======================================
| [   28.209306][  T233] 1 lock held by bench-lookups_i/233:
| [ 28.209482][ T233] #0: ffff888004971098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   28.209846][  T233]
| [   28.209846][  T233] stack backtrace:
[   28.210345][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.210706][  T233] Call Trace:
[   28.210838][  T233]  <TASK>
[ 28.210929][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.211111][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.211286][ T233] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 28.211460][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.211636][ T233] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 28.211846][ T233] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 28.212024][ T233] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 28.212193][ T233] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 28.212357][ T233] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 28.212491][ T233] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 28.212704][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.212886][ T233] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 28.213067][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.213239][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.213403][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.213574][ T233] ? 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) 
[ 28.213739][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.213876][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.214050][ T233] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 28.214220][ T233] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 28.214389][ T233] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 28.214582][ T233] ? release_sock (net/core/sock.c:3630) 
[ 28.214750][ T233] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 28.214916][ T233] ? release_sock (net/core/sock.c:3630) 
[ 28.215092][ T233] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 28.215265][ T233] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 28.215434][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.215602][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.215770][ T233] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 28.215936][ T233] ? 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) 
[ 28.216101][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.216232][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.216418][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.216593][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.216756][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.216928][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.217097][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.217272][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.217457][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.217617][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 28.217789][ T233] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 28.217966][ T233] do_sock_getsockopt (net/socket.c:2396) 
[ 28.218139][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.218309][ T233] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 28.218484][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.218616][ T233] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 28.218793][ T233] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 28.218964][ T233] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 28.219151][ T233] __x64_sys_getsockopt (net/socket.c:2432) 
[ 28.219328][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.219542][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.219716][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.219923][  T233] RIP: 0033:0x7fb561dd046e
[ 28.220104][ T233] 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
[   28.220681][  T233] RSP: 002b:00007ffe7cf6f088 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   28.220937][  T233] RAX: ffffffffffffffda RBX: 00007ffe7cf6f340 RCX: 00007fb561dd046e
[   28.221190][  T233] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   28.221437][  T233] RBP: 00007ffe7cf6f0a0 R08: 00007ffe7cf6f09c R09: 0000000000000064
[   28.221691][  T233] R10: 00007ffe7cf6f0a0 R11: 0000000000000246 R12: 0000000000000009
[   28.221943][  T233] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   28.224315][  T233] 1 lock held by bench-lookups_i/233:
| [ 28.224481][ T233] #0: ffff888004971098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   28.224844][  T233]
| [   28.224844][  T233] stack backtrace:
[   28.225357][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.225723][  T233] Call Trace:
[   28.225850][  T233]  <TASK>
[ 28.225944][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.226123][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.226297][ T233] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 28.226468][ T233] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 28.226643][ T233] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 28.226819][ T233] ? 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) 
[ 28.227023][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 28.227197][ T233] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.227361][ T233] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 28.227542][ T233] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 28.227708][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 28.227886][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 28.228065][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.228232][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 28.228399][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 28.228564][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 28.228728][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 28.228902][ T233] do_sock_setsockopt (net/socket.c:2334) 
[ 28.229075][ T233] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 28.229248][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 28.229384][ T233] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 28.229556][ T233] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 28.229725][ T233] ? __pfx_task_work_run (kernel/task_work.c:207) 
[ 28.229900][ T233] __x64_sys_setsockopt (net/socket.c:2363) 
[ 28.230077][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.230287][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.230455][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.230656][  T233] RIP: 0033:0x7fb561dd091e
