BUG: sleeping function called from invalid context at net/core/sock.c:2772
audit: type=1400 audit(1519062349.607:17): avc:  denied  { prog_load } for  pid=5208 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
in_atomic(): 1, irqs_disabled(): 0, pid: 303, name: kworker/u4:3
5 locks held by kworker/u4:3/303:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<0000000047e94794>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<0000000046f4b0d3>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000007ad0d2a5>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000c9ecf03b>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<00000000a06478c4>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<00000000a06478c4>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 303 Comm: kworker/u4:3 Not tainted 4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2772
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
audit: type=1400 audit(1519062349.695:18): avc:  denied  { create } for  pid=5207 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
kauditd_printk_skb: 1 callbacks suppressed
audit: type=1400 audit(1519062350.116:20): avc:  denied  { create } for  pid=5275 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
netlink: 16 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor6'.
audit: type=1400 audit(1519062350.171:21): avc:  denied  { write } for  pid=5275 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
audit: type=1400 audit(1519062350.221:22): avc:  denied  { map } for  pid=5300 comm="syz-executor1" path="socket:[14445]" dev="sockfs" ino=14445 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=rawip_socket permissive=1
audit: type=1400 audit(1519062350.231:23): avc:  denied  { read } for  pid=5275 comm="syz-executor6" path="socket:[14060]" dev="sockfs" ino=14060 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
Cannot find add_set index 1029 as target
audit: type=1400 audit(1519062350.391:24): avc:  denied  { getopt } for  pid=5328 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
audit: type=1400 audit(1519062350.456:25): avc:  denied  { map_read map_write } for  pid=5345 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
Cannot find add_set index 1029 as target
audit: type=1400 audit(1519062350.515:26): avc:  denied  { getattr } for  pid=5354 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
netlink: 'syz-executor7': attribute type 1 has an invalid length.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
xt_nfacct: accounting object with name `syz0' does not exists
netlink: 'syz-executor7': attribute type 1 has an invalid length.
xt_nfacct: accounting object with name `syz0' does not exists
xt_connbytes: Forcing CT accounting to be enabled
Cannot find add_set index 0 as target
Cannot find add_set index 0 as target
sctp: [Deprecated]: syz-executor4 (pid 5448) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
sctp: [Deprecated]: syz-executor4 (pid 5452) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
audit: type=1400 audit(1519062351.266:27): avc:  denied  { map } for  pid=5458 comm="syz-executor2" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=14304 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'raw'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor3'.
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'raw'.
x_tables: ip_tables: icmp match: only valid for protocol 1
audit: type=1400 audit(1519062351.469:28): avc:  denied  { name_bind } for  pid=5527 comm="syz-executor5" src=20020 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1
x_tables: ip_tables: icmp match: only valid for protocol 1
audit: type=1400 audit(1519062351.469:29): avc:  denied  { node_bind } for  pid=5527 comm="syz-executor5" saddr=fe80::5aa src=20020 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1
netlink: 16 bytes leftover after parsing attributes in process `syz-executor3'.
RDS: rds_bind could not find a transport for 255.255.255.255, load rds_tcp or rds_rdma?

======================================================
WARNING: possible circular locking dependency detected
4.16.0-rc1+ #232 Tainted: G        W       
------------------------------------------------------
syz-executor5/5607 is trying to acquire lock:
 (&(&srv->idr_lock)->rlock){+...}, at: [<00000000e5a22486>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 (&(&srv->idr_lock)->rlock){+...}, at: [<00000000e5a22486>] tipc_conn_lookup+0x1f/0x90 net/tipc/topsrv.c:225

but task is already holding lock:
 (&(&sub->lock)->rlock){+...}, at: [<00000000c4eeedb9>] spin_lock include/linux/spinlock.h:310 [inline]
 (&(&sub->lock)->rlock){+...}, at: [<00000000c4eeedb9>] tipc_sub_report_overlap+0x3ce/0x4f0 net/tipc/subscr.c:97

