======================================
| [   30.208152][  T243] 1 lock held by seq-ext_ipv6/243:
| [ 30.208336][ T243] #0: ffff888007029098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   30.208669][  T243]
| [   30.208669][  T243] stack backtrace:
[   30.209153][  T243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.209504][  T243] Call Trace:
[   30.209633][  T243]  <TASK>
[ 30.209721][ T243] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.209898][ T243] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.210064][ T243] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 30.210225][ T243] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 30.210393][ T243] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 30.210595][ T243] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 30.210760][ T243] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 30.210921][ T243] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 30.211110][ T243] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 30.211234][ T243] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 30.211427][ T243] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.211598][ T243] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 30.211757][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.211921][ T243] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.212079][ T243] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.212243][ T243] ? 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) 
[ 30.212407][ T243] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.212541][ T243] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.212701][ T243] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 30.212874][ T243] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 30.213037][ T243] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 30.213212][ T243] ? release_sock (net/core/sock.c:3630) 
[ 30.213372][ T243] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 30.213530][ T243] ? release_sock (net/core/sock.c:3630) 
[ 30.213692][ T243] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 30.213859][ T243] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 30.214020][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.214182][ T243] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 30.214339][ T243] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 30.214498][ T243] ? 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) 
[ 30.214660][ T243] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.214787][ T243] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.214984][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.215150][ T243] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.215309][ T243] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.215472][ T243] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 30.215628][ T243] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.215786][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.215948][ T243] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.216106][ T243] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 30.216268][ T243] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 30.216431][ T243] do_sock_getsockopt (net/socket.c:2396) 
[ 30.216594][ T243] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 30.216757][ T243] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 30.216922][ T243] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 30.217046][ T243] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 30.217208][ T243] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 30.217369][ T243] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 30.217533][ T243] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 30.217696][ T243] __x64_sys_getsockopt (net/socket.c:2432) 
[ 30.217857][ T243] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.218070][ T243] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.218235][ T243] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.218444][  T243] RIP: 0033:0x7ff9ed17146e
[ 30.218611][ T243] 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
[   30.219184][  T243] RSP: 002b:00007ff9ec81c978 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   30.219406][  T243] RAX: ffffffffffffffda RBX: 00007ff9ec81ccc0 RCX: 00007ff9ed17146e
[   30.219629][  T243] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   30.219871][  T243] RBP: 00007ff9ec81c990 R08: 00007ff9ec81c98c R09: 0000000000000064
[   30.220112][  T243] R10: 00007ff9ec81c990 R11: 0000000000000246 R12: 000000000000000a
[   30.220337][  T243] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   30.224186][  T243] 1 lock held by seq-ext_ipv6/243:
| [ 30.224347][ T243] #0: ffff888007029098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   30.224645][  T243]
| [   30.224645][  T243] stack backtrace:
[   30.225128][  T243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.225481][  T243] Call Trace:
[   30.225616][  T243]  <TASK>
[ 30.225705][ T243] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.225871][ T243] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.226041][ T243] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 30.226208][ T243] tcp_ao_do_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222) 
[ 30.226372][ T243] tcp_connect (net/ipv4/tcp_output.c:4114) 
[ 30.226541][ T243] ? rt6_get_cookie (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/ip6_fib.h:312) 
[ 30.226715][ T243] tcp_v6_connect (net/ipv6/tcp_ipv6.c:333) 
[ 30.226906][ T243] ? __pfx_tcp_v6_connect (net/ipv6/tcp_ipv6.c:137) 
[ 30.227088][ T243] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 30.227247][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.227406][ T243] ? 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) 
[ 30.227553][ T243] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.227672][ T243] __inet_stream_connect (net/ipv4/af_inet.c:677) 
[ 30.227823][ T243] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.228010][ T243] inet_stream_connect (net/ipv4/af_inet.c:749) 
[ 30.228163][ T243] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 30.228323][ T243] ? __pfx___sys_connect (net/socket.c:2078) 
[ 30.228473][ T243] ? do_fcntl (fs/fcntl.c:473) 
[ 30.228594][ T243] ? __fget_files (fs/file.c:1009) 
[ 30.228757][ T243] __x64_sys_connect (net/socket.c:2095) 
[ 30.228909][ T243] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.229089][ T243] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.229290][  T243] RIP: 0033:0x7ff9ed17140b
