======================================
| [   30.556403][  T233] 1 lock held by bench-lookups_i/233:
| [ 30.556575][ T233] #0: ffff888006d71098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   30.556910][  T233]
| [   30.556910][  T233] stack backtrace:
[   30.557385][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.557742][  T233] Call Trace:
[   30.557873][  T233]  <TASK>
[ 30.557961][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.558133][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.558300][ T233] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 30.558462][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.558633][ T233] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 30.558834][ T233] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 30.558994][ T233] ? __pte_offset_map_lock (./include/linux/pgtable.h:324 ./include/linux/pgtable.h:594 mm/pgtable-generic.c:376) 
[ 30.559162][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 30.559323][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 30.559490][ T233] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 30.559681][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.559853][ T233] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 30.560013][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.560178][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.560336][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.560497][ T233] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 30.560662][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.560799][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.560959][ T233] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.561121][ T233] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 30.561279][ T233] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 30.561453][ T233] ? release_sock (net/core/sock.c:3630) 
[ 30.561615][ T233] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 30.561775][ T233] ? release_sock (net/core/sock.c:3630) 
[ 30.561939][ T233] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 30.562098][ T233] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 30.562260][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.562424][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.562582][ T233] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 30.562742][ T233] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 30.562903][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.563029][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.563200][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.563365][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.563525][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.563686][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 30.563843][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.564002][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.564166][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.564329][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.564491][ T233] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 30.564658][ T233] do_sock_getsockopt (net/socket.c:2396) 
[ 30.564821][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 30.564997][ T233] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 30.565170][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 30.565298][ T233] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 30.565464][ T233] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 30.565628][ T233] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 30.565803][ T233] __x64_sys_getsockopt (net/socket.c:2432) 
[ 30.565971][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.566188][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.566419][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.566741][  T233] RIP: 0033:0x7f206e14d46e
[ 30.566984][ T233] Code: 1f 44 00 00 48 8b 15 91 99 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb b8 0f 1f 44 00 00 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 59
All code
========
   0:	1f                   	(bad)
   1:	44 00 00             	add    %r8b,(%rax)
   4:	48 8b 15 91 99 0a 00 	mov    0xa9991(%rip),%rdx        # 0xa999c
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
  15:	eb b8                	jmp    0xffffffffffffffcf
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 37 00 00 00       	mov    $0x37,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	59                   	pop    %rcx

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	59                   	pop    %rcx
[   30.567741][  T233] RSP: 002b:00007ffde93939b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   30.568101][  T233] RAX: ffffffffffffffda RBX: 00007ffde9393c70 RCX: 00007f206e14d46e
[   30.568459][  T233] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   30.568830][  T233] RBP: 00007ffde93939d0 R08: 00007ffde93939cc R09: 0000000000000064
[   30.569199][  T233] R10: 00007ffde93939d0 R11: 0000000000000246 R12: 0000000000000009
[   30.569577][  T233] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   30.572635][  T233] 1 lock held by bench-lookups_i/233:
| [ 30.572901][ T233] #0: ffff888006d71098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   30.573415][  T233]
| [   30.573415][  T233] stack backtrace:
[   30.574174][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.574716][  T233] Call Trace:
[   30.574919][  T233]  <TASK>
[ 30.575070][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.575326][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.575592][ T233] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 30.575851][ T233] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 30.576115][ T233] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 30.576770][ T233] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 30.576974][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 30.577150][ T233] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 30.577352][ T233] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 30.577517][ T233] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 30.577710][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.577916][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.578125][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.578370][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 30.578605][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 30.578834][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 30.579072][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.579492][ T233] do_sock_setsockopt (net/socket.c:2334) 
[ 30.579754][ T233] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 30.580017][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 30.580217][ T233] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 30.580462][ T233] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 30.580863][ T233] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 30.581141][ T233] __x64_sys_setsockopt (net/socket.c:2363) 
[ 30.581388][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.581707][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.581983][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.582292][  T233] RIP: 0033:0x7f206e14d91e
[ 30.582553][ T233] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   30.583550][  T233] RSP: 002b:00007ffde9393b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   30.583913][  T233] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f206e14d91e
[   30.584415][  T233] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 0000000000000009
[   30.584770][  T233] RBP: 0000000000000009 R08: 0000000000000120 R09: 0029383231736561
[   30.585153][  T233] R10: 00007ffde9393b50 R11: 0000000000000246 R12: 00007ffde9393c70
[   30.585662][  T233] R13: 0000000000414380 R14: 0000000000000200 R15: 00000000260d61a0
| [   30.822877][  T241] 1 lock held by bench-lookups_i/241:
| [ 30.823047][ T241] #0: ffff888006d70298 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   30.823347][  T241]
| [   30.823347][  T241] stack backtrace:
[   30.823833][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.824226][  T241] Call Trace:
[   30.824345][  T241]  <TASK>
[ 30.824429][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.824601][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.824770][ T241] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 30.824922][ T241] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 30.825111][ T241] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 30.825311][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 30.825469][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.825590][ T241] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 30.825790][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.825985][ T241] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 30.826156][ T241] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:395 (discriminator 4) kernel/time/timekeeping.c:403 (discriminator 4) kernel/time/timekeeping.c:850 (discriminator 4)) 
[ 30.826283][ T241] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 30.826468][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.826623][ T241] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 30.826781][ T241] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 30.827296][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 30.827449][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.827595][ T241] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 30.827771][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.827965][ T241] __release_sock (net/core/sock.c:3079) 
[ 30.828134][ T241] release_sock (net/core/sock.c:3633) 
[ 30.828289][ T241] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 30.828452][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 30.828617][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 30.828770][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 30.828892][ T241] ? __fget_files (fs/file.c:1009) 
[ 30.829059][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 30.829215][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.829370][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.829559][  T241] RIP: 0033:0x7f206e14d40b
[ 30.829724][ T241] Code: 83 ec 18 89 54 24 0c 48 89 34 24 89 7c 24 08 e8 eb c7 f4 ff 8b 54 24 0c 48 8b 34 24 41 89 c0 8b 7c 24 08 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 08 e8 41 c8 f4 ff 8b 44
All code
========
   0:	83 ec 18             	sub    $0x18,%esp
   3:	89 54 24 0c          	mov    %edx,0xc(%rsp)
   7:	48 89 34 24          	mov    %rsi,(%rsp)
   b:	89 7c 24 08          	mov    %edi,0x8(%rsp)
   f:	e8 eb c7 f4 ff       	call   0xfffffffffff4c7ff
  14:	8b 54 24 0c          	mov    0xc(%rsp),%edx
  18:	48 8b 34 24          	mov    (%rsp),%rsi
  1c:	41 89 c0             	mov    %eax,%r8d
  1f:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  23:	b8 2a 00 00 00       	mov    $0x2a,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 35                	ja     0x67
  32:	44 89 c7             	mov    %r8d,%edi
  35:	89 44 24 08          	mov    %eax,0x8(%rsp)
  39:	e8 41 c8 f4 ff       	call   0xfffffffffff4c87f
  3e:	8b                   	.byte 0x8b
  3f:	44                   	rex.R

