======================================
| [   27.526628][  T240] 1 lock held by key-management_/240:
| [ 27.526794][ T240] #0: ffff888007b0aa58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   27.527094][  T240]
| [   27.527094][  T240] stack backtrace:
[   27.527592][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.527943][  T240] Call Trace:
[   27.528072][  T240]  <TASK>
[ 27.528160][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.528328][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.528493][ T240] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 27.528655][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 27.528826][ T240] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 27.529024][ T240] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 27.529193][ T240] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 27.529354][ T240] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 27.529522][ T240] ? kasan_save_free_info (mm/kasan/generic.c:582) 
[ 27.529689][ T240] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 27.529853][ T240] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 27.529974][ T240] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 27.530162][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.530333][ T240] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 27.530495][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.530659][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.530825][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 27.530994][ 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) 
[ 27.531152][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.531284][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 27.531444][ T240] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 27.531609][ T240] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 27.531775][ T240] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 27.531952][ T240] ? release_sock (net/core/sock.c:3630) 
[ 27.532112][ T240] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 27.532272][ T240] ? release_sock (net/core/sock.c:3630) 
[ 27.532439][ T240] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 27.532600][ T240] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 27.532761][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.532930][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.533100][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 27.533259][ 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) 
[ 27.533425][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.533552][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.533726][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.533898][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.534056][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 27.534217][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 27.534389][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 27.534558][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.534722][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 27.534901][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 27.535068][ T240] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 27.535242][ T240] do_sock_getsockopt (net/socket.c:2396) 
[ 27.535401][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 27.535561][ T240] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 27.535728][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 27.535858][ T240] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 27.536022][ T240] ? __sys_setsockopt (net/socket.c:2360) 
[ 27.536194][ T240] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 27.536365][ T240] __x64_sys_getsockopt (net/socket.c:2432) 
[ 27.536524][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.536724][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.536896][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.537097][  T240] RIP: 0033:0x7f8dfbf4246e
[ 27.537275][ 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
[   27.537842][  T240] RSP: 002b:00007f8dfb5ed878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   27.538089][  T240] RAX: ffffffffffffffda RBX: 00007f8dfb5edb40 RCX: 00007f8dfbf4246e
[   27.538329][  T240] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   27.538569][  T240] RBP: 00007f8dfb5ed890 R08: 00007f8dfb5ed88c R09: 0000000000000064
[   27.538812][  T240] R10: 00007f8dfb5ed890 R11: 0000000000000246 R12: 000000000000000a
[   27.539054][  T240] R13: 0000000000000064 R14: 0000000000000020 R15: 0000000000000064
| [   27.541082][  T240] 1 lock held by key-management_/240:
| [ 27.541242][ T240] #0: ffff888007b0aa58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   27.541540][  T240]
| [   27.541540][  T240] stack backtrace:
[   27.542035][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.542391][  T240] Call Trace:
[   27.542512][  T240]  <TASK>
[ 27.542600][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.542765][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.542932][ T240] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 27.543096][ T240] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 27.543262][ T240] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 27.543421][ 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) 
[ 27.543590][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.543781][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 27.543960][ T240] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 27.544117][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 27.544281][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 27.544455][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.544614][ T240] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 27.544779][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.544942][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.545109][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 27.545271][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 27.545429][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 27.545590][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 27.545756][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 27.546067][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 27.546241][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 27.546361][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 27.546530][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 27.546771][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 27.546935][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 27.547102][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 27.547261][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.547547][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.547713][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.547914][  T240] RIP: 0033:0x7f8dfbf4291e
[ 27.548263][ 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
[   27.548908][  T240] RSP: 002b:00007f8dfb5eda08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   27.549230][  T240] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007f8dfbf4291e
[   27.549480][  T240] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   27.549730][  T240] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   27.550047][  T240] R10: 00007f8dfb5eda20 R11: 0000000000000246 R12: 000000000000000a
[   27.550285][  T240] R13: 0000000000000000 R14: 00007f8dfb5edb40 R15: 0000000000411c18
| [   27.552808][  T240] 1 lock held by key-management_/240:
| [ 27.552968][ T240] #0: ffff888007b0aa58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   27.553331][  T240]
| [   27.553331][  T240] stack backtrace:
[   27.553887][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.554237][  T240] Call Trace:
[   27.554367][  T240]  <TASK>
