======================================
| [   29.046313][  T236] 1 lock held by setsockopt-clos/236:
| [ 29.046645][ T236] #0: ffff888005de9e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   29.047285][  T236]
| [   29.047285][  T236] stack backtrace:
[   29.048092][  T236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.048662][  T236] Call Trace:
[   29.048871][  T236]  <TASK>
[ 29.049014][ T236] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.049293][ T236] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.049563][ T236] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 29.049832][ T236] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.050113][ T236] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 29.050445][ T236] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 29.050717][ T236] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 29.050980][ T236] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 29.051236][ T236] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 29.051438][ T236] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 29.051758][ T236] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.052048][ T236] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 29.052314][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.052585][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.052845][ T236] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.053120][ T236] ? 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) 
[ 29.053381][ T236] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.053612][ T236] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.053874][ T236] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 29.054139][ T236] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 29.054428][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.054682][ T236] ? inode_update_timestamps (fs/inode.c:2649 fs/inode.c:2662 fs/inode.c:1997) 
[ 29.054914][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.055075][ T236] ? 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) 
[ 29.055248][ T236] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.055374][ T236] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 29.055538][ T236] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 29.055720][ T236] ? ktime_get_coarse_real_ts64 (./include/linux/seqlock.h:74 kernel/time/timekeeping.c:2390) 
[ 29.055929][ T236] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 29.056087][ T236] ? 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) 
[ 29.056246][ T236] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 29.056371][ T236] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.056547][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.056734][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.056893][ T236] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.057055][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.057214][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.057375][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.057538][ T236] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.057709][ T236] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 29.057872][ T236] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 29.058046][ T236] do_sock_getsockopt (net/socket.c:2396) 
[ 29.058211][ T236] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.058374][ T236] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 29.058544][ T236] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.058684][ T236] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 29.058849][ T236] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 29.059010][ T236] ? 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) 
[ 29.059134][ T236] ? ksys_write (./include/linux/file.h:69 ./include/linux/file.h:85 fs/read_write.c:739) 
[ 29.059296][ T236] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.059465][ T236] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 29.059641][ T236] __x64_sys_getsockopt (net/socket.c:2432) 
[ 29.059800][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.059994][ T236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.060158][ T236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.060355][  T236] RIP: 0033:0x7fc35a7a246e
[ 29.060524][ T236] 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
[   29.061096][  T236] RSP: 002b:00007ffdb418c398 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   29.061337][  T236] RAX: ffffffffffffffda RBX: 00007ffdb418c530 RCX: 00007fc35a7a246e
[   29.061583][  T236] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   29.061964][  T236] RBP: 00007ffdb418c3b0 R08: 00007ffdb418c3ac R09: 0000000000000064
[   29.062258][  T236] R10: 00007ffdb418c3b0 R11: 0000000000000246 R12: 0000000000000009
[   29.062499][  T236] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   29.066313][  T236] 1 lock held by setsockopt-clos/236:
| [ 29.066482][ T236] #0: ffff888005dec898 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.066821][  T236]
| [   29.066821][  T236] stack backtrace:
[   29.067326][  T236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.067680][  T236] Call Trace:
[   29.067792][  T236]  <TASK>
[ 29.067870][ T236] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.068018][ T236] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.068169][ T236] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 29.068320][ T236] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 29.068474][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.068648][ T236] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.068800][ T236] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.068949][ T236] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.069097][ T236] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.069253][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.069400][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.069541][ T236] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.069760][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.069996][ T236] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.070214][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.070370][ T236] do_sock_setsockopt (net/socket.c:2334) 
[ 29.070523][ T236] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.070678][ T236] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.070793][ T236] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.070940][ T236] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.071085][ T236] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.071235][ T236] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.071385][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.071568][ T236] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.071720][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.071903][ T236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.072052][ T236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.072237][  T236] RIP: 0033:0x7fc35a7a291e
