======================================
| [   55.075402][ T1020] RCU nest depth: 0, expected: 0
| [   55.075562][ T1020] 2 locks held by tc/1020:
| [ 55.075725][ T1020] #0: ffffffffade09c08 (rtnl_mutex){+.+.}-{4:4}, at: tc_new_tfilter (net/sched/cls_api.c:2261)
| [ 55.076316][ T1020] #1: ffff88800af7c090 (&tp->lock){+.+.}-{3:3}, at: tc_new_tfilter (net/sched/cls_api.c:2383)
[   55.076859][ T1020] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   55.077057][ T1020] Call Trace:
[   55.077179][ T1020]  <TASK>
[ 55.077263][ T1020] dump_stack_lvl (lib/dump_stack.c:123)
[ 55.077427][ T1020] __might_resched (kernel/sched/core.c:8759)
[ 55.077586][ T1020] ? tc_new_tfilter (net/sched/cls_api.c:2383)
[ 55.077750][ T1020] cpus_read_lock (./include/linux/kernel.h:73 ./include/linux/percpu-rwsem.h:49 kernel/cpu.c:490)
[ 55.077906][ T1020] static_key_slow_inc (kernel/jump_label.c:191)
[ 55.078061][ T1020] tc_new_tfilter (net/sched/cls_api.c:2385)
[ 55.078228][ T1020] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 55.078351][ T1020] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186)
[ 55.078531][ T1020] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 55.078694][ T1020] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6912)
[ 55.078857][ T1020] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186)
[ 55.079015][ T1020] rtnetlink_rcv_msg (net/core/rtnetlink.c:6914)
[ 55.079173][ T1020] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817)
[ 55.079347][ T1020] ? 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)
[ 55.079507][ T1020] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 55.079635][ T1020] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 55.079797][ T1020] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 55.079956][ T1020] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817)
[ 55.080118][ T1020] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 55.080294][ T1020] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 55.080461][ T1020] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 55.080634][ T1020] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 55.080812][ T1020] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 55.080972][ T1020] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 55.081138][ T1020] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 55.081301][ T1020] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 55.081473][ T1020] ____sys_sendmsg (net/socket.c:713 net/socket.c:728 net/socket.c:2568)
[ 55.081641][ T1020] ? __pfx_____sys_sendmsg (net/socket.c:2514)
[ 55.081800][ T1020] ? __pfx_copy_msghdr_from_user (net/socket.c:2494)
[ 55.082020][ T1020] ___sys_sendmsg (net/socket.c:2624)
[ 55.082174][ T1020] ? 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)
[ 55.082330][ T1020] ? __pfx____sys_sendmsg (net/socket.c:2611)
[ 55.082489][ T1020] ? usage_skip (kernel/locking/lockdep.c:2314 kernel/locking/lockdep.c:2282)
[ 55.082653][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340)
[ 55.082814][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340)
[ 55.082976][ T1020] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 55.083134][ T1020] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 55.083294][ T1020] __sys_sendmsg (net/socket.c:2654)
[ 55.083449][ T1020] ? __pfx___sys_sendmsg (net/socket.c:2639)
[ 55.083613][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1340)
[ 55.083775][ T1020] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 55.083936][ T1020] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   55.084129][ T1020] RIP: 0033:0x7f4af75bc9a7
[ 55.084298][ T1020] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   55.084865][ T1020] RSP: 002b:00007ffcc6fdb538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   55.085110][ T1020] RAX: ffffffffffffffda RBX: 000000000047da00 RCX: 00007f4af75bc9a7
[   55.085350][ T1020] RDX: 0000000000000000 RSI: 00007ffcc6fdb5a0 RDI: 0000000000000005
[   55.085588][ T1020] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[   55.085827][ T1020] R10: 00007f4af7475708 R11: 0000000000000246 R12: 00007ffcc6fe09bf
[   55.086078][ T1020] R13: 0000000067859462 R14: 0000000000483b60 R15: 00007ffcc6fe09c7
| [ 55.088161][ T1020] #1: ffff88800af7c090 (&tp->lock){+.+.}-{3:3}, at: tc_new_tfilter (net/sched/cls_api.c:2383)
| [ 55.088396][ T1020] #2: ffffffffad3f1cd0 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_inc (kernel/jump_label.c:191)
| [   55.088629][ T1020] stack backtrace:
| [   55.088958][ T1020] Tainted: [W]=WARN
[   55.089062][ T1020] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   55.089227][ T1020] Call Trace:
[   55.089330][ T1020]  <TASK>
[ 55.089403][ T1020] dump_stack_lvl (lib/dump_stack.c:123)
[ 55.089538][ T1020] __lock_acquire (kernel/locking/lockdep.c:4828 kernel/locking/lockdep.c:4898 kernel/locking/lockdep.c:5176)
