BUG: sleeping function called from invalid context at net/core/sock.c:2772
in_atomic(): 1, irqs_disabled(): 0, pid: 5, name: kworker/u4:0
5 locks held by kworker/u4:0/5:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000a610e53e>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000cff851ac>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<00000000b209f377>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<000000001bb311ff>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<00000000917a0d4b>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<00000000917a0d4b>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.16.0-rc1+ #232
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=36 sclass=netlink_audit_socket pig=5753 comm=syz-executor0
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
netlink: 'syz-executor4': attribute type 1 has an invalid length.

=============================
WARNING: suspicious RCU usage
4.16.0-rc1+ #232 Tainted: G        W       
-----------------------------
./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor6/5834:
 #0:  (rcu_read_lock){....}, at: [<000000009378a0a7>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218

stack backtrace:
CPU: 0 PID: 5834 Comm: syz-executor6 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
 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4592
 rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline]
 ___might_sleep+0x385/0x470 kernel/sched/core.c:6093
 __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_trace+0x299/0x740 mm/slab.c:3605
 kmalloc include/linux/slab.h:512 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126
 __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
 SYSC_sendto+0x361/0x5c0 net/socket.c:1748
 SyS_sendto+0x40/0x50 net/socket.c:1716
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007f1714a68c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1714a696d4 RCX: 0000000000453d69
RDX: 0000000000000001 RSI: 0000000020218000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000020062000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000
DRBG: could not allocate digest TFM handle: hmac(sha384)
x_tables: ip_tables: ah match: only valid for protocol 51
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=5896 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=5921 comm=syz-executor3
xt_connbytes: Forcing CT accounting to be enabled
syz-executor2 uses obsolete (PF_INET,SOCK_PACKET)
netlink: 28 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor6'.
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
openvswitch: netlink: Flow actions attr not present in new flow.
audit: type=1400 audit(1519071537.789:29): avc:  denied  { accept } for  pid=6061 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
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
openvswitch: netlink: Flow actions attr not present in new flow.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
xt_recent: hitcount (65535) is larger than allowed maximum (255)
xt_recent: hitcount (65535) is larger than allowed maximum (255)
x_tables: ip_tables: ah match: only valid for protocol 51
audit: type=1400 audit(1519071538.339:30): avc:  denied  { create } for  pid=6198 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_crypto_socket permissive=1

======================================================
WARNING: possible circular locking dependency detected
4.16.0-rc1+ #232 Tainted: G        W       
audit: type=1400 audit(1519071538.356:31): avc:  denied  { ioctl } for  pid=6198 comm="syz-executor4" path="socket:[15160]" dev="sockfs" ino=15160 ioctlcmd=0x89ee scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1
------------------------------------------------------
syz-executor1/6206 is trying to acquire lock:
 (&(&srv->idr_lock)->rlock){+...}, at: [<0000000074734f77>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 (&(&srv->idr_lock)->rlock){+...}, at: [<0000000074734f77>] tipc_conn_lookup+0x1f/0x90 net/tipc/topsrv.c:225

but task is already holding lock:
 (&(&sub->lock)->rlock){+...}, at: [<00000000f89c5dcd>] spin_lock include/linux/spinlock.h:310 [inline]
 (&(&sub->lock)->rlock){+...}, at: [<00000000f89c5dcd>] 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
       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

-> #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
mip6: mip6_destopt_init_state: state's mode is not 2: 0
       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
mip6: mip6_destopt_init_state: state's mode is not 2: 0
       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-executor1/6206:
 #0:  (sk_lock-AF_TIPC){+.+.}, at: [<000000002bd52c41>] lock_sock include/net/sock.h:1463 [inline]
 #0:  (sk_lock-AF_TIPC){+.+.}, at: [<000000002bd52c41>] tipc_setsockopt+0x13f/0xcf0 net/tipc/socket.c:2847
 #1:  (&(&tn->nametbl_lock)->rlock){+...}, at: [<00000000838f986e>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #1:  (&(&tn->nametbl_lock)->rlock){+...}, at: [<00000000838f986e>] tipc_nametbl_publish+0x1ff/0x4f0 net/tipc/name_table.c:754
 #2:  (&(&nseq->lock)->rlock){+...}, at: [<000000009ce46fe9>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #2:  (&(&nseq->lock)->rlock){+...}, at: [<000000009ce46fe9>] tipc_nametbl_insert_publ+0x2da/0x1850 net/tipc/name_table.c:488
 #3:  (&(&sub->lock)->rlock){+...}, at: [<00000000f89c5dcd>] spin_lock include/linux/spinlock.h:310 [inline]
 #3:  (&(&sub->lock)->rlock){+...}, at: [<00000000f89c5dcd>] tipc_sub_report_overlap+0x3ce/0x4f0 net/tipc/subscr.c:97

