======================================
| [   28.066554][  T241] 1 lock held by key-management_/241:
| [ 28.066707][ T241] #0: ffff888005862a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   28.067013][  T241]
| [   28.067013][  T241] stack backtrace:
[   28.067458][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.067780][  T241] Call Trace:
[   28.067896][  T241]  <TASK>
[ 28.067976][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.068129][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.068281][ T241] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 28.068433][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.068589][ T241] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 28.068771][ T241] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 28.068926][ T241] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 28.069076][ T241] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 28.069219][ T241] ? kasan_save_free_info (mm/kasan/generic.c:582) 
[ 28.069366][ T241] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 28.069511][ T241] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 28.069620][ T241] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 28.069801][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.069956][ T241] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 28.070101][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.070250][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.070426][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.070579][ 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) 
[ 28.070726][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.070874][ T241] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.071048][ T241] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.071213][ T241] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 28.071381][ T241] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 28.071561][ T241] ? release_sock (net/core/sock.c:3630) 
[ 28.071725][ T241] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 28.071871][ T241] ? release_sock (net/core/sock.c:3630) 
[ 28.072049][ T241] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 28.072195][ T241] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 28.072368][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.072520][ T241] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 28.072667][ T241] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 28.072813][ 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) 
[ 28.072960][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.073076][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.073235][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.073384][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.073531][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.073678][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.073827][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.073971][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.074125][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.074269][ T241] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.074419][ T241] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 28.074572][ T241] do_sock_getsockopt (net/socket.c:2396) 
[ 28.074717][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.074872][ T241] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 28.075028][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.075147][ T241] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 28.075311][ T241] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 28.075464][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 28.075642][ T241] __x64_sys_getsockopt (net/socket.c:2432) 
[ 28.075789][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.075980][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.076131][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.076312][  T241] RIP: 0033:0x7fac100c146e
[ 28.076468][ 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
[   28.076981][  T241] RSP: 002b:00007fac0f76c878 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   28.077203][  T241] RAX: ffffffffffffffda RBX: 00007fac0f76cb40 RCX: 00007fac100c146e
[   28.077419][  T241] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000a
[   28.077636][  T241] RBP: 00007fac0f76c890 R08: 00007fac0f76c88c R09: 0000000000000064
[   28.077856][  T241] R10: 00007fac0f76c890 R11: 0000000000000246 R12: 000000000000000a
[   28.078073][  T241] R13: 0000000000000064 R14: 0000000000000020 R15: 0000000000000064
| [   28.079845][  T241] 1 lock held by key-management_/241:
| [ 28.080002][ T241] #0: ffff888005862a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   28.080269][  T241]
| [   28.080269][  T241] stack backtrace:
[   28.080736][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.081067][  T241] Call Trace:
[   28.081183][  T241]  <TASK>
[ 28.081264][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.081417][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.081570][ T241] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 28.081721][ T241] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 28.081874][ T241] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 28.082032][ 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) 
[ 28.082189][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.082370][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.082526][ T241] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.082672][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.082826][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 28.082970][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.083124][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.083274][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.083416][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.083697][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.083844][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 28.083991][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.084154][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 28.084381][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 28.084536][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.084652][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 28.084805][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 28.084951][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 28.085195][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 28.085345][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.085534][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.085687][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.085959][  T241] RIP: 0033:0x7fac100c191e
[ 28.086112][ 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
[   28.086807][  T241] RSP: 002b:00007fac0f76ca08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   28.087031][  T241] RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 00007fac100c191e
[   28.087257][  T241] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 000000000000000a
[   28.087568][  T241] RBP: 00000000000000c8 R08: 0000000000000120 R09: 0029383231736561
[   28.087796][  T241] R10: 00007fac0f76ca20 R11: 0000000000000246 R12: 000000000000000a
[   28.088092][  T241] R13: 0000000000000000 R14: 00007fac0f76cb40 R15: 0000000000411c18
| [   28.097065][  T241] 1 lock held by key-management_/241:
| [ 28.097308][ T241] #0: ffff888005862a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   28.097793][  T241]
| [   28.097793][  T241] stack backtrace:
[   28.098527][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.099053][  T241] Call Trace:
[   28.099242][  T241]  <TASK>
