======================================
| [   25.970950][  T241] 1 lock held by key-management_/241:
| [ 25.971099][ T241] #0: ffff888005d99098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   25.971447][  T241]
| [   25.971447][  T241] stack backtrace:
[   25.971896][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.972224][  T241] Call Trace:
[   25.972340][  T241]  <TASK>
[ 25.972424][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.972578][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.972733][ T241] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 25.972886][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.973044][ T241] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 25.973226][ T241] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 25.973376][ T241] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 25.973524][ T241] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 25.973668][ T241] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 25.973780][ T241] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 25.973956][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.974113][ T241] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.974267][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.974420][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.974567][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.974720][ 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) 
[ 25.974870][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.974995][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.975142][ T241] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.975294][ T241] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 25.975440][ T241] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 25.975603][ T241] ? release_sock (net/core/sock.c:3630) 
[ 25.975754][ T241] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 25.975897][ T241] ? release_sock (net/core/sock.c:3630) 
[ 25.976047][ T241] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.976194][ T241] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 25.976340][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.976487][ T241] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.976640][ T241] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.976793][ 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) 
[ 25.976941][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.977056][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.977213][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.977363][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.977509][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.977656][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.977806][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.977952][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.978099][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.978246][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.978394][ T241] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 25.978546][ T241] do_sock_getsockopt (net/socket.c:2396) 
[ 25.978694][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.978842][ T241] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 25.978997][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.979111][ T241] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 25.979263][ T241] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 25.979411][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.979564][ T241] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 25.979714][ T241] __x64_sys_getsockopt (net/socket.c:2432) 
[ 25.979859][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.980038][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.980186][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.980367][  T241] RIP: 0033:0x7f540c5ad46e
[ 25.980524][ 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
[   25.981032][  T241] RSP: 002b:00007f540bc58878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   25.981255][  T241] RAX: ffffffffffffffda RBX: 00007f540bc58b40 RCX: 00007f540c5ad46e
[   25.981471][  T241] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   25.981702][  T241] RBP: 00007f540bc58890 R08: 00007f540bc5888c R09: 0000000000000064
[   25.981922][  T241] R10: 00007f540bc58890 R11: 0000000000000246 R12: 000000000000000a
[   25.982140][  T241] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   25.984009][  T241] 1 lock held by key-management_/241:
| [ 25.984159][ T241] #0: ffff888005d99098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.984467][  T241]
| [   25.984467][  T241] stack backtrace:
[   25.984898][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.985223][  T241] Call Trace:
[   25.985335][  T241]  <TASK>
[ 25.985414][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.985573][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.985721][ T241] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 25.985872][ T241] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 25.986021][ T241] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 25.986167][ 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) 
[ 25.986346][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.986501][ T241] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.986644][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.986789][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.986930][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.987077][ T241] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 25.987228][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.987373][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.987516][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.987660][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.987809][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.987953][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.988101][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 25.988252][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.988409][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.988520][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.988669][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.988816][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.988967][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.989120][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.989263][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.989446][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.989594][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.989771][  T241] RIP: 0033:0x7f540c5ad91e
[ 25.989922][ 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
[   25.990429][  T241] RSP: 002b:00007f540bc58a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.990649][  T241] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007f540c5ad91e
[   25.991006][  T241] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   25.991229][  T241] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   25.991443][  T241] R10: 00007f540bc58a20 R11: 0000000000000246 R12: 000000000000000a
[   25.991750][  T241] R13: 0000000000000000 R14: 00007f540bc58b40 R15: 0000000000411c28
| [   25.995419][  T241] 1 lock held by key-management_/241:
| [ 25.995567][ T241] #0: ffff888005d99098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.995865][  T241]
| [   25.995865][  T241] stack backtrace:
[   25.996290][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.996605][  T241] Call Trace:
[   25.996714][  T241]  <TASK>
