======================================
| [   29.619313][  T242] 1 lock held by key-management_/242:
| [ 29.619950][ T242] #0: ffff888003681098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   29.620507][  T242]
| [   29.620507][  T242] stack backtrace:
[   29.621296][  T242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.621839][  T242] Call Trace:
[   29.622054][  T242]  <TASK>
[ 29.622191][ T242] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.622457][ T242] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.622727][ T242] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 29.622980][ T242] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.623244][ T242] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 29.623557][ T242] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 29.623815][ T242] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 29.624056][ T242] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 29.624309][ T242] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 29.624513][ T242] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 29.624828][ T242] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.625102][ T242] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 29.625351][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.625611][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.625866][ T242] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.626111][ T242] ? 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) 
[ 29.626377][ T242] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.626593][ T242] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.626852][ T242] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.627121][ T242] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 29.627358][ T242] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 29.627626][ T242] ? release_sock (net/core/sock.c:3630) 
[ 29.627871][ T242] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 29.628113][ T242] ? release_sock (net/core/sock.c:3630) 
[ 29.628385][ T242] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 29.628641][ T242] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 29.628896][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.629150][ T242] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 29.629410][ T242] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 29.630004][ T242] ? 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) 
[ 29.630272][ T242] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.630497][ T242] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.630774][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.631040][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.631278][ T242] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.631529][ T242] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.631766][ T242] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.632019][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.632263][ T242] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.632511][ T242] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.632779][ T242] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 29.633035][ T242] do_sock_getsockopt (net/socket.c:2396) 
[ 29.633276][ T242] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.633527][ T242] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 29.633796][ T242] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.633999][ T242] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 29.634269][ T242] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 29.634541][ T242] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 29.634809][ T242] __x64_sys_getsockopt (net/socket.c:2432) 
[ 29.635053][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.635359][ T242] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.635628][ T242] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.635923][  T242] RIP: 0033:0x7f289c22146e
[ 29.636184][ T242] 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
[   29.637118][  T242] RSP: 002b:00007f289b8cc878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   29.637513][  T242] RAX: ffffffffffffffda RBX: 00007f289b8ccb40 RCX: 00007f289c22146e
[   29.637885][  T242] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   29.638381][  T242] RBP: 00007f289b8cc890 R08: 00007f289b8cc88c R09: 0000000000000064
[   29.638768][  T242] R10: 00007f289b8cc890 R11: 0000000000000246 R12: 000000000000000a
[   29.639137][  T242] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   29.642170][  T242] 1 lock held by key-management_/242:
| [ 29.642399][ T242] #0: ffff888003681098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.642945][  T242]
| [   29.642945][  T242] stack backtrace:
[   29.643711][  T242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.644254][  T242] Call Trace:
[   29.644445][  T242]  <TASK>
[ 29.644584][ T242] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.644841][ T242] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.645113][ T242] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 29.645362][ T242] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 29.645646][ T242] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 29.645908][ T242] ? 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) 
[ 29.646234][ T242] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.646522][ T242] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.646780][ T242] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.647048][ T242] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.647291][ T242] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.647570][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.647841][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.648092][ T242] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.648337][ T242] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.648579][ T242] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.648803][ T242] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.649062][ T242] do_sock_setsockopt (net/socket.c:2334) 
[ 29.649309][ T242] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.649570][ T242] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.649772][ T242] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.650044][ T242] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.650297][ T242] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 29.650568][ T242] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.650811][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.651131][ T242] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.651382][ T242] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.651685][  T242] RIP: 0033:0x7f289c22191e
[ 29.651944][ T242] 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
[   29.652774][  T242] RSP: 002b:00007f289b8cca08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   29.653200][  T242] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007f289c22191e
[   29.653589][  T242] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   29.653961][  T242] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   29.654340][  T242] R10: 00007f289b8cca20 R11: 0000000000000246 R12: 000000000000000a
[   29.654716][  T242] R13: 0000000000000000 R14: 00007f289b8ccb40 R15: 0000000000411c28
| [   29.658784][  T242] 1 lock held by key-management_/242:
| [ 29.659016][ T242] #0: ffff888003681098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.659485][  T242]
| [   29.659485][  T242] stack backtrace:
[   29.660150][  T242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.660638][  T242] Call Trace:
[   29.660809][  T242]  <TASK>