[ 30.229461][ T243] 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
[   30.230029][  T243] RSP: 002b:00007ff9ec81cac0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   30.230273][  T243] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007ff9ed17140b
[   30.230521][  T243] RDX: 000000000000001c RSI: 00007ff9ec81ccc0 RDI: 000000000000000a
[   30.230761][  T243] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   30.231026][  T243] R10: 00007ff9ed029598 R11: 0000000000000293 R12: 0000000000410210
[   30.231272][  T243] R13: 0000000000000005 R14: 00007ff9ec81ccc0 R15: 000000000000000a
| [   30.238425][  T243] 1 lock held by seq-ext_ipv6/243:
| [ 30.238590][ T243] #0: ffff888007029098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   30.238894][  T243]
| [   30.238894][  T243] stack backtrace:
[   30.239416][  T243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.239780][  T243] Call Trace:
[   30.239906][  T243]  <TASK>
[ 30.239995][ T243] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.240171][ T243] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.240344][ T243] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 30.240509][ T243] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 30.240676][ T243] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 30.240880][ T243] ? 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) 
[ 30.241049][ T243] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.241192][ T243] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 30.241397][ T243] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.241602][ T243] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 30.241768][ T243] ? 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)) 
[ 30.241906][ T243] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 30.242073][ T243] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.242238][ T243] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 30.242409][ T243] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 30.242612][ T243] ? 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) 
[ 30.242775][ T243] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 30.242923][ T243] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 30.243118][ T243] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.243328][ T243] __release_sock (net/core/sock.c:3079) 
[ 30.243499][ T243] release_sock (net/core/sock.c:3633) 
[ 30.243663][ T243] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 30.243831][ T243] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 30.244000][ T243] ? __pfx___sys_connect (net/socket.c:2078) 
[ 30.244162][ T243] ? do_fcntl (fs/fcntl.c:473) 
[ 30.244294][ T243] ? __fget_files (fs/file.c:1009) 
[ 30.244470][ T243] __x64_sys_connect (net/socket.c:2095) 
[ 30.244634][ T243] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.244801][ T243] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.245004][  T243] RIP: 0033:0x7ff9ed17140b
[ 30.245177][ T243] 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
[   30.245757][  T243] RSP: 002b:00007ff9ec81cac0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   30.246006][  T243] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007ff9ed17140b
[   30.246252][  T243] RDX: 000000000000001c RSI: 00007ff9ec81ccc0 RDI: 000000000000000a
[   30.246500][  T243] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   30.246756][  T243] R10: 00007ff9ed029598 R11: 0000000000000293 R12: 0000000000410210
[   30.247029][  T243] R13: 0000000000000005 R14: 00007ff9ec81ccc0 R15: 000000000000000a
| [   31.675601][  T243] 1 lock held by seq-ext_ipv6/243:
| [ 31.675779][ T243] #0: ffff888007028298 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   31.676168][  T243]
| [   31.676168][  T243] stack backtrace:
[   31.676636][  T243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.676977][  T243] Call Trace:
[   31.677259][  T243]  <TASK>
[ 31.677343][ T243] dump_stack_lvl (lib/dump_stack.c:123) 
[ 31.677518][ T243] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 31.677683][ T243] tcp_ao_set_repair (net/ipv4/tcp_ao.c:2399 (discriminator 7)) 
[ 31.677850][ T243] ? 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) 
[ 31.678015][ T243] ? __pfx_tcp_ao_set_repair (net/ipv4/tcp_ao.c:2371) 
[ 31.678189][ T243] do_tcp_setsockopt (net/ipv4/tcp.c:3924) 
[ 31.678448][ T243] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 31.678603][ T243] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 31.678777][ T243] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 31.678944][ T243] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 31.679098][ T243] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 31.679305][ T243] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 31.679461][ T243] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 31.679619][ T243] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 31.679782][ T243] do_sock_setsockopt (net/socket.c:2334) 
[ 31.679953][ T243] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 31.680119][ T243] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 31.680242][ T243] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 31.680399][ T243] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 31.680556][ T243] ? __fget_files (fs/file.c:1009) 
[ 31.680710][ T243] ? __pfx___sys_socket (net/socket.c:1712) 
[ 31.680875][ T243] __x64_sys_setsockopt (net/socket.c:2363) 
[ 31.681028][ T243] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 31.681231][ T243] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.681388][ T243] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.681582][  T243] RIP: 0033:0x7ff9ed17191e
[ 31.681744][ T243] 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
[   31.682291][  T243] RSP: 002b:00007ff9ec81ca78 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   31.682550][  T243] RAX: ffffffffffffffda RBX: 000000000000631b RCX: 00007ff9ed17191e
[   31.682785][  T243] RDX: 000000000000002a RSI: 0000000000000006 RDI: 000000000000000a
[   31.683051][  T243] RBP: 00005402b80d0120 R08: 0000000000000010 R09: 0000000000000064
[   31.683286][  T243] R10: 00007ff9ec81cb10 R11: 0000000000000202 R12: 0100000000000000


Finger prints:
lockdep_rcu_suspicious:tcp_ao_do_lookup:tcp_connect:tcp_v6_connect:__inet_stream_connect
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
lockdep_rcu_suspicious:tcp_ao_set_repair:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt