======================================
| [   29.813056][  T235] 1 lock held by setsockopt-clos/235:
| [ 29.813699][ T235] #0: ffff888004f39e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   29.814252][  T235]
| [   29.814252][  T235] stack backtrace:
[   29.815069][  T235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.815643][  T235] Call Trace:
[   29.815850][  T235]  <TASK>
[ 29.815998][ T235] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.816356][ T235] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.816624][ T235] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 29.816883][ T235] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.817163][ T235] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 29.817416][ T235] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 29.817587][ T235] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 29.817753][ T235] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 29.817922][ T235] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 29.818050][ T235] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 29.818253][ T235] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.818430][ T235] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 29.818599][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.818770][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.818935][ T235] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.819118][ T235] ? 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) 
[ 29.819283][ T235] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.819421][ T235] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.819584][ T235] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.819749][ T235] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 29.819924][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.820095][ T235] ? inode_update_timestamps (fs/inode.c:2649 fs/inode.c:2662 fs/inode.c:1997) 
[ 29.820263][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.820431][ T235] ? 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) 
[ 29.820596][ T235] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.820727][ T235] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 29.820893][ T235] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 29.821069][ T235] ? ktime_get_coarse_real_ts64 (./include/linux/seqlock.h:74 kernel/time/timekeeping.c:2390) 
[ 29.821291][ T235] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 29.821455][ T235] ? 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) 
[ 29.821620][ T235] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.821753][ T235] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.821930][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.822113][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.822274][ T235] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.822440][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.822600][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.822761][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.822926][ T235] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.823110][ T235] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.823376][ T235] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 29.823644][ T235] do_sock_getsockopt (net/socket.c:2396) 
[ 29.823915][ T235] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.824183][ T235] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 29.824458][ T235] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.824667][ T235] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 29.824938][ T235] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 29.825195][ T235] ? fput (./arch/x86/include/asm/atomic64_64.h:61 ./include/linux/atomic/atomic-arch-fallback.h:4404 ./include/linux/atomic/atomic-long.h:1571 ./include/linux/atomic/atomic-instrumented.h:4540 fs/file_table.c:482) 
[ 29.825342][ T235] ? ksys_write (./include/linux/file.h:69 ./include/linux/file.h:85 fs/read_write.c:739) 
[ 29.825504][ T235] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.825672][ T235] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 29.825839][ T235] __x64_sys_getsockopt (net/socket.c:2432) 
[ 29.826003][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.826216][ T235] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.826409][ T235] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.826616][  T235] RIP: 0033:0x7f3bf1e8846e
[ 29.826791][ T235] 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
[   29.827365][  T235] RSP: 002b:00007fffab07e1e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   29.827616][  T235] RAX: ffffffffffffffda RBX: 00007fffab07e380 RCX: 00007f3bf1e8846e
[   29.827861][  T235] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   29.828121][  T235] RBP: 00007fffab07e200 R08: 00007fffab07e1fc R09: 0000000000000064
[   29.828373][  T235] R10: 00007fffab07e200 R11: 0000000000000246 R12: 0000000000000009
[   29.828617][  T235] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   29.834646][  T235] 1 lock held by setsockopt-clos/235:
| [ 29.834813][ T235] #0: ffff888004f3c898 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.835206][  T235]
| [   29.835206][  T235] stack backtrace:
[   29.835783][  T235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.836145][  T235] Call Trace:
[   29.836283][  T235]  <TASK>
[ 29.836375][ T235] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.836552][ T235] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.836717][ T235] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 29.836886][ T235] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 29.837055][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.837243][ T235] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.837409][ T235] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.837576][ T235] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.837739][ T235] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.837906][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.838081][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.838237][ T235] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.838395][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.838556][ T235] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.838720][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.838883][ T235] do_sock_setsockopt (net/socket.c:2334) 
[ 29.839045][ T235] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.839232][ T235] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.839360][ T235] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.839524][ T235] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.839683][ T235] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.839853][ T235] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.840013][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.840227][ T235] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.840386][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.840591][ T235] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.840753][ T235] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.840956][  T235] RIP: 0033:0x7f3bf1e8891e