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 35                	ja     0x3d
   8:	44 89 c7             	mov    %r8d,%edi
   b:	89 44 24 08          	mov    %eax,0x8(%rsp)
   f:	e8 41 c8 f4 ff       	call   0xfffffffffff4c855
  14:	8b                   	.byte 0x8b
  15:	44                   	rex.R
[   30.830347][  T241] RSP: 002b:00007f206d7f9cd0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   30.830711][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f206e14d40b
[   30.831085][  T241] RDX: 000000000000001c RSI: 00007f206d7f9d20 RDI: 000000000000000a
[   30.831468][  T241] RBP: 000000000000000a R08: 0000000000000000 R09: 00007f206e2e8080
[   30.831880][  T241] R10: 00007f206e005598 R11: 0000000000000293 R12: 000000000040dab0
[   30.832264][  T241] R13: 0000000000000005 R14: 00007f206d7f9d20 R15: 00000000004143f8
| [   33.084305][  T233] 1 lock held by bench-lookups_i/233:
| [ 33.084575][ T233] #0: ffff888006d71098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   33.085080][  T233]
| [   33.085080][  T233] stack backtrace:
[   33.085818][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.086374][  T233] Call Trace:
[   33.086568][  T233]  <TASK>
[ 33.086708][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 33.086979][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 33.087246][ T233] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 33.087527][ T233] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 33.087800][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 33.088087][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 33.088356][ T233] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 33.088618][ T233] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 33.088878][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 33.089151][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 33.089429][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 33.089694][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 33.089942][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 33.090191][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 33.090438][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 33.090701][ T233] do_sock_setsockopt (net/socket.c:2334) 
[ 33.090946][ T233] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 33.091211][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 33.091410][ T233] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 33.091663][ T233] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 33.091905][ T233] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 33.092206][ T233] ? trace_rcu_segcb_stats (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:570 ./include/linux/cpumask.h:1117 ./include/trace/events/rcu.h:537) 
[ 33.092453][ T233] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 33.092777][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 33.093071][ T233] __x64_sys_setsockopt (net/socket.c:2363) 
[ 33.093302][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 33.093602][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.093852][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.094157][  T233] RIP: 0033:0x7f206e14d91e
[ 33.094439][ T233] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   33.095326][  T233] RSP: 002b:00007ffde9393c68 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   33.095698][  T233] RAX: ffffffffffffffda RBX: 0000000000414380 RCX: 00007f206e14d91e
[   33.096062][  T233] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   33.096444][  T233] RBP: 0000000000402dd0 R08: 0000000000000090 R09: 00007f206e2e8080
[   33.096832][  T233] R10: 00007ffde9393ce0 R11: 0000000000000202 R12: 0000000000000009


Finger prints:
lockdep_rcu_suspicious:tcp_ao_del_cmd:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt
lockdep_rcu_suspicious:tcp_ao_add_cmd:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt
lockdep_rcu_suspicious:tcp_ao_finish_connect:tcp_finish_connect:tcp_rcv_synsent_state_process:tcp_rcv_state_process
lockdep_rcu_suspicious:tcp_ao_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt