======================================
| [   25.429867][  T240] 1 lock held by seq-ext_ipv6/240:
| [ 25.430016][ T240] #0: ffff888004f59098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   25.430335][  T240]
| [   25.430335][  T240] stack backtrace:
[   25.430776][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.431104][  T240] Call Trace:
[   25.431220][  T240]  <TASK>
[ 25.431299][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.431452][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.431603][ T240] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 25.431758][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.431912][ T240] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 25.432099][ T240] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 25.432251][ T240] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 25.432397][ T240] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 25.432543][ T240] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 25.432653][ T240] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 25.432831][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.432991][ T240] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.433137][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.433287][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.433432][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.433582][ T240] ? 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) 
[ 25.433727][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.433848][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.433996][ T240] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.434148][ T240] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 25.434293][ T240] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 25.434454][ T240] ? release_sock (net/core/sock.c:3630) 
[ 25.434597][ T240] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 25.434742][ T240] ? release_sock (net/core/sock.c:3630) 
[ 25.434891][ T240] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.435043][ T240] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 25.435188][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.435336][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.435480][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.435623][ T240] ? 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) 
[ 25.435768][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.435885][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.436042][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.436189][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.436334][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.436480][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.436624][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.436767][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.436916][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.437060][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.437208][ T240] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 25.437357][ T240] do_sock_getsockopt (net/socket.c:2396) 
[ 25.437501][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.437649][ T240] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 25.437807][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.437921][ T240] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 25.438067][ T240] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 25.438213][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.438360][ T240] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 25.438511][ T240] __x64_sys_getsockopt (net/socket.c:2432) 
[ 25.438655][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.438837][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.438983][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.439163][  T240] RIP: 0033:0x7f79c279446e
[ 25.439315][ T240] 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
[   25.439822][  T240] RSP: 002b:00007f79c1e3f978 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   25.440040][  T240] RAX: ffffffffffffffda RBX: 00007f79c1e3fcc0 RCX: 00007f79c279446e
[   25.440255][  T240] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   25.440480][  T240] RBP: 00007f79c1e3f990 R08: 00007f79c1e3f98c R09: 0000000000000064
[   25.440706][  T240] R10: 00007f79c1e3f990 R11: 0000000000000246 R12: 000000000000000a
[   25.440925][  T240] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   25.444252][  T240] 1 lock held by seq-ext_ipv6/240:
| [ 25.444400][ T240] #0: ffff888004f59098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   25.444671][  T240]
| [   25.444671][  T240] stack backtrace:
[   25.445112][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.445432][  T240] Call Trace:
[   25.445546][  T240]  <TASK>
[ 25.445624][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.445779][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.445933][ T240] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 25.446084][ T240] tcp_ao_do_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222) 
[ 25.446231][ T240] tcp_connect (net/ipv4/tcp_output.c:4114) 
[ 25.446379][ T240] ? rt6_get_cookie (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/ip6_fib.h:312) 
[ 25.446536][ T240] tcp_v6_connect (net/ipv6/tcp_ipv6.c:333) 
[ 25.446692][ T240] ? __pfx_tcp_v6_connect (net/ipv6/tcp_ipv6.c:137) 
[ 25.446844][ T240] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.446991][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.447150][ T240] ? 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) 
[ 25.447297][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.447414][ T240] __inet_stream_connect (net/ipv4/af_inet.c:677) 
[ 25.447562][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.447748][ T240] inet_stream_connect (net/ipv4/af_inet.c:749) 
[ 25.447897][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 25.448047][ T240] ? __pfx___sys_connect (net/socket.c:2078) 
[ 25.448193][ T240] ? do_fcntl (fs/fcntl.c:473) 
[ 25.448311][ T240] ? __fget_files (fs/file.c:1009) 
[ 25.448473][ T240] __x64_sys_connect (net/socket.c:2095) 
