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9ed498c6280a2f2b51d02df96df53037272ede49
linux/include/net
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Eric Dumazet 9ed498c628 net: silence data-races on sk_backlog.tail 
sk->sk_backlog.tail might be read without holding the socket spinlock,
we need to add proper READ_ONCE()/WRITE_ONCE() to silence the warnings.

KCSAN reported :

BUG: KCSAN: data-race in tcp_add_backlog / tcp_recvmsg

write to 0xffff8881265109f8 of 8 bytes by interrupt on cpu 1:
 __sk_add_backlog include/net/sock.h:907 [inline]
 sk_add_backlog include/net/sock.h:938 [inline]
 tcp_add_backlog+0x476/0xce0 net/ipv4/tcp_ipv4.c:1759
 tcp_v4_rcv+0x1a70/0x1bd0 net/ipv4/tcp_ipv4.c:1947
 ip_protocol_deliver_rcu+0x4d/0x420 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0x121/0x160 net/ipv4/ip_input.c:413
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip_rcv+0x18f/0x1a0 net/ipv4/ip_input.c:523
 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:4929
 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5043
 netif_receive_skb_internal+0x59/0x190 net/core/dev.c:5133
 napi_skb_finish net/core/dev.c:5596 [inline]
 napi_gro_receive+0x28f/0x330 net/core/dev.c:5629
 receive_buf+0x284/0x30b0 drivers/net/virtio_net.c:1061
 virtnet_receive drivers/net/virtio_net.c:1323 [inline]
 virtnet_poll+0x436/0x7d0 drivers/net/virtio_net.c:1428
 napi_poll net/core/dev.c:6311 [inline]
 net_rx_action+0x3ae/0xa90 net/core/dev.c:6379
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0xbb/0xe0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 do_IRQ+0xa6/0x180 arch/x86/kernel/irq.c:263
 ret_from_intr+0x0/0x19
 native_safe_halt+0xe/0x10 arch/x86/kernel/paravirt.c:71
 arch_cpu_idle+0x1f/0x30 arch/x86/kernel/process.c:571
 default_idle_call+0x1e/0x40 kernel/sched/idle.c:94
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1af/0x280 kernel/sched/idle.c:263
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355
 start_secondary+0x208/0x260 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

read to 0xffff8881265109f8 of 8 bytes by task 8057 on cpu 0:
 tcp_recvmsg+0x46e/0x1b40 net/ipv4/tcp.c:2050
 inet_recvmsg+0xbb/0x250 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:871 [inline]
 sock_recvmsg net/socket.c:889 [inline]
 sock_recvmsg+0x92/0xb0 net/socket.c:885
 sock_read_iter+0x15f/0x1e0 net/socket.c:967
 call_read_iter include/linux/fs.h:1889 [inline]
 new_sync_read+0x389/0x4f0 fs/read_write.c:414
 __vfs_read+0xb1/0xc0 fs/read_write.c:427
 vfs_read fs/read_write.c:461 [inline]
 vfs_read+0x143/0x2c0 fs/read_write.c:446
 ksys_read+0xd5/0x1b0 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read fs/read_write.c:595 [inline]
 __x64_sys_read+0x4c/0x60 fs/read_write.c:595
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8057 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-06 21:35:34 -08:00
..
9p
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188
2019-05-30 11:29:21 -07:00
bluetooth
Bluetooth: Add support for utilizing Fast Advertising Interval
2019-09-05 17:27:21 +02:00
caif
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
iucv
net/af_iucv: locate IUCV header via skb_network_header()
2018-09-26 09:56:07 -07:00
netfilter
netfilter: nf_tables: support for multiple devices per netdev hook
2019-10-23 13:01:34 +02:00
netns
net/tls: add skeleton of MIB statistics
2019-10-05 16:29:00 -07:00
nfc
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
phonet
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
2019-06-05 17:37:07 +02:00
sctp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-10-20 10:43:00 -07:00
tc_act
net: sched: take reference to psample group in flow_action infra
2019-09-16 09:18:03 +02:00
6lowpan.h
…
act_api.h
net: sched: update action implementations to support flags
2019-10-30 18:07:51 -07:00
addrconf.h
ipv6: Make ipv6_mc_may_pull() return bool.
