======================================
| [   24.819992][  T241] 1 lock held by restore_ipv6/241:
| [ 24.820136][ T241] #0: ffff8880053e9098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   24.820452][  T241]
| [   24.820452][  T241] stack backtrace:
[   24.820888][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.821203][  T241] Call Trace:
[   24.821343][  T241]  <TASK>
[ 24.821421][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.821575][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.821726][ T241] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 24.821875][ T241] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 24.822026][ T241] ? free_unref_page (mm/page_alloc.c:1102 mm/page_alloc.c:2638) 
[ 24.822177][ T241] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 24.822355][ T241] ? stack_depot_save_flags (lib/stackdepot.c:666) 
[ 24.822520][ T241] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 24.822680][ T241] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 24.822828][ T241] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 24.822939][ T241] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 24.823113][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.823267][ T241] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 24.823416][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.823562][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.823704][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.823851][ 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) 
[ 24.823995][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.824117][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.824261][ T241] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.824419][ T241] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 24.824571][ T241] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 24.824731][ T241] ? release_sock (net/core/sock.c:3630) 
[ 24.824874][ T241] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 24.825017][ T241] ? release_sock (net/core/sock.c:3630) 
[ 24.825163][ T241] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.825307][ T241] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 24.825450][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.825596][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.825743][ T241] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 24.825886][ 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) 
[ 24.826030][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.826145][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.826300][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.826455][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.826598][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.826742][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.826885][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 24.827031][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.827178][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.827319][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.827464][ T241] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 24.827613][ T241] do_sock_getsockopt (net/socket.c:2396) 
[ 24.827757][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 24.827904][ T241] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 24.828056][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 24.828174][ T241] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 24.828318][ T241] ? __sys_setsockopt (net/socket.c:2360) 
[ 24.828465][ T241] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 24.828625][ T241] __x64_sys_getsockopt (net/socket.c:2432) 
[ 24.828768][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.828946][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.829092][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.829272][  T241] RIP: 0033:0x7fc35e8eb46e
[ 24.829426][ T241] 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
[   24.829936][  T241] RSP: 002b:00007fc35df96838 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   24.830154][  T241] RAX: ffffffffffffffda RBX: 00007fc35df96af0 RCX: 00007fc35e8eb46e
[   24.830370][  T241] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   24.830588][  T241] RBP: 00007fc35df96850 R08: 00007fc35df9684c R09: 0000000000000064
[   24.830802][  T241] R10: 00007fc35df96850 R11: 0000000000000246 R12: 000000000000000a
[   24.831020][  T241] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   24.834713][  T241] 1 lock held by restore_ipv6/241:
| [ 24.834860][ T241] #0: ffff8880053e9098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   24.835131][  T241]
| [   24.835131][  T241] stack backtrace:
[   24.835626][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.835949][  T241] Call Trace:
[   24.836063][  T241]  <TASK>
[ 24.836142][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.836295][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.836456][ T241] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 24.836612][ T241] tcp_ao_do_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222) 
[ 24.836758][ T241] tcp_connect (net/ipv4/tcp_output.c:4114) 
[ 24.836913][ T241] ? rt6_get_cookie (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/ip6_fib.h:312) 
[ 24.837073][ T241] tcp_v6_connect (net/ipv6/tcp_ipv6.c:333) 
[ 24.837228][ T241] ? __pfx_tcp_v6_connect (net/ipv6/tcp_ipv6.c:137) 
[ 24.837378][ T241] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 24.837524][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.837679][ 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) 
[ 24.837828][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.837946][ T241] __inet_stream_connect (net/ipv4/af_inet.c:677) 
[ 24.838094][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.838280][ T241] inet_stream_connect (net/ipv4/af_inet.c:749) 
[ 24.838440][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 24.838590][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 24.838736][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 24.838852][ T241] ? __fget_files (fs/file.c:1009) 