stack backtrace:
CPU: 1 PID: 6206 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
 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:00007f02c2f48c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f02c2f496d4 RCX: 0000000000453d69
RDX: 0000000000000087 RSI: 000000000000010f RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000020265000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005a6 R14: 00000000006f8830 R15: 0000000000000000
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: 5, name: kworker/u4:0
INFO: lockdep is turned off.
CPU: 0 PID: 5 Comm: kworker/u4:0 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
audit: type=1400 audit(1519071539.439:32): avc:  denied  { map } for  pid=6321 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=16480 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1
 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
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=28 sclass=netlink_audit_socket pig=6396 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=28 sclass=netlink_audit_socket pig=6408 comm=syz-executor2
TCP: request_sock_TCPv6: Possible SYN flooding on port 20010. Sending cookies.  Check SNMP counters.
sctp: [Deprecated]: syz-executor5 (pid 6453) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor5 (pid 6453) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
audit: type=1400 audit(1519071540.344:33): avc:  denied  { setopt } for  pid=6521 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: 8 bytes leftover after parsing attributes in process `syz-executor5'.
audit: type=1400 audit(1519071540.576:34): avc:  denied  { shutdown } for  pid=6588 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=netlink_netfilter_socket permissive=1
netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'.
audit: type=1400 audit(1519071540.888:35): avc:  denied  { ioctl } for  pid=6700 comm="syz-executor5" path="socket:[17716]" dev="sockfs" ino=17716 ioctlcmd=0x660b 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: 'syz-executor6': attribute type 10 has an invalid length.
openvswitch: netlink: Either Ethernet header or EtherType is required.
sctp: [Deprecated]: syz-executor4 (pid 6835) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
xt_connbytes: Forcing CT accounting to be enabled
TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies.  Check SNMP counters.
sctp: [Deprecated]: syz-executor4 (pid 6835) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
audit: type=1400 audit(1519071541.397:36): avc:  denied  { accept } for  pid=6867 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
audit: type=1400 audit(1519071541.675:37): avc:  denied  { create } for  pid=6993 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_iscsi_socket permissive=1
netlink: 'syz-executor6': attribute type 21 has an invalid length.
audit: type=1400 audit(1519071541.975:38): avc:  denied  { getopt } for  pid=7085 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=netlink_generic_socket permissive=1
xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables
netlink: 17 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'.
device syz2 entered promiscuous mode
device syz2 left promiscuous mode
audit: type=1400 audit(1519071542.420:39): avc:  denied  { setopt } for  pid=7248 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1
netlink: 'syz-executor6': attribute type 10 has an invalid length.
netlink: 'syz-executor6': attribute type 10 has an invalid length.
audit: type=1400 audit(1519071543.008:40): avc:  denied  { net_broadcast } for  pid=7471 comm="syz-executor6" 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
audit: type=1400 audit(1519071543.047:41): avc:  denied  { getopt } for  pid=7479 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_crypto_socket permissive=1
BUG: sleeping function called from invalid context at mm/slab.h:420
in_atomic(): 1, irqs_disabled(): 0, pid: 7693, name: syz-executor5
INFO: lockdep is turned off.
CPU: 1 PID: 7693 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
 ___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
 SYSC_sendto+0x361/0x5c0 net/socket.c:1748
 SyS_sendto+0x40/0x50 net/socket.c:1716
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453d69
RSP: 002b:00007f1f83cd9c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1f83cda6d4 RCX: 0000000000453d69
RDX: 0000000000000000 RSI: 0000000020fc2000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 000000002069affb R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000
netlink: 'syz-executor3': attribute type 1 has an invalid length.
netlink: 'syz-executor3': attribute type 1 has an invalid length.
netlink: 2 bytes leftover after parsing attributes in process `syz-executor2'.
xt_HL: TTL: invalid or unknown mode 3
sctp: [Deprecated]: syz-executor6 (pid 7809) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
netlink: 2 bytes leftover after parsing attributes in process `syz-executor2'.
xt_HL: TTL: invalid or unknown mode 3
sctp: [Deprecated]: syz-executor6 (pid 7809) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
x_tables: ip_tables: ah match: only valid for protocol 51
x_tables: ip_tables: ah match: only valid for protocol 51
netlink: 13 bytes leftover after parsing attributes in process `syz-executor7'.
Cannot find map_set index 0 as target
netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'.
netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'.
audit: type=1400 audit(1519071544.777:42): avc:  denied  { prog_run } for  pid=7947 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=bpf permissive=1
kernel msg: ebtables bug: please report to author: Unknown flag for bitmask
kernel msg: ebtables bug: please report to author: Unknown flag for bitmask
netlink: 'syz-executor6': attribute type 1 has an invalid length.
netlink: 'syz-executor5': attribute type 21 has an invalid length.
netlink: 'syz-executor5': attribute type 1 has an invalid length.
netlink: 'syz-executor6': attribute type 1 has an invalid length.
netlink: 'syz-executor5': attribute type 21 has an invalid length.
Unknown options in mask 4
Unknown options in mask 4
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=770 sclass=netlink_audit_socket pig=8190 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=770 sclass=netlink_audit_socket pig=8190 comm=syz-executor3
kauditd_printk_skb: 5 callbacks suppressed
audit: type=1400 audit(1519071545.560:48): avc:  denied  { create } for  pid=8233 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1