2019-10-07 09:37:27 -04:00
af_ieee802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
af_rxrpc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
af_unix.h
net: split out functions related to registering inflight socket files
2019-02-28 08:24:23 -07:00
af_vsock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 321
2019-06-05 17:37:05 +02:00
ah.h
…
arp.h
net: avoid potential false sharing in neighbor related code
2019-11-06 16:14:48 -08:00
atmclip.h
…
ax25.h
ax25: fix possible use-after-free
2019-01-23 11:18:00 -08:00
ax88796.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
bond_3ad.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 90
2019-05-24 17:37:53 +02:00
bond_alb.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 5
2019-05-21 11:28:40 +02:00
bond_options.h
bonding: add an option to specify a delay between peer notifications
2019-07-04 12:30:48 -07:00
bonding.h
net: remove unnecessary variables and callback
2019-10-24 14:53:49 -07:00
bpf_sk_storage.h
bpf: support cloning sk storage on accept()
2019-08-17 23:18:54 +02:00
busy_poll.h
net: annotate lockless accesses to sk->sk_napi_id
2019-10-30 17:34:35 -07:00
calipso.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
cfg80211-wext.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
cfg80211.h
net: Fix various misspellings of "connect"
2019-10-28 13:41:59 -07:00
cfg802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
checksum.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cipso_ipv4.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
cls_cgroup.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
net: rework SIOCGSTAMP ioctl handling
2019-04-19 14:07:40 -07:00
datalink.h
…
dcbevent.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
dcbnl.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
devlink.h
devlink: propagate extack down to health reporter ops
2019-10-11 21:02:30 -07:00
dn_dev.h
…
dn_fib.h
…
dn_neigh.h
…
dn_nsp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn_route.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn.h
…
drop_monitor.h
drop_monitor: Add basic infrastructure for hardware drops
2019-08-17 12:40:08 -07:00
dsa.h
net: dsa: Add support for devlink resources
2019-11-05 18:09:45 -08:00
dsfield.h
…
dst_cache.h
…
dst_metadata.h
…
dst_ops.h
…
dst.h
net: dst.h: Fix shifting signed 32-bit value by 31 bits problem
2019-07-01 10:48:34 -07:00
erspan.h
…
esp.h
…
ethoc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
failover.h
net: Introduce generic failover module
2018-05-28 22:59:54 -04:00
fib_notifier.h
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_rules.h
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
firewire.h
…
flow_dissector.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-11-02 13:54:56 -07:00
flow_offload.h
net: sched: extend flow_action_entry with destructor
2019-09-16 09:18:02 +02:00
flow.h
route: Add multipath_hash in flowi_common to make user-define hash
2019-02-27 12:50:17 -08:00
fou.h
…
fq_impl.h
net/flow_dissector: switch to siphash
2019-10-23 20:13:22 -07:00
fq.h
net/flow_dissector: switch to siphash
2019-10-23 20:13:22 -07:00
garp.h
…
gen_stats.h
net_sched: extend packet counter to 64bit
2019-11-05 18:20:55 -08:00
genetlink.h
net: genetlink: remove unused genl_family_attrbuf()
2019-10-06 15:44:47 +02:00
geneve.h
net: Move the definition of the default Geneve udp port to public header file
2019-03-22 12:09:31 -07:00
gre.h
net: Add netif_is_gretap()/netif_is_ip6gretap()
2018-12-10 15:53:04 -08:00
gro_cells.h
…
gtp.h
…
gue.h
net:gue.h:Fix shifting signed 32-bit value by 31 bits problem
2019-07-01 10:58:23 -07:00
hwbm.h
net: hwbm: if CONFIG_NET_HWBM unset, make stub functions static
2019-10-25 16:24:32 -07:00
icmp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ieee80211_radiotap.h
Merge tag 'wireless-drivers-next-for-davem-2019-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
2019-02-22 12:56:24 -08:00
ieee802154_netdev.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
if_inet6.h
ipv6: shrink struct ipv6_mc_socklist
2019-08-28 14:43:03 -07:00
ife.h
net: ife: drop include of module.h from net/ife.h
2019-04-22 21:50:53 -07:00
ila.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_connection_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_hashtables.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet_common.h
inet: factor out inet_send_prepare()
2019-07-03 13:51:54 -07:00
inet_connection_sock.h
net/tls: use RCU protection on icsk->icsk_ulp_data
2019-08-31 23:44:28 -07:00
inet_ecn.h
inet: Refactor INET_ECN_decapsulate()
2018-10-17 17:45:07 -07:00
inet_frag.h
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
inet_hashtables.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet_sock.h
ip: support SO_MARK cmsg
2019-09-13 21:44:19 +02:00
inet_timewait_sock.h
tcp: honor SO_PRIORITY in TIME_WAIT state
2019-09-27 12:05:02 +02:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-08 21:50:15 -08:00
ip6_checksum.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ip6_fib.h
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
ip6_route.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-06-27 21:06:39 -07:00
ip6_tunnel.h
ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL
2019-06-18 20:48:45 -04:00
ip_fib.h
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
ip_tunnels.h
route: Add multipath_hash in flowi_common to make user-define hash
2019-02-27 12:50:17 -08:00
