======================================
| [   25.811313][  T239] 1 lock held by key-management_/239:
| [ 25.811484][ T239] #0: ffff888006332a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   25.811790][  T239]
| [   25.811790][  T239] stack backtrace:
[   25.812277][  T239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.812629][  T239] Call Trace:
[   25.812781][  T239]  <TASK>
[ 25.812868][ T239] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.813037][ T239] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.813203][ T239] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 25.813365][ T239] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.813536][ T239] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 25.813735][ T239] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 25.813907][ T239] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 25.814068][ T239] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 25.814233][ T239] ? kasan_save_free_info (mm/kasan/generic.c:582) 
[ 25.814399][ T239] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 25.814556][ T239] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 25.814681][ T239] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 25.814874][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.815047][ T239] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.815209][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.815371][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.815529][ T239] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.815693][ T239] ? 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) 
[ 25.815857][ T239] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.815988][ T239] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.816151][ T239] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.816315][ T239] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 25.816472][ T239] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 25.816650][ T239] ? release_sock (net/core/sock.c:3630) 
[ 25.816813][ T239] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 25.816973][ T239] ? release_sock (net/core/sock.c:3630) 
[ 25.817134][ T239] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.817298][ T239] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 25.817461][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.817625][ T239] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.817790][ T239] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.817952][ T239] ? 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) 
[ 25.818113][ T239] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.818240][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.818409][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.818580][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.818738][ T239] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.818902][ T239] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.819062][ T239] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.819224][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.819388][ T239] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.819545][ T239] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.819704][ T239] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 25.819870][ T239] do_sock_getsockopt (net/socket.c:2396) 
[ 25.820033][ T239] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.820192][ T239] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 25.820366][ T239] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.820492][ T239] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 25.820656][ T239] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 25.820818][ T239] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.820985][ T239] __x64_sys_getsockopt (net/socket.c:2432) 
[ 25.821142][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.821338][ T239] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.821505][ T239] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.821702][  T239] RIP: 0033:0x7fee3294346e
[ 25.821872][ T239] 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
[   25.822442][  T239] RSP: 002b:00007fee31fee878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   25.822686][  T239] RAX: ffffffffffffffda RBX: 00007fee31feeb40 RCX: 00007fee3294346e
[   25.822932][  T239] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   25.823174][  T239] RBP: 00007fee31fee890 R08: 00007fee31fee88c R09: 0000000000000064
[   25.823411][  T239] R10: 00007fee31fee890 R11: 0000000000000246 R12: 000000000000000a
[   25.823652][  T239] R13: 0000000000000064 R14: 0000000000000020 R15: 0000000000000064
| [   25.826536][  T239] 1 lock held by key-management_/239:
| [ 25.826699][ T239] #0: ffff888006332a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.826995][  T239]
| [   25.826995][  T239] stack backtrace:
[   25.827562][  T239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.827912][  T239] Call Trace:
[   25.828035][  T239]  <TASK>
[ 25.828123][ T239] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.828289][ T239] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.828451][ T239] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 25.828614][ T239] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 25.828784][ T239] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 25.828946][ T239] ? 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) 
[ 25.829118][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.829304][ T239] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.829471][ T239] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.829633][ T239] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.829800][ T239] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.829957][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.830128][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.830293][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.830452][ T239] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.830615][ T239] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.830817][ T239] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.830978][ T239] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.831134][ T239] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.831298][ T239] do_sock_setsockopt (net/socket.c:2334) 
[ 25.831460][ T239] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.831623][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.831822][ T239] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.831948][ T239] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.832117][ T239] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.832276][ T239] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.832444][ T239] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.832602][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.832807][ T239] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.832975][ T239] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.833178][  T239] RIP: 0033:0x7fee3294391e
[ 25.833347][ T239] 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
[   25.833900][  T239] RSP: 002b:00007fee31feea08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.834298][  T239] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007fee3294391e
[   25.834534][  T239] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   25.834769][  T239] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   25.835004][  T239] R10: 00007fee31feea20 R11: 0000000000000246 R12: 000000000000000a
[   25.835247][  T239] R13: 0000000000000000 R14: 00007fee31feeb40 R15: 0000000000411c18
| [   25.843109][  T239] 1 lock held by key-management_/239:
| [ 25.843269][ T239] #0: ffff888006332a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.843556][  T239]
| [   25.843556][  T239] stack backtrace:
[   25.844030][  T239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.844385][  T239] Call Trace:
[   25.844514][  T239]  <TASK>