[ 24.839009][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 24.839159][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.839307][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.839495][  T241] RIP: 0033:0x7fc35e8eb40b
[ 24.839652][ 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
[   24.840159][  T241] RSP: 002b:00007fc35df96bf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   24.840384][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc35e8eb40b
[   24.840600][  T241] RDX: 000000000000001c RSI: 00007fc35df96c40 RDI: 000000000000000a
[   24.840829][  T241] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   24.841046][  T241] R10: 00007fc35e7a3598 R11: 0000000000000293 R12: 0000000000410270
[   24.841296][  T241] R13: 0000000000000005 R14: 00007fc35df96c40 R15: ffffffffffffffe0
| [   24.863871][  T241] 1 lock held by restore_ipv6/241:
| [ 24.864032][ T241] #0: ffff8880053e9098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   24.864327][  T241]
| [   24.864327][  T241] stack backtrace:
[   24.864783][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.865128][  T241] Call Trace:
[   24.865245][  T241]  <TASK>
[ 24.865329][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.865484][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.865640][ T241] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 24.865793][ T241] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 24.865960][ T241] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 24.866146][ 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) 
[ 24.866300][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.866425][ T241] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 24.866614][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.866802][ T241] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 24.866967][ 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)) 
[ 24.867089][ T241] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 24.867242][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.867392][ T241] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 24.867546][ T241] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 24.867738][ 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) 
[ 24.867927][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.868134][ T241] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 24.868395][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.868722][ T241] __release_sock (net/core/sock.c:3079) 
[ 24.868991][ T241] release_sock (net/core/sock.c:3633) 
[ 24.869251][ T241] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 24.869514][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 24.869773][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 24.870028][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 24.870233][ T241] ? __fget_files (fs/file.c:1009) 
[ 24.870512][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 24.870770][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.871031][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.871340][  T241] RIP: 0033:0x7fc35e8eb40b
[ 24.871608][ 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
[   24.872212][  T241] RSP: 002b:00007fc35df96bf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   24.872443][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc35e8eb40b
[   24.872690][  T241] RDX: 000000000000001c RSI: 00007fc35df96c40 RDI: 000000000000000a
[   24.872931][  T241] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000415460
[   24.873161][  T241] R10: 00007fc35e7a3598 R11: 0000000000000293 R12: 0000000000410270
[   24.873387][  T241] R13: 0000000000000005 R14: 00007fc35df96c40 R15: ffffffffffffffe0
| [   24.901395][  T241] 1 lock held by restore_ipv6/241:
| [ 24.901555][ T241] #0: ffff8880053eba98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   24.901851][  T241]
| [   24.901851][  T241] stack backtrace:
[   24.902295][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.902630][  T241] Call Trace:
[   24.902741][  T241]  <TASK>
[ 24.902818][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.902965][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.903138][ T241] tcp_ao_set_repair (net/ipv4/tcp_ao.c:2399 (discriminator 7)) 
[ 24.903281][ 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) 
[ 24.903430][ T241] ? __pfx_tcp_ao_set_repair (net/ipv4/tcp_ao.c:2371) 
[ 24.903604][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3924) 
[ 24.903762][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 24.903905][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.904058][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.904234][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.904378][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 24.904522][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.904673][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 24.904815][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 24.904961][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 24.905107][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 24.905268][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 24.905401][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 24.905557][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 24.905713][ T241] ? __fget_files (fs/file.c:1009) 
[ 24.905866][ T241] ? __pfx___sys_socket (net/socket.c:1712) 
[ 24.906026][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 24.906201][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.906392][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.906547][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.906769][  T241] RIP: 0033:0x7fc35e8eb91e
[ 24.906927][ T241] 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
[   24.907444][  T241] RSP: 002b:00007fc35df969c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   24.907659][  T241] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc35e8eb91e
[   24.907888][  T241] RDX: 000000000000002a RSI: 0000000000000006 RDI: 0000000000000009
[   24.908098][  T241] RBP: 0000000000000009 R08: 0000000000000010 R09: 0000000000000064
[   24.908317][  T241] R10: 00007fc35df96ca0 R11: 0000000000000202 R12: 00007fc35df96b20


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