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1f770c0a09
linux/net
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Herbert Xu 1f770c0a09 netlink: Fix autobind race condition that leads to zero port ID 
The commit c0bb07df7d ("netlink:
Reset portid after netlink_insert failure") introduced a race
condition where if two threads try to autobind the same socket
one of them may end up with a zero port ID.  This led to kernel
deadlocks that were observed by multiple people.

This patch reverts that commit and instead fixes it by introducing
a separte rhash_portid variable so that the real portid is only set
after the socket has been successfully hashed.

Fixes: c0bb07df7d ("netlink: Reset portid after netlink_insert failure")
Reported-by: Tejun Heo <tj@kernel.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-20 22:55:31 -07:00
..
6lowpan 6lowpan: move module_init into core functionality 2015-08-11 22:05:36 +02:00
9p net/9p: Remove ib_get_dma_mr calls 2015-08-30 18:12:36 -04:00
802
8021q net: 8021q: convert to using IFF_NO_QUEUE 2015-08-18 11:55:06 -07:00
appletalk
atm atm: deal with setting entry before mkip was called 2015-09-17 22:13:32 -07:00
ax25 NET: AX.25: Stop heartbeat timer on disconnect. 2015-07-15 15:59:58 -07:00
batman-adv batman-adv: turn batadv_neigh_node_get() into local function 2015-08-27 20:15:34 +02:00
bluetooth Bluetooth: Delay check for conn->smp in smp_conn_security() 2015-09-17 12:28:27 +02:00
bridge bridge: fix igmpv3 / mldv2 report parsing 2015-09-11 15:08:20 -07:00
caif net: caif: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
can can: replace timestamp as unique skb attribute 2015-07-12 21:13:22 +02:00
ceph fs: create and use seq_show_option for escaping 2015-09-04 16:54:41 -07:00
core net: core: drop null test before destroy functions 2015-09-15 16:49:43 -07:00
dcb
dccp dccp: drop null test before destroy functions 2015-09-15 16:49:43 -07:00
decnet net: ipv6: use common fib_default_rule_pref 2015-09-09 14:19:50 -07:00
dns_resolver
dsa net: dsa: Allow DSA and CPU ports to have a phy-mode property 2015-08-31 14:48:02 -07:00
ethernet flow_dissector: Add flags argument to skb_flow_dissector functions 2015-09-01 15:06:22 -07:00
hsr net: hsr: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
ieee802154 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2015-08-29 13:15:03 -07:00
ipv4 iptunnel: make rx/tx bytes counters consistent 2015-09-20 22:36:22 -07:00
ipv6 net: Fix behaviour of unreachable, blackhole and prohibit routes 2015-09-20 21:45:08 -07:00
ipx
irda
iucv
key net: Fix RCU splat in af_key 2015-08-24 14:48:10 -07:00
l2tp
lapb
llc tcp: fix recv with flags MSG_WAITALL | MSG_PEEK 2015-07-27 01:06:53 -07:00
mac80211 mac80211: reject software RSSI CQM with beacon filtering 2015-09-04 15:23:22 +02:00
mac802154 ieee802154: add ack request default handling 2015-08-10 20:43:06 +02:00
mpls mpls: fix mpls_net_init memory leak 2015-08-31 12:45:09 -07:00
netfilter netfilter: nf_log: wait for rcu grace after logger unregistration 2015-09-17 13:37:31 +02:00
netlabel
netlink netlink: Fix autobind race condition that leads to zero port ID 2015-09-20 22:55:31 -07:00
netrom netfilter: Remove spurios included of netfilter.h 2015-06-18 21:14:32 +02:00
nfc nfc: netlink: Add capability to reply to vendor_cmd with data 2015-08-20 22:00:11 +02:00
openvswitch openvswitch: Fix IPv6 exthdr handling with ct helpers. 2015-09-17 15:31:49 -07:00
packet packet: add extended BPF fanout mode 2015-08-17 14:22:48 -07:00
phonet
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-09-10 13:53:15 -07:00
rfkill rfkill: Copy "all" global state to other types 2015-09-04 14:26:56 +02:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-06-24 02:58:51 -07:00
rxrpc
sched flow_dissector: Add flags argument to skb_flow_dissector functions 2015-09-01 15:06:22 -07:00
sctp sctp: fix race on protocol/netns initialization 2015-09-11 15:00:02 -07:00
sunrpc Changes for 4.3 2015-09-09 08:33:31 -07:00
switchdev switchdev: fix return value of switchdev_port_fdb_dump in case of error 2015-09-05 22:02:11 -07:00
tipc tipc: reinitialize pointer after skb linearize 2015-09-20 22:31:20 -07:00
unix
vmw_vsock
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless cfg80211: regulatory: restore proper user alpha2 2015-09-04 14:29:25 +02:00
x25
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-09-03 08:08:17 -07:00
compat.c
Kconfig lwtunnel: infrastructure for handling light weight tunnels like mpls 2015-07-21 10:39:03 -07:00
Makefile
socket.c
sysctl_net.c