[ 25.996792][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.996938][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.997086][ T241] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 25.997232][ T241] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 25.997379][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.997535][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.997684][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.997832][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.997973][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.998123][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.998269][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.998411][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.998552][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.998700][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.998842][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.998993][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 25.999136][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.999286][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.999399][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.999544][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.999689][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.999839][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.999981][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 26.000161][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.000309][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.000486][  T241] RIP: 0033:0x7f540c5ad91e
[ 26.000635][ 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
[   26.001131][  T241] RSP: 002b:00007f540bc58a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   26.001349][  T241] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f540c5ad91e
[   26.001563][  T241] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   26.001778][  T241] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007f540bc58aa0
[   26.001991][  T241] R10: 00007f540bc58aa0 R11: 0000000000000246 R12: 00000000000000c8
[   26.002202][  T241] R13: 000000000000000a R14: 00000000000000c8 R15: 00007f540bc58b30
| [   26.028541][  T241] 1 lock held by key-management_/241:
| [ 26.028685][ T241] #0: ffff888005d99e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   26.028984][  T241]
| [   26.028984][  T241] stack backtrace:
[   26.029421][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.029741][  T241] Call Trace:
[   26.029853][  T241]  <TASK>
[ 26.029935][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 26.030090][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 26.030239][ T241] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 26.030392][ T241] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 26.030574][ T241] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 26.030761][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 26.030875][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 26.031027][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 26.031175][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 26.031319][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 26.031472][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 26.031622][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 26.031775][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 26.031924][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 26.032065][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 26.032209][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 26.032356][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 26.032499][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 26.032651][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 26.032770][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 26.032916][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 26.033059][ T241] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 26.033213][ T241] ? __pfx___sys_socket (net/socket.c:1712) 
[ 26.033354][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 26.033534][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 26.033676][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 26.033855][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.034006][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.034185][  T241] RIP: 0033:0x7f540c5ad91e
[ 26.034335][ 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
[   26.034830][  T241] RSP: 002b:00007f540bc58c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   26.035050][  T241] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007f540c5ad91e
[   26.035263][  T241] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   26.035476][  T241] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   26.035692][  T241] R10: 00007f540bc58c80 R11: 0000000000000206 R12: 0000000000000009
[   26.035904][  T241] R13: 0000000000000000 R14: 00007f540c4fd520 R15: 0000000000000000
| [   27.590387][  T241] 1 lock held by key-management_/241:
| [ 27.590607][ T241] #0: ffff888023b69e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   27.590962][  T241]
| [   27.590962][  T241] stack backtrace:
[   27.591493][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.591842][  T241] Call Trace:
[   27.591962][  T241]  <TASK>
[ 27.592047][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.592212][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.592376][ T241] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 27.592539][ T241] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 27.592698][ T241] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 27.592889][ 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) 
[ 27.593052][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.593177][ T241] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 27.593371][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.593564][ T241] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 27.593719][ 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)) 
[ 27.593845][ T241] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 27.594003][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.594156][ T241] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 27.594312][ T241] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 27.594505][ 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) 
[ 27.594664][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.594788][ T241] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 27.594942][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.595133][ T241] __release_sock (net/core/sock.c:3079) 
[ 27.595292][ T241] release_sock (net/core/sock.c:3633) 
[ 27.595446][ T241] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 27.595601][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 27.595757][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 27.595912][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 27.596040][ T241] ? __fget_files (fs/file.c:1009) 
[ 27.596204][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 27.596358][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.596516][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.596706][  T241] RIP: 0033:0x7f540c5ad40b
[ 27.596867][ 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
[   27.597401][  T241] RSP: 002b:00007f540bc58bb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   27.597632][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f540c5ad40b
[   27.597860][  T241] RDX: 000000000000001c RSI: 00007f540bc58c00 RDI: 0000000000000009
[   27.598091][  T241] RBP: 0000000000000009 R08: 0000000000000000 R09: 00000000ffffffff
[   27.598324][  T241] R10: 00007f540c465598 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