[ 55.089673][ T1020] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 55.089807][ T1020] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.089973][ T1020] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 55.090109][ T1020] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 55.090242][ T1020] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 55.090377][ T1020] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.090540][ T1020] __mutex_lock (kernel/locking/mutex.c:587 kernel/locking/mutex.c:735)
[ 55.090680][ T1020] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.090841][ T1020] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.091016][ T1020] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 55.091153][ T1020] ? static_key_slow_inc (kernel/jump_label.c:191)
[ 55.091286][ T1020] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 55.091420][ T1020] ? static_key_fast_inc_not_disabled (./arch/x86/include/asm/atomic.h:23 (discriminator 3) ./include/linux/atomic/atomic-arch-fallback.h:457 (discriminator 3) ./include/linux/atomic/atomic-instrumented.h:33 (discriminator 3) kernel/jump_label.c:141 (discriminator 3))
[ 55.091590][ T1020] ? __pfx_static_key_fast_inc_not_disabled (kernel/jump_label.c:128)
[ 55.091753][ T1020] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.091919][ T1020] static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151)
[ 55.092085][ T1020] static_key_slow_inc (kernel/jump_label.c:191)
[ 55.092217][ T1020] tc_new_tfilter (net/sched/cls_api.c:2385)
[ 55.092352][ T1020] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 55.092454][ T1020] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186)
[ 55.092592][ T1020] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 55.092726][ T1020] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6912)
[ 55.092857][ T1020] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186)
[ 55.092993][ T1020] rtnetlink_rcv_msg (net/core/rtnetlink.c:6914)
[ 55.093126][ T1020] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817)
[ 55.093266][ T1020] ? 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)
[ 55.093394][ T1020] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 55.093493][ T1020] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 55.093623][ T1020] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 55.093750][ T1020] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817)
[ 55.093881][ T1020] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 55.094013][ T1020] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 55.094142][ T1020] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 55.094272][ T1020] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 55.094401][ T1020] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 55.094531][ T1020] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 55.094662][ T1020] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 55.094820][ T1020] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 55.094954][ T1020] ____sys_sendmsg (net/socket.c:713 net/socket.c:728 net/socket.c:2568)
[ 55.095086][ T1020] ? __pfx_____sys_sendmsg (net/socket.c:2514)
[ 55.095236][ T1020] ? __pfx_copy_msghdr_from_user (net/socket.c:2494)
[ 55.095402][ T1020] ___sys_sendmsg (net/socket.c:2624)
[ 55.095533][ T1020] ? 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)
[ 55.095665][ T1020] ? __pfx____sys_sendmsg (net/socket.c:2611)
[ 55.095801][ T1020] ? usage_skip (kernel/locking/lockdep.c:2314 kernel/locking/lockdep.c:2282)
[ 55.095934][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340)
[ 55.096067][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340)
[ 55.096199][ T1020] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 55.096331][ T1020] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 55.096470][ T1020] __sys_sendmsg (net/socket.c:2654)
[ 55.096599][ T1020] ? __pfx___sys_sendmsg (net/socket.c:2639)
[ 55.096729][ T1020] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1340)
[ 55.096861][ T1020] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 55.096990][ T1020] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   55.097150][ T1020] RIP: 0033:0x7f4af75bc9a7
[ 55.097285][ T1020] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   55.097741][ T1020] RSP: 002b:00007ffcc6fdb538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   55.097934][ T1020] RAX: ffffffffffffffda RBX: 000000000047da00 RCX: 00007f4af75bc9a7
[   55.098127][ T1020] RDX: 0000000000000000 RSI: 00007ffcc6fdb5a0 RDI: 0000000000000005
[   55.098317][ T1020] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[   55.098512][ T1020] R10: 00007f4af7475708 R11: 0000000000000246 R12: 00007ffcc6fe09bf


Finger prints:
__lock_acquire:__mutex_lock:static_key_slow_inc_cpuslocked:static_key_slow_inc:tc_new_tfilter
__might_resched:cpus_read_lock:static_key_slow_inc:tc_new_tfilter:rtnetlink_rcv_msg