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&(&sub->lock)->rlock){+...}:
       __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
       _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
       spin_lock include/linux/spinlock.h:310 [inline]
       tipc_sub_report_overlap+0x3ce/0x4f0 net/tipc/subscr.c:97
       tipc_nameseq_insert_publ net/tipc/name_table.c:329 [inline]
       tipc_nametbl_insert_publ+0xf1c/0x1850 net/tipc/name_table.c:489
       tipc_nametbl_publish+0x2aa/0x4f0 net/tipc/name_table.c:762
       tipc_sk_publish+0x1f5/0x4b0 net/tipc/socket.c:2600
       tipc_sk_join net/tipc/socket.c:2770 [inline]
       tipc_setsockopt+0x5fd/0xcf0 net/tipc/socket.c:2874
       SYSC_setsockopt net/socket.c:1850 [inline]
       SyS_setsockopt+0x189/0x360 net/socket.c:1829
       do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x26/0x9b

-> #3 (&(&nseq->lock)->rlock){+...}:
       __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
       _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168
       spin_lock_bh include/linux/spinlock.h:315 [inline]
       tipc_nametbl_insert_publ+0x2da/0x1850 net/tipc/name_table.c:488
       tipc_nametbl_publish+0x2aa/0x4f0 net/tipc/name_table.c:762
       tipc_sk_publish+0x1f5/0x4b0 net/tipc/socket.c:2600
sctp: failed to load transform for md5: -2
       tipc_bind+0x1a9/0x2d0 net/tipc/socket.c:647
       kernel_bind+0x62/0x80 net/socket.c:3128
       tipc_topsrv_create_listener net/tipc/topsrv.c:531 [inline]
       tipc_topsrv_start+0x9ab/0x1010 net/tipc/topsrv.c:671
       tipc_init_net+0x3cc/0x570 net/tipc/core.c:74
       ops_init+0xec/0x500 net/core/net_namespace.c:124
       __register_pernet_operations net/core/net_namespace.c:926 [inline]
       register_pernet_operations+0x45e/0xa00 net/core/net_namespace.c:1000
       register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1046
       tipc_init+0x83/0x104 net/tipc/core.c:136
       do_one_initcall+0xad/0x357 init/main.c:832
       do_initcall_level init/main.c:898 [inline]
       do_initcalls init/main.c:906 [inline]
       do_basic_setup init/main.c:924 [inline]
       kernel_init_freeable+0x469/0x521 init/main.c:1072
sctp: failed to load transform for md5: -2
       kernel_init+0x13/0x180 init/main.c:999
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429

-> #2 (&(&tn->nametbl_lock)->rlock){+...}:
       __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
       _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168
       spin_lock_bh include/linux/spinlock.h:315 [inline]
       tipc_nametbl_publish+0x1ff/0x4f0 net/tipc/name_table.c:754
       tipc_sk_publish+0x1f5/0x4b0 net/tipc/socket.c:2600
       tipc_bind+0x1a9/0x2d0 net/tipc/socket.c:647
       kernel_bind+0x62/0x80 net/socket.c:3128
       tipc_topsrv_create_listener net/tipc/topsrv.c:531 [inline]
       tipc_topsrv_start+0x9ab/0x1010 net/tipc/topsrv.c:671
       tipc_init_net+0x3cc/0x570 net/tipc/core.c:74
       ops_init+0xec/0x500 net/core/net_namespace.c:124
       __register_pernet_operations net/core/net_namespace.c:926 [inline]
       register_pernet_operations+0x45e/0xa00 net/core/net_namespace.c:1000
       register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1046
       tipc_init+0x83/0x104 net/tipc/core.c:136
       do_one_initcall+0xad/0x357 init/main.c:832
       do_initcall_level init/main.c:898 [inline]
       do_initcalls init/main.c:906 [inline]
       do_basic_setup init/main.c:924 [inline]
       kernel_init_freeable+0x469/0x521 init/main.c:1072
       kernel_init+0x13/0x180 init/main.c:999
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429

-> #1 (k-sk_lock-AF_TIPC){+.+.}:
       lock_sock_nested+0xc2/0x110 net/core/sock.c:2781
       lock_sock include/net/sock.h:1463 [inline]
       tipc_release+0x103/0xff0 net/tipc/socket.c:572
       sock_release+0x8d/0x1e0 net/socket.c:594
       tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
       tipc_exit_net+0x15/0x40 net/tipc/core.c:96
       ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
       cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
       process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
       worker_thread+0x223/0x1990 kernel/workqueue.c:2247
       kthread+0x33c/0x400 kernel/kthread.c:238
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429