[ 27.554463][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.554625][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.554787][ T240] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 27.554946][ T240] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 27.555110][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.555435][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 27.555602][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 27.555763][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 27.555930][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.556170][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.556328][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.556492][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 27.556648][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 27.556802][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 27.557040][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 27.557204][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 27.557362][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 27.557528][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 27.557733][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 27.557899][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 27.558056][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 27.558224][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 27.558380][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.558572][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.558740][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.558930][  T240] RIP: 0033:0x7f8dfbf4291e
[ 27.559175][ 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
[   27.559737][  T240] RSP: 002b:00007f8dfb5eda48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   27.560054][  T240] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f8dfbf4291e
[   27.560289][  T240] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   27.560526][  T240] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007f8dfb5edaa0
[   27.560852][  T240] R10: 00007f8dfb5edaa0 R11: 0000000000000246 R12: 00000000000000c8
[   27.561086][  T240] R13: 000000000000000a R14: 00000000000000c8 R15: 00007f8dfb5edb30
| [   27.606681][  T240] 1 lock held by key-management_/240:
| [ 27.606848][ T240] #0: ffff888007b0b798 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   27.607145][  T240]
| [   27.607145][  T240] stack backtrace:
[   27.607622][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.607964][  T240] Call Trace:
[   27.608088][  T240]  <TASK>
[ 27.608172][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.608339][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.608503][ T240] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 27.608665][ T240] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 27.608861][ T240] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 27.609064][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.609188][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 27.609354][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 27.609518][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 27.609678][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.609845][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 27.610008][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.610163][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 27.610322][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 27.610484][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 27.610641][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 27.610811][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 27.610970][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 27.611138][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 27.611263][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 27.611425][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 27.611582][ T240] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 27.611745][ T240] ? __pfx___sys_socket (net/socket.c:1712) 
[ 27.611902][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.612105][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 27.612262][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.612460][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.612621][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.612819][  T240] RIP: 0033:0x7f8dfbf4291e
[ 27.612989][ 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
[   27.613551][  T240] RSP: 002b:00007f8dfb5edc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   27.613796][  T240] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007f8dfbf4291e
[   27.614036][  T240] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   27.614274][  T240] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   27.614542][  T240] R10: 00007f8dfb5edc80 R11: 0000000000000206 R12: 0000000000000009
[   27.614779][  T240] R13: 0000000000000000 R14: 00007f8dfbe92520 R15: 0000000000000000
| [   29.543573][  T240] 1 lock held by key-management_/240:
| [ 29.543725][ T240] #0: ffff88800d8ab798 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   29.544004][  T240]
| [   29.544004][  T240] stack backtrace:
[   29.544463][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.544796][  T240] Call Trace:
[   29.544913][  T240]  <TASK>
[ 29.544994][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.545155][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.545314][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 29.545466][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 29.545623][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 29.545809][ 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) 
[ 29.545965][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.546085][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 29.546271][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.546457][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 29.546611][ 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)) 
[ 29.546732][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.546886][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 29.547040][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.547189][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 29.547346][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 29.547532][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.547658][ T240] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1945) 
[ 29.547813][ T240] __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 29.547971][ T240] release_sock (net/core/sock.c:3633) 
[ 29.548120][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 29.548279][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 29.548435][ T240] ? __pfx___sys_connect (net/socket.c:2078) 
[ 29.548589][ T240] ? do_fcntl (fs/fcntl.c:473) 
[ 29.548706][ T240] ? __pfx_do_fcntl (fs/fcntl.c:443) 
[ 29.548859][ T240] ? __fget_files (fs/file.c:1009) 
[ 29.549023][ T240] __x64_sys_connect (net/socket.c:2095) 
[ 29.549175][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.549346][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.549537][  T240] RIP: 0033:0x7f8dfbf4240b
[ 29.549699][ 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
[   29.550231][  T240] RSP: 002b:00007f8dfb5edbc0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   29.550461][  T240] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007f8dfbf4240b
[   29.550695][  T240] RDX: 0000000000000010 RSI: 00007f8dfb5edc10 RDI: 0000000000000009
[   29.550922][  T240] RBP: 0000000000000009 R08: 0000000000000000 R09: 000000000041a500
[   29.551180][  T240] R10: 00007f8dfbdfa598 R11: 0000000000000293 R12: 00000000004141d0


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