[ 29.660935][ T242] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.661169][ T242] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.661397][ T242] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 29.661650][ T242] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 29.661923][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.662198][ T242] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.662468][ T242] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.662725][ T242] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.662971][ T242] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.663215][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.663458][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.663696][ T242] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.663924][ T242] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.664153][ T242] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.664390][ T242] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.664635][ T242] do_sock_setsockopt (net/socket.c:2334) 
[ 29.664881][ T242] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.665180][ T242] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.665377][ T242] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.665628][ T242] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.665877][ T242] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 29.666133][ T242] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.666365][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.666658][ T242] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.666895][ T242] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.667191][  T242] RIP: 0033:0x7f289c22191e
[ 29.667440][ T242] 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
[   29.668301][  T242] RSP: 002b:00007f289b8cca28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   29.668647][  T242] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f289c22191e
[   29.668873][  T242] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   29.669096][  T242] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007f289b8ccaa0
[   29.669311][  T242] R10: 00007f289b8ccaa0 R11: 0000000000000246 R12: 00000000000000c8
[   29.669630][  T242] R13: 000000000000000a R14: 00000000000000c8 R15: 00007f289b8ccb30
| [   29.697936][  T242] 1 lock held by key-management_/242:
| [ 29.698190][ T242] #0: ffff888003681e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.698734][  T242]
| [   29.698734][  T242] stack backtrace:
[   29.699478][  T242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.700013][  T242] Call Trace:
[   29.700206][  T242]  <TASK>
[ 29.700339][ T242] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.700590][ T242] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.700852][ T242] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 29.701099][ T242] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 29.701404][ T242] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 29.701621][ T242] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.701759][ T242] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.701912][ T242] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.702063][ T242] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.702207][ T242] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.702363][ T242] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.702513][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.702678][ T242] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.702826][ T242] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.702970][ T242] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.703118][ T242] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.703277][ T242] do_sock_setsockopt (net/socket.c:2334) 
[ 29.703429][ T242] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.703583][ T242] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.703713][ T242] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.703872][ T242] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.704017][ T242] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.704177][ T242] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.704325][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.704515][ T242] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.704668][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.704865][ T242] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.705015][ T242] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.705200][  T242] RIP: 0033:0x7f289c22191e
[ 29.705353][ T242] 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
[   29.705872][  T242] RSP: 002b:00007f289b8ccc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   29.706096][  T242] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007f289c22191e
[   29.706328][  T242] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   29.706545][  T242] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   29.706777][  T242] R10: 00007f289b8ccc80 R11: 0000000000000206 R12: 0000000000000009
[   29.707010][  T242] R13: 0000000000000000 R14: 00007f289c171520 R15: 0000000000000000
| [   31.253428][  T242] 1 lock held by key-management_/242:
| [ 31.253684][ T242] #0: ffff888007791e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   31.254175][  T242]
| [   31.254175][  T242] stack backtrace:
[   31.254939][  T242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.255493][  T242] Call Trace:
[   31.255689][  T242]  <TASK>
[ 31.255827][ T242] dump_stack_lvl (lib/dump_stack.c:123) 
[ 31.256092][ T242] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 31.256356][ T242] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 31.256616][ T242] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 31.256879][ T242] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 31.257189][ T242] ? 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) 
[ 31.257456][ T242] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 31.257662][ T242] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 31.257986][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 31.258316][ T242] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 31.258573][ T242] ? 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)) 
[ 31.258777][ T242] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 31.259037][ T242] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 31.259296][ T242] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 31.259565][ T242] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 31.259880][ T242] ? 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) 
[ 31.260137][ T242] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 31.260338][ T242] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 31.260608][ T242] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 31.260931][ T242] __release_sock (net/core/sock.c:3079) 
[ 31.261206][ T242] release_sock (net/core/sock.c:3633) 
[ 31.261472][ T242] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 31.261740][ T242] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 31.261999][ T242] ? __pfx___sys_connect (net/socket.c:2078) 
[ 31.262261][ T242] ? do_fcntl (fs/fcntl.c:473) 
[ 31.262464][ T242] ? __fget_files (fs/file.c:1009) 
[ 31.262745][ T242] __x64_sys_connect (net/socket.c:2095) 
[ 31.262998][ T242] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.263279][ T242] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.263603][  T242] RIP: 0033:0x7f289c22140b
[ 31.263877][ T242] 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
[   31.264797][  T242] RSP: 002b:00007f289b8ccbb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   31.265203][  T242] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f289c22140b
[   31.265590][  T242] RDX: 000000000000001c RSI: 00007f289b8ccc00 RDI: 0000000000000009
[   31.266000][  T242] RBP: 0000000000000009 R08: 0000000000000000 R09: 00000000ffffffff
[   31.266392][  T242] R10: 00007f289c0d9598 R11: 0000000000000293 R12: 00000000004141f0


Finger prints:
lockdep_rcu_suspicious:tcp_ao_established_key: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
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