-> #0 (&(&srv->idr_lock)->rlock){+...}:
       lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
       __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
       _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168
       spin_lock_bh include/linux/spinlock.h:315 [inline]
       tipc_conn_lookup+0x1f/0x90 net/tipc/topsrv.c:225
       tipc_topsrv_queue_evt+0x225/0x6d0 net/tipc/topsrv.c:326
       tipc_sub_send_event+0x250/0x440 net/tipc/subscr.c:54
       tipc_sub_report_overlap+0x3f6/0x4f0 net/tipc/subscr.c:98
       tipc_nameseq_insert_publ net/tipc/name_table.c:329 [inline]
       tipc_nametbl_insert_publ+0xf1c/0x1850 net/tipc/name_table.c:489
       tipc_nametbl_publish+0x2aa/0x4f0 net/tipc/name_table.c:762
       tipc_sk_publish+0x1f5/0x4b0 net/tipc/socket.c:2600
       tipc_sk_join net/tipc/socket.c:2770 [inline]
       tipc_setsockopt+0x5fd/0xcf0 net/tipc/socket.c:2874
       SYSC_setsockopt net/socket.c:1850 [inline]
       SyS_setsockopt+0x189/0x360 net/socket.c:1829
       do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x26/0x9b

other info that might help us debug this:

Chain exists of:
  &(&srv->idr_lock)->rlock --> &(&nseq->lock)->rlock --> &(&sub->lock)->rlock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&(&sub->lock)->rlock);
                               lock(&(&nseq->lock)->rlock);
                               lock(&(&sub->lock)->rlock);
  lock(&(&srv->idr_lock)->rlock);

 *** DEADLOCK ***

4 locks held by syz-executor5/5607:
 #0:  (sk_lock-AF_TIPC){+.+.}, at: [<0000000030a23809>] lock_sock include/net/sock.h:1463 [inline]
 #0:  (sk_lock-AF_TIPC){+.+.}, at: [<0000000030a23809>] tipc_setsockopt+0x13f/0xcf0 net/tipc/socket.c:2847
 #1:  (&(&tn->nametbl_lock)->rlock){+...}, at: [<000000003f475cf4>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #1:  (&(&tn->nametbl_lock)->rlock){+...}, at: [<000000003f475cf4>] tipc_nametbl_publish+0x1ff/0x4f0 net/tipc/name_table.c:754
 #2:  (&(&nseq->lock)->rlock){+...}, at: [<00000000aa67b54d>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #2:  (&(&nseq->lock)->rlock){+...}, at: [<00000000aa67b54d>] tipc_nametbl_insert_publ+0x2da/0x1850 net/tipc/name_table.c:488
 #3:  (&(&sub->lock)->rlock){+...}, at: [<00000000c4eeedb9>] spin_lock include/linux/spinlock.h:310 [inline]
 #3:  (&(&sub->lock)->rlock){+...}, at: [<00000000c4eeedb9>] tipc_sub_report_overlap+0x3ce/0x4f0 net/tipc/subscr.c:97