[ 29.841136][ T235] 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
[   29.841696][  T235] RSP: 002b:00007fffab07e4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   29.841949][  T235] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bf1e8891e
[   29.842195][  T235] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   29.842433][  T235] RBP: 0000000000000009 R08: 0000000000000450 R09: 0000000000000000
[   29.842675][  T235] R10: 00007fffab07e5a0 R11: 0000000000000246 R12: 0000000000000027
[   29.842920][  T235] R13: 0000000000000000 R14: 00007fffab07e5a0 R15: 000000000041069c
| [   29.915809][  T235] 1 lock held by setsockopt-clos/235:
| [ 29.915985][ T235] #0: ffff888006099098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.916362][  T235]
| [   29.916362][  T235] stack backtrace:
[   29.916910][  T235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.917289][  T235] Call Trace:
[   29.917425][  T235]  <TASK>
[ 29.917518][ T235] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.917701][ T235] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.917878][ T235] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 29.918054][ T235] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 29.918233][ T235] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 29.918405][ T235] ? 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) 
[ 29.918613][ T235] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.918804][ T235] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.918972][ T235] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.919146][ T235] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.919311][ T235] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.919493][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.919674][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.919847][ T235] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.920020][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.920188][ T235] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.920363][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.920540][ T235] do_sock_setsockopt (net/socket.c:2334) 
[ 29.920716][ T235] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.920888][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.921064][ T235] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.921196][ T235] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.921364][ T235] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.921534][ T235] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.921707][ T235] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.921872][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.922078][ T235] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.922241][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.922445][ T235] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.922615][ T235] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.922822][  T235] RIP: 0033:0x7f3bf1e8891e
[ 29.923009][ T235] 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
[   29.923598][  T235] RSP: 002b:00007fffab07e7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   29.923857][  T235] RAX: ffffffffffffffda RBX: 00000000000001b4 RCX: 00007f3bf1e8891e
[   29.924121][  T235] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 0000000000000009
[   29.924367][  T235] RBP: 0000000000000009 R08: 0000000000000120 R09: 0029383231736561
[   29.924613][  T235] R10: 00007fffab07e8e0 R11: 0000000000000206 R12: 0000000000001108
[   29.924856][  T235] R13: 0000000000000001 R14: 0100000000000000 R15: 00005402b80d0120
| [   30.434921][  T235] 1 lock held by setsockopt-clos/235:
| [ 30.435079][ T235] #0: ffff8880053f9098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   30.435400][  T235]
| [   30.435400][  T235] stack backtrace:
[   30.435875][  T235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.436213][  T235] Call Trace:
[   30.436373][  T235]  <TASK>
[ 30.436462][ T235] dump_stack_lvl (lib/dump_stack.c:123) 
[ 30.436628][ T235] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 30.436792][ T235] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 30.436953][ T235] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1860) 
[ 30.437111][ T235] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 30.437262][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.437430][ T235] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 30.437603][ T235] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 30.437762][ T235] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 30.437915][ T235] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 30.438075][ T235] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 30.438223][ T235] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 30.438370][ T235] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 30.438522][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 30.438668][ T235] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 30.438814][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.438968][ T235] do_sock_setsockopt (net/socket.c:2334) 
[ 30.439119][ T235] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 30.439275][ T235] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 30.439392][ T235] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 30.439540][ T235] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 30.439690][ T235] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 30.439844][ T235] ? __pfx___sys_socket (net/socket.c:1712) 
[ 30.439996][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.440189][ T235] __x64_sys_setsockopt (net/socket.c:2363) 
[ 30.440354][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 30.440547][ T235] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.440700][ T235] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.440887][  T235] RIP: 0033:0x7f3bf1e8891e
[ 30.441042][ T235] 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
[   30.441574][  T235] RSP: 002b:00007fffab07e668 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   30.441797][  T235] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bf1e8891e
[   30.442026][  T235] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   30.442249][  T235] RBP: 0000000000000009 R08: 0000000000000090 R09: 0000000000000002
[   30.442485][  T235] R10: 00007fffab07e720 R11: 0000000000000246 R12: 0000000000000027


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_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt
lockdep_rcu_suspicious:tcp_ao_established_key:tcp_ao_del_cmd:do_tcp_setsockopt:do_sock_setsockopt