[ 28.230834][ T233] 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
[   28.231419][  T233] RSP: 002b:00007ffe7cf6f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   28.231669][  T233] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb561dd091e
[   28.231926][  T233] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 0000000000000009
[   28.232178][  T233] RBP: 0000000000000009 R08: 0000000000000120 R09: 0029383231736561
[   28.232431][  T233] R10: 00007ffe7cf6f220 R11: 0000000000000246 R12: 00007ffe7cf6f340
[   28.232679][  T233] R13: 0000000000414380 R14: 0000000000000200 R15: 00000000396ff1a0
| [   28.451649][  T240] 1 lock held by bench-lookups_i/240:
| [ 28.451801][ T240] #0: ffff888004970298 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   28.452116][  T240]
| [   28.452116][  T240] stack backtrace:
[   28.452577][  T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.452915][  T240] Call Trace:
[   28.453036][  T240]  <TASK>
[ 28.453118][ T240] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.453279][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 28.453439][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 28.453601][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 28.453762][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 28.453958][ 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) 
[ 28.454118][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.454243][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 28.454435][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.454628][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 28.454786][ 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)) 
[ 28.454912][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 28.455072][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 28.455224][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 28.455380][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 28.455572][ 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) 
[ 28.455724][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 28.455847][ T240] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 28.456015][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 28.456208][ T240] __release_sock (net/core/sock.c:3079) 
[ 28.456367][ T240] release_sock (net/core/sock.c:3633) 
[ 28.456518][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 28.456672][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 28.456826][ T240] ? __pfx___sys_connect (net/socket.c:2078) 
[ 28.456979][ T240] ? do_fcntl (fs/fcntl.c:473) 
[ 28.457101][ T240] ? __fget_files (fs/file.c:1009) 
[ 28.457266][ T240] __x64_sys_connect (net/socket.c:2095) 
[ 28.457427][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 28.457588][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   28.457778][  T240] RIP: 0033:0x7fb561dd040b
[ 28.457942][ 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
[   28.458474][  T240] RSP: 002b:00007fb56147ccd0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   28.458704][  T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fb561dd040b
[   28.458933][  T240] RDX: 000000000000001c RSI: 00007fb56147cd20 RDI: 000000000000000a
[   28.459162][  T240] RBP: 000000000000000a R08: 0000000000000000 R09: 00007fb561f6b080
[   28.459387][  T240] R10: 00007fb561c88598 R11: 0000000000000293 R12: 000000000040dab0
[   28.459614][  T240] R13: 0000000000000005 R14: 00007fb56147cd20 R15: 00000000004143f8
| [   30.296588][  T233] 1 lock held by bench-lookups_i/233:
| [ 30.296758][ T233] #0: ffff888004971098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   30.297139][  T233]
| [   30.297139][  T233] stack backtrace:
[   30.297678][  T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.298045][  T233] Call Trace:
[   30.298171][  T233]  <TASK>
[ 30.298274][ T233] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.298449][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.298616][ T233] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 30.298807][ T233] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 30.298989][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.299184][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 30.299362][ T233] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 30.299535][ T233] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 30.299700][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.299891][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.300087][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.300271][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 30.300476][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 30.300644][ T233] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 30.300839][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.301018][ T233] do_sock_setsockopt (net/socket.c:2334) 
[ 30.301182][ T233] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 30.301350][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 30.301486][ T233] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 30.301658][ T233] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 30.301814][ T233] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 30.302030][ T233] ? trace_rcu_segcb_stats (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:570 ./include/linux/cpumask.h:1117 ./include/trace/events/rcu.h:537) 
[ 30.302193][ T233] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 30.302423][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.302638][ T233] __x64_sys_setsockopt (net/socket.c:2363) 
[ 30.302800][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.303010][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.303193][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.303403][  T233] RIP: 0033:0x7fb561dd091e
[ 30.303571][ T233] 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
[   30.304150][  T233] RSP: 002b:00007ffe7cf6f338 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   30.304391][  T233] RAX: ffffffffffffffda RBX: 0000000000414380 RCX: 00007fb561dd091e
[   30.304633][  T233] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   30.304877][  T233] RBP: 0000000000402dd0 R08: 0000000000000090 R09: 00007fb561f6b080
[   30.305123][  T233] R10: 00007ffe7cf6f3b0 R11: 0000000000000202 R12: 0000000000000009


Finger prints:
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
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