======================================
| [   25.158432][  T240] 1 lock held by key-management_/240:
| [ 25.158590][ T240] #0: ffff888007951098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   25.158903][  T240]
| [   25.158903][  T240] stack backtrace:
[   25.159357][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.159683][  T240] Call Trace:
[   25.159799][  T240]  <TASK>
[ 25.159883][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.160038][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.160189][ T240] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 25.160336][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.160490][ T240] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 25.160679][ T240] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 25.160831][ T240] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 25.160976][ T240] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 25.161121][ T240] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 25.161235][ T240] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 25.161409][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.161564][ T240] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.161716][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.161830][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.161979][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.162177][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.162324][ T240] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.162471][ T240] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 25.162619][ T240] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 25.162781][ T240] ? release_sock (net/core/sock.c:3630) 
[ 25.162925][ T240] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 25.163069][ T240] ? release_sock (net/core/sock.c:3630) 
[ 25.163222][ T240] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.163370][ T240] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 25.163514][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.163661][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.163810][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.163961][ T240] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.164105][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.164221][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.164376][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.164526][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.164670][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.164817][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.164960][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.165108][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.165258][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.165403][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.165551][ T240] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 25.165704][ T240] do_sock_getsockopt (net/socket.c:2396) 
[ 25.165852][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.165998][ T240] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 25.166150][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.166267][ T240] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 25.166417][ T240] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 25.166567][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.166715][ T240] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 25.166865][ T240] __x64_sys_getsockopt (net/socket.c:2432) 
[ 25.167010][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.167190][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.167337][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.167518][  T240] RIP: 0033:0x7f1c3d02c46e
[ 25.167680][ T240] Code: 1f 44 00 00 48 8b 15 91 99 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb b8 0f 1f 44 00 00 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 59
All code
========
   0:	1f                   	(bad)
   1:	44 00 00             	add    %r8b,(%rax)
   4:	48 8b 15 91 99 0a 00 	mov    0xa9991(%rip),%rdx        # 0xa999c
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
  15:	eb b8                	jmp    0xffffffffffffffcf
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 37 00 00 00       	mov    $0x37,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	59                   	pop    %rcx

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	59                   	pop    %rcx
[   25.168180][  T240] RSP: 002b:00007f1c37ffe878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   25.168403][  T240] RAX: ffffffffffffffda RBX: 00007f1c37ffeb40 RCX: 00007f1c3d02c46e
[   25.168623][  T240] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   25.168843][  T240] RBP: 00007f1c37ffe890 R08: 00007f1c37ffe88c R09: 0000000000000064
[   25.169058][  T240] R10: 00007f1c37ffe890 R11: 0000000000000246 R12: 000000000000000a
[   25.169276][  T240] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   25.171067][  T240] 1 lock held by key-management_/240:
| [ 25.171218][ T240] #0: ffff888007951098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.171526][  T240]
| [   25.171526][  T240] stack backtrace:
[   25.172094][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.172426][  T240] Call Trace:
[   25.172544][  T240]  <TASK>
[ 25.172625][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.172779][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.172933][ T240] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 25.173092][ T240] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 25.173247][ T240] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 25.173399][ T240] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.173584][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.173741][ T240] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.173887][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.174035][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.174179][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.174336][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.174484][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.174629][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.174776][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.174920][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.175068][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.175211][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.175357][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 25.175506][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.175660][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.175846][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.175965][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.176115][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.176267][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.176425][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.176567][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.176746][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.176897][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.177079][  T240] RIP: 0033:0x7f1c3d02c91e
[ 25.177231][ 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
[   25.177946][  T240] RSP: 002b:00007f1c37ffea08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.178164][  T240] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007f1c3d02c91e
[   25.178385][  T240] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   25.178607][  T240] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   25.178821][  T240] R10: 00007f1c37ffea20 R11: 0000000000000246 R12: 000000000000000a
[   25.179038][  T240] R13: 0000000000000000 R14: 00007f1c37ffeb40 R15: 0000000000411c28
| [   25.187370][  T240] 1 lock held by key-management_/240:
