======================================
| [ 600.464541][ C3] #2: ffff888011373358 (&br->multicast_lock){+.-.}-{3:3}, at: br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge 
| [ 600.465028][ C3] #3: ffffffff8635b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:901 net/core/dev.c:4555) 
| [  600.465390][    C3]
| [  600.465390][    C3] stack backtrace:
[  600.465642][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  600.465643][    C3] Call Trace:
[  600.465645][    C3]  <IRQ>
[ 600.465647][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 600.465656][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[ 600.465668][ C3] dev_hard_start_xmit (./include/net/net_namespace.h:418 ./include/linux/netdevice.h:2695 net/core/dev.c:2466 net/core/dev.c:3772 net/core/dev.c:3793) 
[ 600.465679][ C3] __dev_queue_xmit (net/core/dev.h:340 net/core/dev.c:4631) 
[ 600.465684][ C3] ? ipv6_dev_get_saddr (net/ipv6/addrconf.c:1809) 
[ 600.465694][ C3] ? __pfx_ipv6_dev_get_saddr (net/ipv6/addrconf.c:1809) 
[ 600.465700][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4538) 
[ 600.465714][ C3] ? __pfx___br_multicast_query_handle_vlan (net/bridge/br_multicast.c:909) bridge 
[ 600.465759][ C3] ? br_ip6_multicast_alloc_query (./include/linux/skbuff.h:2776 net/bridge/br_multicast.c:1231) bridge 
[ 600.465799][ C3] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge 
[ 600.465831][ C3] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge 
[ 600.465863][ C3] ? br_multicast_count (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/trace/events/../../../net/bridge/br_private.h:764 net/bridge/br_multicast.c:5052) bridge 
[ 600.465903][ C3] __br_multicast_send_query (net/bridge/br_multicast.c:1813) bridge 
[ 600.465947][ C3] ? __pfx___br_multicast_send_query (net/bridge/br_multicast.c:1789) bridge 
[ 600.465987][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 600.465998][ C3] ? br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge 
[ 600.466032][ C3] br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge 
[ 600.466070][ C3] ? __pfx_br_multicast_send_query (net/bridge/br_multicast.c:1852) bridge 
[ 600.466103][ C3] ? br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge 
[ 600.466141][ C3] ? __pfx_br_ip6_multicast_port_query_expired (net/bridge/br_multicast.c:1929) bridge 
[ 600.466175][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 600.466182][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 600.466186][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 600.466190][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 600.466193][ C3] ? br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge 
[ 600.466233][ C3] ? br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge 
[ 600.466266][ C3] br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge 
[ 600.466302][ C3] ? __pfx_br_ip6_multicast_port_query_expired (net/bridge/br_multicast.c:1929) bridge 
[ 600.466336][ C3] call_timer_fn (kernel/time/timer.c:1789) 
[ 600.466339][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 600.466342][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 600.466346][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) 
[ 600.466350][ C3] ? 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:230) 
[ 600.466359][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 600.466371][ C3] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) 
[ 600.466375][ C3] ? __pfx_br_ip6_multicast_port_query_expired (net/bridge/br_multicast.c:1929) bridge 
[ 600.466417][ C3] ? __pfx___run_timers (kernel/time/timer.c:2385) 
[ 600.466420][ C3] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 600.466431][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 600.466435][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 600.466439][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 600.466442][ C3] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 600.466453][ C3] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 600.466458][ C3] handle_softirqs (kernel/softirq.c:561) 
[ 600.466472][ C3] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[ 600.466476][ C3] irq_exit_rcu (kernel/softirq.c:680) 
[ 600.466479][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[  600.466484][    C3]  </IRQ>
[  600.466485][    C3]  <TASK>
[ 600.466487][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 600.466492][ C3] RIP: 0010:page_cache_ra_unbounded (mm/readahead.c:271) 
[ 600.466496][ C3] Code: 24 10 0f 84 1f 01 00 00 48 8b 04 24 48 8b 7c 24 20 4c 8d 34 18 4c 89 f6 e8 2f 30 22 02 48 85 c0 74 08 a8 01 0f 84 41 02 00 00 <44> 89 e6 48 89 ef e8 47 f2 ff ff 49 89 c5 48 85 c0 0f 84 e6 00 00
All code
========
   0:	24 10                	and    $0x10,%al
   2:	0f 84 1f 01 00 00    	je     0x127
   8:	48 8b 04 24          	mov    (%rsp),%rax
   c:	48 8b 7c 24 20       	mov    0x20(%rsp),%rdi
  11:	4c 8d 34 18          	lea    (%rax,%rbx,1),%r14
  15:	4c 89 f6             	mov    %r14,%rsi
  18:	e8 2f 30 22 02       	call   0x222304c
  1d:	48 85 c0             	test   %rax,%rax
  20:	74 08                	je     0x2a
  22:	a8 01                	test   $0x1,%al
  24:	0f 84 41 02 00 00    	je     0x26b
  2a:*	44 89 e6             	mov    %r12d,%esi		<-- trapping instruction
  2d:	48 89 ef             	mov    %rbp,%rdi
  30:	e8 47 f2 ff ff       	call   0xfffffffffffff27c
  35:	49 89 c5             	mov    %rax,%r13
  38:	48 85 c0             	test   %rax,%rax
  3b:	0f                   	.byte 0xf
  3c:	84 e6                	test   %ah,%dh
	...