stack backtrace:
CPU: 1 PID: 5607 Comm: syz-executor5 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223
 check_prev_add kernel/locking/lockdep.c:1863 [inline]
 check_prevs_add kernel/locking/lockdep.c:1976 [inline]
 validate_chain kernel/locking/lockdep.c:2417 [inline]
 __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431
 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168
 spin_lock_bh include/linux/spinlock.h:315 [inline]
 tipc_conn_lookup+0x1f/0x90 net/tipc/topsrv.c:225
 tipc_topsrv_queue_evt+0x225/0x6d0 net/tipc/topsrv.c:326
 tipc_sub_send_event+0x250/0x440 net/tipc/subscr.c:54
 tipc_sub_report_overlap+0x3f6/0x4f0 net/tipc/subscr.c:98
 tipc_nameseq_insert_publ net/tipc/name_table.c:329 [inline]
 tipc_nametbl_insert_publ+0xf1c/0x1850 net/tipc/name_table.c:489
 tipc_nametbl_publish+0x2aa/0x4f0 net/tipc/name_table.c:762
 tipc_sk_publish+0x1f5/0x4b0 net/tipc/socket.c:2600
 tipc_sk_join net/tipc/socket.c:2770 [inline]
 tipc_setsockopt+0x5fd/0xcf0 net/tipc/socket.c:2874
 SYSC_setsockopt net/socket.c:1850 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1829
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007faf68703c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007faf687046d4 RCX: 0000000000453d69
RDX: 0000000000000087 RSI: 000000000000010f RDI: 0000000000000013
RBP: 000000000072bea0 R08: 000000000000001c R09: 0000000000000000
R10: 0000000020b89fe4 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005a6 R14: 00000000006f8830 R15: 0000000000000000
TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies.  Check SNMP counters.
xt_hashlimit: overflow, rate too high: 0
xt_hashlimit: overflow, rate too high: 0
--map-set only usable from mangle table
--map-set only usable from mangle table
BUG: sleeping function called from invalid context at net/core/sock.c:2772
in_atomic(): 1, irqs_disabled(): 0, pid: 303, name: kworker/u4:3
INFO: lockdep is turned off.
CPU: 0 PID: 303 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2772
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
syz-executor7 uses obsolete (PF_INET,SOCK_PACKET)
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
openvswitch: netlink: Message has 4 unknown bytes.
openvswitch: netlink: Message has 4 unknown bytes.
sctp: [Deprecated]: syz-executor1 (pid 5864) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor1 (pid 5864) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
sctp: [Deprecated]: syz-executor1 (pid 5876) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor1 (pid 5864) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
IPVS: ftp: loaded support on port[0] = 21
dccp_v6_rcv: dropped packet with invalid checksum
dccp_v6_rcv: dropped packet with invalid checksum
xt_connbytes: Forcing CT accounting to be enabled
BUG: sleeping function called from invalid context at net/core/sock.c:2772
in_atomic(): 1, irqs_disabled(): 0, pid: 303, name: kworker/u4:3
INFO: lockdep is turned off.
CPU: 0 PID: 303 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2772
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Either Ethernet header or EtherType is required.
xt_connbytes: Forcing CT accounting to be enabled
device lo entered promiscuous mode
openvswitch: netlink: Message has 8 unknown bytes.
openvswitch: netlink: Message has 8 unknown bytes.
netlink: 'syz-executor5': attribute type 4 has an invalid length.
syz-executor7 (6259) used greatest stack depth: 15264 bytes left
netlink: 'syz-executor5': attribute type 4 has an invalid length.
kauditd_printk_skb: 8 callbacks suppressed
audit: type=1400 audit(1519062355.715:38): avc:  denied  { setopt } for  pid=6319 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
syz-executor6 (6340) used greatest stack depth: 14384 bytes left
x_tables: ip6_tables: MASQUERADE target: used from hooks PREROUTING, but only usable from POSTROUTING
x_tables: ip6_tables: MASQUERADE target: used from hooks PREROUTING, but only usable from POSTROUTING
x_tables: ip6_tables: MASQUERADE target: used from hooks PREROUTING, but only usable from POSTROUTING
Cannot find del_set index 0 as target
audit: type=1400 audit(1519062356.276:39): avc:  denied  { ioctl } for  pid=6517 comm="syz-executor7" path="socket:[17460]" dev="sockfs" ino=17460 ioctlcmd=0x8946 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
audit: type=1400 audit(1519062356.278:40): avc:  denied  { getopt } for  pid=6517 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
kernel msg: ebtables bug: please report to author: entries_size too small
kernel msg: ebtables bug: please report to author: entries_size too small
audit: type=1400 audit(1519062356.770:41): avc:  denied  { net_broadcast } for  pid=6705 comm="syz-executor5" capability=11  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
audit: type=1400 audit(1519062357.166:42): avc:  denied  { accept } for  pid=6845 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
audit: type=1400 audit(1519062357.308:43): avc:  denied  { map } for  pid=6915 comm="syz-executor4" path="socket:[18494]" dev="sockfs" ino=18494 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=udp_socket permissive=1