ip_vs.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-11-02 13:54:56 -07:00
ip.h
ipv4: fix IPSKB_FRAG_PMTU handling with fragmentation
2019-10-21 10:46:42 -07:00
ipcomp.h
…
ipconfig.h
…
ipv6_frag.h
inet: fix various use-after-free in defrags units
2019-06-19 11:37:47 -04:00
ipv6_stubs.h
ipv6: export function to send route updates
2019-05-22 17:48:43 -07:00
ipv6.h
tcp: add ipv6_addr_v4mapped_loopback() helper
2019-10-01 13:07:53 -07:00
ipx.h
…
iw_handler.h
…
kcm.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
l3mdev.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
lag.h
net: Add lag.h, net_lag_port_dev_txable()
2018-07-11 23:10:19 -07:00
lapb.h
…
lib80211.h
…
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
llc: fix sk_buff leak in llc_conn_service()
2019-10-08 13:23:05 -07:00
llc_if.h
…
llc_pdu.h
…
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: avoid blocking in llc_sap_close()
2018-09-13 09:04:58 -07:00
lwtunnel.h
lwtunnel: Pass encap and encap type attributes to lwtunnel_fill_encap
2019-04-23 19:42:29 -07:00
mac80211.h
mac80211: simplify TX aggregation start
2019-10-04 13:58:13 +02:00
mac802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
mip6.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
mld.h
…
mpls_iptunnel.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295
2019-06-05 17:36:38 +02:00
mpls.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295
2019-06-05 17:36:38 +02:00
mrp.h
…
ncsi.h
…
ndisc.h
net: avoid potential false sharing in neighbor related code
2019-11-06 16:14:48 -08:00
neighbour.h
net ipv6: Prevent neighbor add if protocol is disabled on device
2019-04-17 23:19:07 -07:00
net_failover.h
net: Introduce net_failover driver
2018-05-28 22:59:54 -04:00
net_namespace.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-11-02 13:54:56 -07:00
net_ratelimit.h
…
netevent.h
net: ipv4: Notify about changes to ip_forward_update_priority
2018-08-01 09:52:30 -07:00
netlabel.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
netlink.h
netlink: Fix nlmsg_parse as a wrapper for strict message parsing
2019-08-13 20:37:16 -07:00
netprio_cgroup.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-04-11 13:59:49 -07:00
nexthop.h
net: Properly update v4 routes with v6 nexthop
2019-09-05 12:35:58 +02:00
nl802154.h
…
nsh.h
…
p8022.h
…
page_pool.h
net: core: page_pool: add user refcnt and reintroduce page_pool_destroy
2019-07-08 14:58:04 -07:00
ping.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
pkt_cls.h
net: sched: take reference to action dev before calling offloads
2019-08-26 14:17:43 -07:00
pkt_sched.h
Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net
2019-09-17 23:51:10 +02:00
pptp.h
…
protocol.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
psample.h
net: sched: take reference to psample group in flow_action infra
2019-09-16 09:18:03 +02:00
psnap.h
…
raw.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rawv6.h
…
red.h
…
regulatory.h
cfg80211: make wmm_rule part of the reg_rule structure
2018-08-28 11:11:47 +02:00
request_sock.h
net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head
2019-10-09 21:34:31 -07:00
rose.h
…
route.h
ipv4: Revert removal of rt_uses_gateway
2019-09-20 18:23:33 -07:00
rsi_91x.h
…
rtnetlink.h
net: Add extack argument to rtnl_create_link
2018-11-06 15:00:45 -08:00
rtnh.h
net: Rename net/nexthop.h net/rtnh.h
2019-04-22 21:47:25 -07:00
sch_generic.h
net: sched: don't expose action qstats to skb_tc_reinsert()
2019-10-30 18:07:50 -07:00
scm.h
pids: Compute task_tgid using signal->leader_pid
2018-07-21 10:43:12 -05:00
secure_seq.h
…
seg6_hmac.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6_local.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
slhc_vj.h
…
smc.h
net/smc: no new connections on disappearing devices
2019-10-09 19:45:44 -07:00
snmp.h
net/tls: add skeleton of MIB statistics
2019-10-05 16:29:00 -07:00
sock_reuseport.h
udp: correct reuseport selection with connected sockets
2019-09-16 09:02:18 +02:00
sock.h
net: silence data-races on sk_backlog.tail
2019-11-06 21:35:34 -08:00
Space.h
…
stp.h
…
strparser.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
switchdev.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_states.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp.h
tcp: annotate sk->sk_rcvbuf lockless reads
2019-10-13 10:13:08 -07:00
timewait_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tipc.h
…
tls_toe.h
net/tls: rename tls_hw_* functions tls_toe_*
2019-10-04 14:07:07 -07:00
tls.h
net/tls: store decrypted on a single bit
2019-10-07 09:58:28 -04:00
transp_v6.h
ipv6: fold sockcm_cookie into ipcm6_cookie
2018-07-07 10:58:49 +09:00
tso.h
…
tun_proto.h
…
udp_tunnel.h
ipv6: Move ipv6 stubs to a separate header file
2019-03-29 10:53:45 -07:00
udp.h
udp: Remove unlikely() from IS_ERR*() condition
2019-08-30 19:49:37 -07:00
udplite.h
…
vsock_addr.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 321
2019-06-05 17:37:05 +02:00
vxlan.h
vxlan: add adjacent link to limit depth level
2019-10-24 14:53:49 -07:00
wext.h
…
wimax.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268
2019-06-05 17:30:29 +02:00
x25.h
…
x25device.h
…
xdp_priv.h
xdp: add tracepoints for XDP mem
2019-06-19 11:23:13 -04:00
xdp_sock.h
xsk: Restructure/inline XSKMAP lookup/redirect/flush
2019-11-02 00:38:49 +01:00
xdp.h
xdp: page_pool related fix to cpumap
2019-06-19 11:23:13 -04:00
xfrm.h
xfrm interface: fix management of phydev
2019-07-17 10:03:54 +02:00