net/802: Implement Multiple Registration Protocol (MRP)
2013-02-10 20:37:22 -05:00
ndisc.h
ndisc: Add missing inline to ndisc_addr_option_pad
2013-08-11 18:35:26 -07:00
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
…
netdma.h
…
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
…
nl802154.h
…
p8022.h
…
ping.h
…
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
…
raw.h
…
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
…
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
net_sched: restore "linklayer atm" handling
2013-09-14 06:54:55 -07:00
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: net_secret should not depend on TCP
2013-10-13 16:08:30 -07:00
slhc_vj.h
…
snmp.h
net: avoid reloads in SNMP_UPD_PO_STATS
2012-08-06 13:40:47 -07:00
sock.h
ipv4: fix dst race in sk_dst_get()
2014-07-28 08:00:04 -07:00
stp.h
…
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
…
tcp.h
net-tcp: fastopen: fix high order allocations
2014-03-23 21:38:10 -07:00
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
ipv6: call udp_push_pending_frames when uncorking a socket with AF_INET pending data
2013-07-28 16:29:49 -07:00
udplite.h
net: ipv4: Standardize prefixes for message logging
2012-03-12 17:05:21 -07:00
wext.h
…
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
…
xfrm.h
xfrm: force a garbage collection after deleting a policy
2013-05-31 17:30:07 -07:00