BUG: sleeping function called from invalid context at net/core/sock.c:2772
in_atomic(): 1, irqs_disabled(): 0, pid: 92, name: kworker/u4:3
5 locks held by kworker/u4:3/92:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000e5321f00>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<000000003851758f>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<00000000db3a8010>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<000000003a0efa5e>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
sctp: [Deprecated]: syz-executor3 (pid 8389) Use of int in max_burst socket option.
Use struct sctp_assoc_value instead
CPU: 0 PID: 92 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
sctp: [Deprecated]: syz-executor3 (pid 8405) Use of int in max_burst socket option.
Use struct sctp_assoc_value instead
 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

======================================================
WARNING: possible circular locking dependency detected
4.16.0-rc1+ #232 Tainted: G        W       
------------------------------------------------------
kworker/u4:3/92 is trying to acquire lock:
 (k-sk_lock-AF_TIPC){+.+.}, at: [<00000000866b3b22>] lock_sock include/net/sock.h:1463 [inline]
 (k-sk_lock-AF_TIPC){+.+.}, at: [<00000000866b3b22>] tipc_release+0x103/0xff0 net/tipc/socket.c:572

but task is already holding lock:
 (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&(&srv->idr_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_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

-> #3 (&(&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

-> #2 (&(&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

-> #1 (&(&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

-> #0 (k-sk_lock-AF_TIPC){+.+.}:
       lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
       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

other info that might help us debug this:

Chain exists of:
  k-sk_lock-AF_TIPC --> &(&sub->lock)->rlock --> &(&srv->idr_lock)->rlock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&(&srv->idr_lock)->rlock);
                               lock(&(&sub->lock)->rlock);
                               lock(&(&srv->idr_lock)->rlock);
  lock(k-sk_lock-AF_TIPC);

 *** DEADLOCK ***

5 locks held by kworker/u4:3/92:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000e5321f00>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<000000003851758f>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<00000000db3a8010>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<000000003a0efa5e>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000006b023b61>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685

stack backtrace:
CPU: 0 PID: 92 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
 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
 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
net_ratelimit: 119 callbacks suppressed
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
x_tables: ip6_tables: mh match: only valid for protocol 135
x_tables: ip6_tables: mh match: only valid for protocol 135
audit: type=1400 audit(1519059841.475:40): avc:  denied  { listen } for  pid=8629 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
validate_nla: 15 callbacks suppressed
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
netlink: 'syz-executor1': attribute type 1 has an invalid length.
sctp: [Deprecated]: syz-executor3 (pid 9132) Use of int in max_burst socket option.
Use struct sctp_assoc_value instead
ieee80211 phy2: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy3: Selected rate control algorithm 'minstrel_ht'
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9431 comm=syz-executor4
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9431 comm=syz-executor4
netlink: 112 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor0'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor0'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=52845 sclass=netlink_route_socket pig=9644 comm=syz-executor4
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=52845 sclass=netlink_route_socket pig=9644 comm=syz-executor4
netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'.
net_ratelimit: 190 callbacks suppressed
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Either Ethernet header or EtherType is required.
openvswitch: netlink: Port -1 exceeds max allowable 65535
audit: type=1400 audit(1519059846.158:41): avc:  denied  { connect } for  pid=9803 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
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Port -1 exceeds max allowable 65535
openvswitch: netlink: Port -1 exceeds max allowable 65535
RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma?
RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma?
x_tables: ip_tables: SYNPROXY target: used from hooks OUTPUT, but only usable from INPUT/FORWARD
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
ipt_CLUSTERIP: bad local_nodes[0] 0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 10389 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
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
audit: type=1400 audit(1519059847.962:42): avc:  denied  { write } for  pid=10385 comm="syz-executor2" path="socket:[26451]" dev="sockfs" ino=26451 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
 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+0x56/0x760 mm/slab.c:3629
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:986 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 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:00007f919f172c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f919f1736d4 RCX: 0000000000453d69
RDX: 0000000000000000 RSI: 0000000020d1d000 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000000004b1 R14: 00000000006f7138 R15: 0000000000000000
IPv6: NLM_F_REPLACE set, but no existing node found!
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 10421 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
 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_track_caller+0x33/0x70 mm/slab.c:3683
 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137
 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:986 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 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:00007f919f172c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f919f1736d4 RCX: 0000000000453d69
RDX: 0000000000000000 RSI: 0000000020d1d000 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000000004b1 R14: 00000000006f7138 R15: 0000000000000001
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 10441 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
 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 mm/slab.c:3365 [inline]
 __do_kmalloc mm/slab.c:3703 [inline]
 __kmalloc+0x63/0x760 mm/slab.c:3714
 kmalloc include/linux/slab.h:517 [inline]
 genl_family_rcv_msg+0xb65/0xfb0 net/netlink/genetlink.c:569
 genl_rcv_msg+0xb2/0x140 net/netlink/genetlink.c:624
 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2442
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635
 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline]
 netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897
 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:00007f919f172c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f919f1736d4 RCX: 0000000000453d69
RDX: 0000000000000000 RSI: 0000000020d1d000 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000000004b1 R14: 00000000006f7138 R15: 0000000000000002