NFQUEUE: number of total queues is 0
NFQUEUE: number of total queues is 0
NFQUEUE: number of total queues is 0
sctp: [Deprecated]: syz-executor2 (pid 7046) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
audit: type=1400 audit(1519062357.693:44): avc:  denied  { ioctl } for  pid=7049 comm="syz-executor4" path="socket:[18107]" dev="sockfs" ino=18107 ioctlcmd=0x89e2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=sock_file permissive=1
NFQUEUE: number of total queues is 0
sctp: [Deprecated]: syz-executor2 (pid 7065) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
NFQUEUE: number of total queues is 0
NFQUEUE: number of total queues is 0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 PID: 7139 Comm: syz-executor3 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3648
 __do_kmalloc_node mm/slab.c:3668 [inline]
 __kmalloc_node+0x33/0x70 mm/slab.c:3676
 kmalloc_node include/linux/slab.h:554 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:419
 kvmalloc include/linux/mm.h:541 [inline]
 xt_alloc_table_info+0x63/0xe0 net/netfilter/x_tables.c:1016
 do_replace net/ipv4/netfilter/arp_tables.c:970 [inline]
 do_arpt_set_ctl+0x29d/0x8d0 net/ipv4/netfilter/arp_tables.c:1458
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1261
 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2979
 SYSC_setsockopt net/socket.c:1850 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1829
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007f27b6e83c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f27b6e846d4 RCX: 0000000000453d69
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000418 R09: 0000000000000000
R10: 0000000020000be8 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000000004d3 R14: 00000000006f7468 R15: 0000000000000000
BUG: sleeping function called from invalid context at mm/slab.h:420
in_atomic(): 1, irqs_disabled(): 0, pid: 7159, name: syz-executor1
INFO: lockdep is turned off.
CPU: 0 PID: 7159 Comm: syz-executor1 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 slab_pre_alloc_hook mm/slab.h:420 [inline]
 slab_alloc mm/slab.c:3365 [inline]
 kmem_cache_alloc+0x2a2/0x760 mm/slab.c:3539
 rds_tcp_conn_alloc+0xa7/0x4e0 net/rds/tcp.c:293
 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227
 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309
 rds_sendmsg+0xe63/0x2550 net/rds/send.c:1153
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:639
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2047
 __sys_sendmsg+0xe5/0x210 net/socket.c:2081
 SYSC_sendmsg net/socket.c:2092 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2088
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007f5361092c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f53610936d4 RCX: 0000000000453d69
RDX: 0000000000000000 RSI: 00000000201c3000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b5 R14: 00000000006f7198 R15: 0000000000000000
rdma_op 0000000059f22c44 conn xmit_rdma           (null)
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 7179 Comm: syz-executor3 Tainted: G        W        4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3648
 __do_kmalloc_node mm/slab.c:3668 [inline]
 __kmalloc_node+0x33/0x70 mm/slab.c:3676
 kmalloc_node include/linux/slab.h:554 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:419
 kvmalloc include/linux/mm.h:541 [inline]
 kvmalloc_array include/linux/mm.h:557 [inline]
 xt_alloc_entry_offsets+0x21/0x30 net/netfilter/x_tables.c:779
 translate_table+0x2e0/0x1dd0 net/ipv4/netfilter/arp_tables.c:533
 do_replace net/ipv4/netfilter/arp_tables.c:981 [inline]
 do_arpt_set_ctl+0x394/0x8d0 net/ipv4/netfilter/arp_tables.c:1458
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1261
 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2979
 SYSC_setsockopt net/socket.c:1850 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1829
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007f27b6e83c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f27b6e846d4 RCX: 0000000000453d69
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000418 R09: 0000000000000000
R10: 0000000020000be8 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000000004d3 R14: 00000000006f7468 R15: 0000000000000001
net_ratelimit: 17 callbacks suppressed
arp_tables: arptables: counters copy to user failed while replacing table
audit: type=1400 audit(1519062359.160:45): avc:  denied  { setopt } for  pid=7208 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1
arp_tables: arptables: counters copy to user failed while replacing table
arp_tables: arptables: counters copy to user failed while replacing table
arp_tables: arptables: counters copy to user failed while replacing table
arp_tables: arptables: counters copy to user failed while replacing table
xt_CT: You must specify a L4 protocol, and not use inversions on it.
xt_CT: You must specify a L4 protocol, and not use inversions on it.
arp_tables: arptables: counters copy to user failed while replacing table
arp_tables: arptables: counters copy to user failed while replacing table
arp_tables: arptables: counters copy to user failed while replacing table