[ 29.072399][ T236] 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
[   29.072945][  T236] RSP: 002b:00007ffdb418c668 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   29.073168][  T236] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc35a7a291e
[   29.073397][  T236] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   29.073632][  T236] RBP: 0000000000000009 R08: 0000000000000450 R09: 0000000000000000
[   29.073848][  T236] R10: 00007ffdb418c750 R11: 0000000000000246 R12: 0000000000000027
[   29.074068][  T236] R13: 0000000000000000 R14: 00007ffdb418c750 R15: 000000000041069c
| [   29.115032][  T236] 1 lock held by setsockopt-clos/236:
| [ 29.115283][ T236] #0: ffff8880060c9098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.115861][  T236]
| [   29.115861][  T236] stack backtrace:
[   29.116658][  T236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.117256][  T236] Call Trace:
[   29.117455][  T236]  <TASK>
[ 29.117603][ T236] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.117866][ T236] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.118150][ T236] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 29.118413][ T236] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 29.118690][ T236] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 29.118950][ T236] ? 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) 
[ 29.119276][ T236] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.119556][ T236] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.119803][ T236] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.120073][ T236] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.120333][ T236] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.120607][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.120872][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.121141][ T236] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.121398][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.121676][ T236] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.121932][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.122193][ T236] do_sock_setsockopt (net/socket.c:2334) 
[ 29.122451][ T236] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.122758][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.123023][ T236] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.123233][ T236] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.123520][ T236] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.123783][ T236] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.124056][ T236] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.124321][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.124657][ T236] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.124940][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.125255][ T236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.125529][ T236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.125870][  T236] RIP: 0033:0x7fc35a7a291e
[ 29.126145][ T236] 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
[   29.127013][  T236] RSP: 002b:00007ffdb418c958 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   29.127410][  T236] RAX: ffffffffffffffda RBX: 00000000000001b4 RCX: 00007fc35a7a291e
[   29.127847][  T236] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 0000000000000009
[   29.128224][  T236] RBP: 0000000000000009 R08: 0000000000000120 R09: 0029383231736561
[   29.128593][  T236] R10: 00007ffdb418ca90 R11: 0000000000000206 R12: 0000000000001108
[   29.128977][  T236] R13: 0000000000000001 R14: 0100000000000000 R15: 00005402b80d0120
| [   29.680534][  T236] 1 lock held by setsockopt-clos/236:
| [ 29.680706][ T236] #0: ffff8880079d1098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   29.681056][  T236]
| [   29.681056][  T236] stack backtrace:
[   29.681573][  T236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.681942][  T236] Call Trace:
[   29.682068][  T236]  <TASK>
[ 29.682154][ T236] dump_stack_lvl (lib/dump_stack.c:123) 
[ 29.682325][ T236] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 29.682506][ T236] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 29.682673][ T236] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1860) 
[ 29.682849][ T236] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 29.683028][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.683225][ T236] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 29.683431][ T236] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 29.683596][ T236] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 29.683758][ T236] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 29.683932][ T236] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 29.684097][ T236] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 29.684293][ T236] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 29.684461][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 29.684634][ T236] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 29.684792][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 29.684957][ T236] do_sock_setsockopt (net/socket.c:2334) 
[ 29.685122][ T236] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 29.685303][ T236] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 29.685431][ T236] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 29.685603][ T236] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 29.685783][ T236] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 29.685946][ T236] ? __pfx___sys_socket (net/socket.c:1712) 
[ 29.686134][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.686344][ T236] __x64_sys_setsockopt (net/socket.c:2363) 
[ 29.686513][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 29.686716][ T236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.686879][ T236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.687080][  T236] RIP: 0033:0x7fc35a7a291e
[ 29.687248][ T236] 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
[   29.687811][  T236] RSP: 002b:00007ffdb418c818 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   29.688055][  T236] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc35a7a291e
[   29.688297][  T236] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   29.688556][  T236] RBP: 0000000000000009 R08: 0000000000000090 R09: 0000000000000002
[   29.688804][  T236] R10: 00007ffdb418c8d0 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