[ 28.099377][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.099616][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.099868][ T241] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 28.100110][ T241] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 28.100364][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.100622][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.100889][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.101138][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 28.101380][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.101628][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.101879][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.102116][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.102369][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.102600][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 28.102841][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.103097][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 28.103343][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 28.103599][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.103788][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 28.104029][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 28.104269][ T241] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 28.104522][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 28.104760][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.105056][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.105307][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.105611][  T241] RIP: 0033:0x7fac100c191e
[ 28.105861][ 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
[   28.106661][  T241] RSP: 002b:00007fac0f76ca48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   28.106883][  T241] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fac100c191e
[   28.107103][  T241] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 000000000000000a
[   28.107331][  T241] RBP: 00000000ffffffff R08: 0000000000000090 R09: 00007fac0f76caa0
[   28.107549][  T241] R10: 00007fac0f76caa0 R11: 0000000000000246 R12: 00000000000000c8
[   28.107776][  T241] R13: 000000000000000a R14: 00000000000000c8 R15: 00007fac0f76cb30
| [   28.135214][  T241] 1 lock held by key-management_/241:
| [ 28.135365][ T241] #0: ffff888005863798 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   28.135666][  T241]
| [   28.135666][  T241] stack backtrace:
[   28.136112][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.136425][  T241] Call Trace:
[   28.136537][  T241]  <TASK>
[ 28.136617][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.136772][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.136927][ T241] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 28.137075][ T241] tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:2003) 
[ 28.137264][ T241] ? __pfx_tcp_ao_info_cmd.constprop.0 (net/ipv4/tcp_ao.c:1956) 
[ 28.137451][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.137573][ T241] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.137725][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.137886][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 28.138034][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.138198][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.138346][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.138494][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.138639][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.138784][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 28.138936][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.139086][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 28.139247][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 28.139409][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.139531][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 28.139683][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 28.139836][ T241] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 28.139988][ T241] ? __pfx___sys_socket (net/socket.c:1712) 
[ 28.140137][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.140328][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 28.140477][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.140673][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.140822][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.141003][  T241] RIP: 0033:0x7fac100c191e
[ 28.141158][ 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
[   28.141666][  T241] RSP: 002b:00007fac0f76cc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   28.141898][  T241] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007fac100c191e
[   28.142131][  T241] RDX: 0000000000000028 RSI: 0000000000000006 RDI: 0000000000000009
[   28.142411][  T241] RBP: 00000000000000c8 R08: 0000000000000030 R09: 00000000000000c8
[   28.142639][  T241] R10: 00007fac0f76cc80 R11: 0000000000000206 R12: 0000000000000009
[   28.142861][  T241] R13: 0000000000000000 R14: 00007fac10011520 R15: 0000000000000000
| [   29.542834][  T241] 1 lock held by key-management_/241:
| [ 29.542994][ T241] #0: ffff888005f73798 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   29.543280][  T241]
| [   29.543280][  T241] stack backtrace:
[   29.543760][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.544103][  T241] Call Trace:
[   29.544225][  T241]  <TASK>
[ 29.544311][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.544473][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.544630][ T241] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 29.544788][ T241] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 29.544947][ T241] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 29.545138][ 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) 
[ 29.545306][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.545430][ T241] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 29.545624][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.545826][ T241] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 29.545982][ 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)) 
[ 29.546105][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.546261][ T241] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 29.546421][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.546573][ T241] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 29.546732][ T241] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 29.546919][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.547055][ T241] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1945) 
[ 29.547217][ T241] __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 29.547387][ T241] release_sock (net/core/sock.c:3633) 
[ 29.547541][ T241] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 29.547702][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 29.547861][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 29.548014][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 29.548139][ T241] ? __pfx_do_fcntl (fs/fcntl.c:443) 
[ 29.548299][ T241] ? __fget_files (fs/file.c:1009) 
[ 29.548469][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 29.548622][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.548791][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.548980][  T241] RIP: 0033:0x7fac100c140b
[ 29.549147][ 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
[   29.549703][  T241] RSP: 002b:00007fac0f76cbc0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   29.549941][  T241] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fac100c140b
[   29.550179][  T241] RDX: 0000000000000010 RSI: 00007fac0f76cc10 RDI: 0000000000000009
[   29.550422][  T241] RBP: 0000000000000009 R08: 0000000000000000 R09: 00000000ffffffff
[   29.550661][  T241] R10: 00007fac0ff79598 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