[ 25.448621][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.448774][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.448956][  T240] RIP: 0033:0x7f79c279440b
[ 25.449109][ T240] 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
[   25.449620][  T240] RSP: 002b:00007f79c1e3fac0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   25.449845][  T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f79c279440b
[   25.450065][  T240] RDX: 000000000000001c RSI: 00007f79c1e3fcc0 RDI: 000000000000000a
[   25.450283][  T240] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   25.450510][  T240] R10: 00007f79c264c598 R11: 0000000000000293 R12: 0000000000410210
[   25.450736][  T240] R13: 0000000000000005 R14: 00007f79c1e3fcc0 R15: 000000000000000a
| [   25.456065][  T240] 1 lock held by seq-ext_ipv6/240:
| [ 25.456232][ T240] #0: ffff888004f59098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   25.456518][  T240]
| [   25.456518][  T240] stack backtrace:
[   25.456966][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.457301][  T240] Call Trace:
[   25.457425][  T240]  <TASK>
[ 25.457507][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.457665][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.457820][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 25.457973][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 25.458127][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 25.458316][ T240] ? 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) 
[ 25.458474][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.458596][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 25.458785][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.458975][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 25.459127][ T240] ? 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)) 
[ 25.459249][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 25.459404][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.459554][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 25.459707][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 25.459895][ T240] ? 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) 
[ 25.460045][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.460167][ T240] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 25.460319][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.460526][ T240] __release_sock (net/core/sock.c:3079) 
[ 25.460683][ T240] release_sock (net/core/sock.c:3633) 
[ 25.460834][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 25.460989][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 25.461146][ T240] ? __pfx___sys_connect (net/socket.c:2078) 
[ 25.461296][ T240] ? do_fcntl (fs/fcntl.c:473) 
[ 25.461420][ T240] ? __fget_files (fs/file.c:1009) 
[ 25.461583][ T240] __x64_sys_connect (net/socket.c:2095) 
[ 25.461736][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.461890][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.462076][  T240] RIP: 0033:0x7f79c279440b
[ 25.462236][ T240] 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
[   25.462766][  T240] RSP: 002b:00007f79c1e3fac0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   25.462998][  T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f79c279440b
[   25.463224][  T240] RDX: 000000000000001c RSI: 00007f79c1e3fcc0 RDI: 000000000000000a
[   25.463455][  T240] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   25.463684][  T240] R10: 00007f79c264c598 R11: 0000000000000293 R12: 0000000000410210
[   25.463909][  T240] R13: 0000000000000005 R14: 00007f79c1e3fcc0 R15: 000000000000000a
| [   26.726560][  T240] 1 lock held by seq-ext_ipv6/240:
| [ 26.726707][ T240] #0: ffff888004f58298 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   26.727008][  T240]
| [   26.727008][  T240] stack backtrace:
[   26.727489][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.727805][  T240] Call Trace:
[   26.727916][  T240]  <TASK>
[ 26.727993][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 26.728143][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 26.728292][ T240] tcp_ao_set_repair (net/ipv4/tcp_ao.c:2399 (discriminator 7)) 
[ 26.728436][ T240] ? 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) 
[ 26.728584][ T240] ? __pfx_tcp_ao_set_repair (net/ipv4/tcp_ao.c:2371) 
[ 26.728739][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3924) 
[ 26.728887][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 26.729029][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 26.729183][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 26.729331][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 26.729475][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 26.729621][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 26.729763][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 26.729906][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 26.730056][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 26.730200][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 26.730357][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 26.730479][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 26.730626][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 26.730770][ T240] ? __fget_files (fs/file.c:1009) 
[ 26.730915][ T240] ? __pfx___sys_socket (net/socket.c:1712) 
[ 26.731067][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 26.731210][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 26.731391][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.731536][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.731717][  T240] RIP: 0033:0x7f79c279491e
[ 26.731868][ T240] 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
[   26.732366][  T240] RSP: 002b:00007f79c1e3fa78 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   26.732585][  T240] RAX: ffffffffffffffda RBX: 000000000000631b RCX: 00007f79c279491e
[   26.732800][  T240] RDX: 000000000000002a RSI: 0000000000000006 RDI: 000000000000000a
[   26.733021][  T240] RBP: 00005402b80d0120 R08: 0000000000000010 R09: 0000000000000064
[   26.733235][  T240] R10: 00007f79c1e3fb10 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