[ 25.844605][ T239] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.844771][ T239] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.844935][ T239] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 25.845102][ T239] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 25.845266][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.845443][ T239] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.845608][ T239] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.845777][ T239] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.845935][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.846108][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.846268][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.846426][ T239] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.846583][ T239] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.846748][ T239] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.846905][ T239] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.847069][ T239] do_sock_setsockopt (net/socket.c:2334) 
[ 25.847230][ T239] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.847395][ T239] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.847521][ T239] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.847684][ T239] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.847850][ T239] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 25.848019][ T239] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.848178][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.848375][ T239] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.848535][ T239] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.848730][  T239] RIP: 0033:0x7fee3294391e
[ 25.848894][ T239] 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
[   25.849448][  T239] RSP: 002b:00007fee31feea48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.849692][  T239] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fee3294391e
[   25.849929][  T239] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   25.850165][  T239] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007fee31feeaa0
[   25.850408][  T239] R10: 00007fee31feeaa0 R11: 0000000000000246 R12: 00000000000000c8
[   25.850643][  T239] R13: 000000000000000a R14: 00000000000000c8 R15: 00007fee31feeb30
| [   25.876646][  T239] 1 lock held by key-management_/239:
| [ 25.876808][ T239] #0: ffff888006333798 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.877118][  T239]
| [   25.877118][  T239] stack backtrace:
[   25.877602][  T239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.877958][  T239] Call Trace:
[   25.878084][  T239]  <TASK>
[ 25.878169][ T239] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.878342][ T239] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.878507][ T239] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 25.878676][ T239] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 25.878878][ T239] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 25.879084][ T239] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.879206][ T239] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.879373][ T239] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.879533][ T239] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.879695][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.879865][ T239] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.880031][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.880189][ T239] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.880354][ T239] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.880512][ T239] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.880670][ T239] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.880833][ T239] do_sock_setsockopt (net/socket.c:2334) 
[ 25.880993][ T239] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.881169][ T239] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.881298][ T239] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.881459][ T239] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.881616][ T239] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 25.881778][ T239] ? __pfx___sys_socket (net/socket.c:1712) 
[ 25.881937][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.882159][ T239] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.882334][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.882535][ T239] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.882697][ T239] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.882898][  T239] RIP: 0033:0x7fee3294391e
[ 25.883070][ T239] 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
[   25.883637][  T239] RSP: 002b:00007fee31feec68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   25.883875][  T239] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007fee3294391e
[   25.884112][  T239] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   25.884357][  T239] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   25.884595][  T239] R10: 00007fee31feec80 R11: 0000000000000206 R12: 0000000000000009
[   25.884837][  T239] R13: 0000000000000000 R14: 00007fee32893520 R15: 0000000000000000
| [   27.023414][  T239] 1 lock held by key-management_/239:
| [ 27.023567][ T239] #0: ffff888007aeb798 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   27.023853][  T239]
| [   27.023853][  T239] stack backtrace:
[   27.024310][  T239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.024641][  T239] Call Trace:
[   27.024757][  T239]  <TASK>
[ 27.024839][ T239] dump_stack_lvl (lib/dump_stack.c:123) 
[ 27.024998][ T239] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 27.025158][ T239] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 27.025318][ T239] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 27.025482][ T239] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 27.025669][ T239] ? 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) 
[ 27.025830][ T239] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.025952][ T239] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 27.026146][ T239] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 27.026338][ T239] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 27.026491][ T239] ? 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)) 
[ 27.026609][ T239] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 27.026764][ T239] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 27.026921][ T239] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 27.027072][ T239] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 27.027228][ T239] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 27.027417][ T239] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 27.027546][ T239] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1945) 
[ 27.027702][ T239] __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 27.027859][ T239] release_sock (net/core/sock.c:3633) 
[ 27.028012][ T239] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 27.028167][ T239] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 27.028321][ T239] ? __pfx___sys_connect (net/socket.c:2078) 
[ 27.028469][ T239] ? do_fcntl (fs/fcntl.c:473) 
[ 27.028586][ T239] ? __pfx_do_fcntl (fs/fcntl.c:443) 
[ 27.028743][ T239] ? __fget_files (fs/file.c:1009) 
[ 27.028914][ T239] __x64_sys_connect (net/socket.c:2095) 
[ 27.029070][ T239] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.029233][ T239] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.029423][  T239] RIP: 0033:0x7fee3294340b
[ 27.029584][ T239] 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
[   27.030117][  T239] RSP: 002b:00007fee31feebc0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   27.030351][  T239] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fee3294340b
[   27.030577][  T239] RDX: 0000000000000010 RSI: 00007fee31feec10 RDI: 0000000000000009
[   27.030811][  T239] RBP: 0000000000000009 R08: 0000000000000000 R09: 00000000ffffffff
[   27.031042][  T239] R10: 00007fee327fb598 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