Code starting with the faulting instruction
===========================================
   0:	44 89 e6             	mov    %r12d,%esi
   3:	48 89 ef             	mov    %rbp,%rdi
   6:	e8 47 f2 ff ff       	call   0xfffffffffffff252
   b:	49 89 c5             	mov    %rax,%r13
   e:	48 85 c0             	test   %rax,%rax
  11:	0f                   	.byte 0xf
  12:	84 e6                	test   %ah,%dh
	...
[  600.466499][    C3] RSP: 0000:ffffc90009e97920 EFLAGS: 00000246
[  600.466502][    C3] RAX: 0000000000000000 RBX: 0000000000000012 RCX: 1ffff11001f589ff
[  600.466504][    C3] RDX: 0000000000000000 RSI: ffffffff8635b620 RDI: ffff88800fac49c4
[  600.466505][    C3] RBP: ffffc90009e979e0 R08: ffffffff85318cf3 R09: fffffbfff0db2c32
[  600.466507][    C3] R10: ffffffff86d96197 R11: ffff88800fac45c0 R12: 0000000000112cca
[  600.466509][    C3] R13: ffffea00004736c0 R14: 0000000000000047 R15: ffff888001499f48
[ 600.466517][ C3] ? xa_load (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 lib/xarray.c:1488) 
[ 600.466543][ C3] do_sync_mmap_readahead (mm/filemap.c:3260) 
[ 600.466551][ C3] ? __pfx_do_sync_mmap_readahead (mm/filemap.c:3192) 
[ 600.466564][ C3] ? __filemap_get_folio (mm/filemap.c:1905) 
[ 600.466573][ C3] filemap_fault (mm/filemap.c:3446) 
[ 600.466579][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 600.466583][ C3] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5371) 
[ 600.466591][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 600.466597][ C3] ? __pfx_filemap_fault (mm/filemap.c:3405) 
[ 600.466608][ C3] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5371) 
[ 600.466612][ C3] ? __pfx_filemap_map_pages (mm/filemap.c:3766) 
[ 600.466621][ C3] __do_fault (mm/memory.c:4990) 
[ 600.466628][ C3] do_pte_missing (mm/memory.c:5410 mm/memory.c:5544 mm/memory.c:4060) 
[ 600.466631][ C3] ? handle_pte_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/pgtable.h:136 mm/memory.c:5901) 
[ 600.466639][ C3] handle_pte_fault (mm/memory.c:5907) 
[ 600.466646][ C3] ? __pfx_handle_pte_fault (mm/memory.c:5864) 
[ 600.466660][ C3] __handle_mm_fault (mm/memory.c:6050) 
[ 600.466665][ C3] ? __pfx___handle_mm_fault (mm/memory.c:5959) 
[ 600.466685][ C3] ? __pfx_lock_vma_under_rcu (mm/memory.c:6375) 
[ 600.466693][ C3] handle_mm_fault (mm/memory.c:6231) 
[ 600.466698][ C3] ? __pfx_handle_mm_fault (mm/memory.c:6186) 
[ 600.466712][ C3] do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 600.466727][ C3] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:147 arch/x86/mm/fault.c:1488 arch/x86/mm/fault.c:1538) 
[ 600.466733][ C3] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[  600.466735][    C3] RIP: 0033:0x7f02219aa178
[ 600.466742][ C3] Code: Unable to access opcode bytes at 0x7f02219aa14e.

Code starting with the faulting instruction
===========================================
[  600.466743][    C3] RSP: 002b:00007ffcde5510a8 EFLAGS: 00010206
[  600.466746][    C3] RAX: 00007f02219aa178 RBX: 00007f0221a37000 RCX: 0000000000000000
[  600.466747][    C3] RDX: 00007f02219c3c18 RSI: 0000000000000000 RDI: 00007f02219c67e0
[  600.466749][    C3] RBP: 00007ffcde551170 R08: 0000000000000000 R09: 0000000000000060
[  600.466750][    C3] R10: 00007f0221734fa8 R11: 00007f0221786910 R12: 0000000000000000


Finger prints:
lockdep_rcu_suspicious:dev_hard_start_xmit:__dev_queue_xmit:br_dev_queue_push_xmit:__br_multicast_send_query