| [ 25.187542][ T240] #0: ffff888007951098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.187888][  T240]
| [   25.187888][  T240] stack backtrace:
[   25.188364][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.188716][  T240] Call Trace:
[   25.188840][  T240]  <TASK>
[ 25.188927][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.189094][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.189267][ T240] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 25.189439][ T240] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 25.189606][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.189781][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.189949][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.190115][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.190278][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.190451][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.190617][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.190775][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.190942][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.191100][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.191261][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.191437][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 25.191598][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.191802][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.191938][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.192100][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.192284][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.192454][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.192630][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.192838][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.193001][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.193224][  T240] RIP: 0033:0x7f1c3d02c91e
[ 25.193397][ 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
[   25.193992][  T240] RSP: 002b:00007f1c37ffea28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.194249][  T240] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f1c3d02c91e
[   25.194509][  T240] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   25.194754][  T240] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007f1c37ffeaa0
[   25.195020][  T240] R10: 00007f1c37ffeaa0 R11: 0000000000000246 R12: 00000000000000c8
[   25.195277][  T240] R13: 000000000000000a R14: 00000000000000c8 R15: 00007f1c37ffeb30
| [   25.231239][  T240] 1 lock held by key-management_/240:
| [ 25.231424][ T240] #0: ffff888007951e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.231798][  T240]
| [   25.231798][  T240] stack backtrace:
[   25.232324][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.232697][  T240] Call Trace:
[   25.232823][  T240]  <TASK>
[ 25.232909][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.233086][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.233269][ T240] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 25.233437][ T240] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 25.233662][ T240] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 25.233869][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.234009][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.234175][ T240] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.234342][ T240] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.234502][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.234674][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.234839][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.234998][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.235158][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.235323][ T240] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.235484][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.235652][ T240] do_sock_setsockopt (net/socket.c:2334) 
[ 25.235818][ T240] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.235985][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.236111][ T240] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.236272][ T240] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.236430][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406) 
[ 25.236634][ T240] ? __local_bh_enable (kernel/softirq.c:343) 
[ 25.236803][ T240] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.236962][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.237160][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.237322][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.237522][  T240] RIP: 0033:0x7f1c3d02c91e
[ 25.237691][ 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
[   25.238253][  T240] RSP: 002b:00007f1c37ffec68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   25.238495][  T240] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007f1c3d02c91e
[   25.238734][  T240] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   25.238975][  T240] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   25.239218][  T240] R10: 00007f1c37ffec80 R11: 0000000000000206 R12: 0000000000000009
[   25.239466][  T240] R13: 0000000000000000 R14: 00007f1c3cf7c520 R15: 0000000000000000
| [   27.030735][  T240] 1 lock held by key-management_/240:
| [ 27.030891][ T240] #0: ffff8880060f9e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   27.031179][  T240]
| [   27.031179][  T240] stack backtrace:
[   27.031646][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.031989][  T240] Call Trace:
[   27.032110][  T240]  <TASK>
[ 27.032199][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.032360][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.032521][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 27.032681][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 27.032838][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 27.033029][ 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) 
[ 27.033186][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.033309][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 27.033497][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.033689][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 27.033843][ 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)) 
[ 27.033968][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 27.034123][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.034286][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 27.034444][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 27.034634][ 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) 
[ 27.034785][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.034905][ T240] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 27.035056][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.035249][ T240] __release_sock (net/core/sock.c:3079) 
[ 27.035410][ T240] release_sock (net/core/sock.c:3633) 
[ 27.035563][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 27.035717][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 27.035870][ T240] ? __pfx___sys_connect (net/socket.c:2078) 
[ 27.036020][ T240] ? do_fcntl (fs/fcntl.c:473) 
[ 27.036145][ T240] ? __fget_files (fs/file.c:1009) 
[ 27.036311][ T240] __x64_sys_connect (net/socket.c:2095) 
[ 27.036464][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.036630][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.036829][  T240] RIP: 0033:0x7f1c3d02c40b
[ 27.036994][ 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
[   27.037518][  T240] RSP: 002b:00007f1c37ffebb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   27.037751][  T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f1c3d02c40b
[   27.037982][  T240] RDX: 000000000000001c RSI: 00007f1c37ffec00 RDI: 0000000000000009
[   27.038207][  T240] RBP: 0000000000000009 R08: 0000000000000000 R09: 00000000ffffffff
[   27.038432][  T240] R10: 00007f1c3cee4598 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