rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=85d/1/0x4000000000000000 softirq=171869/171869 fqs=4310 
	(t=10500 jiffies g=321601 q=1587)
NMI backtrace for cpu 0
CPU: 0 PID: 31544 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:128 [inline]
RIP: 0010:pie_calculate_probability+0x27d/0x7c0 net/sched/sch_pie.c:348
Code: 89 c6 4c 89 6c 24 38 e8 41 d2 22 fa 47 8d 24 a4 31 d2 4c 89 ff 43 8d 0c 24 48 c1 ed 02 48 b8 ff ff ff ff ff ff ff 00 48 f7 f1 <49> 89 c5 48 89 c6 48 c1 eb 02 49 89 cc e8 81 d5 22 fa 4d 39 ef 73
RSP: 0018:ffffc90000007c50 EFLAGS: 00000203
RAX: 00000010c6f7a0b5 RBX: 0000000002af31dc RCX: 00000000000f4240
RDX: 00000000000e28bf RSI: ffffffff87544e2f RDI: 0000000000000000
RBP: 0000000000112e0b R08: 00000000000f4240 R09: 0000000000000000
R10: ffffffff87544e76 R11: 0000000000000000 R12: 000000000007a120
R13: 000000a7c5ac471b R14: 0000000000000002 R15: 0000000000000000
 fq_pie_timer+0x170/0x2a0 net/sched/sch_fq_pie.c:383
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:maybe_mkwrite include/linux/mm.h:990 [inline]
RIP: 0010:__split_huge_pmd_locked mm/huge_memory.c:2091 [inline]
RIP: 0010:__split_huge_pmd+0x22a9/0x3cf0 mm/huge_memory.c:2203
Code: 2e b7 ff 48 8b 44 24 60 4c 09 f3 48 b9 00 00 00 00 00 fc ff df 48 8d 78 50 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 77 16 00 00 <48> 8b 44 24 60 31 ff 48 8b 40 50 49 89 c4 48 89 44 24 70 41 83 e4
RSP: 0018:ffffc90005007898 EFLAGS: 00000246
RAX: 1ffff1100d0ffe0a RBX: 0000000083f8f025 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: ffffffff81bff1f2 RDI: ffff8880687ff050
RBP: 0000000000000000 R08: 0000000000000025 R09: 0000000000000000
R10: ffffffff81bff384 R11: 0000000000000000 R12: 0000000000000025
R13: 0000000000000000 R14: 0000000083f8f000 R15: ffffffffffffffff
 split_huge_pmd_address+0x1a4/0x1e0 mm/huge_memory.c:2246
 split_huge_pmd_if_needed mm/huge_memory.c:2258 [inline]
 split_huge_pmd_if_needed mm/huge_memory.c:2249 [inline]
 vma_adjust_trans_huge+0x135/0x360 mm/huge_memory.c:2267
 __vma_adjust+0x1f9/0x2530 mm/mmap.c:837
 vma_adjust include/linux/mm.h:2656 [inline]
 __split_vma+0x467/0x550 mm/mmap.c:2739
 __do_munmap+0xcae/0x11a0 mm/mmap.c:2849
 do_munmap mm/mmap.c:2894 [inline]
 munmap_vma_range mm/mmap.c:603 [inline]
 mmap_region+0x2fd/0x1650 mm/mmap.c:1741
 do_mmap+0x869/0xfb0 mm/mmap.c:1575
 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
 ksys_mmap_pgoff+0x40d/0x5a0 mm/mmap.c:1623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f284358cae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2840b02188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f284369ff60 RCX: 00007f284358cae9
RDX: 00000000007fffff RSI: 0000000000003000 RDI: 0000000020000000
RBP: 00007f28435e6f6d R08: 0000000000000003 R09: 0000000000000000
R10: 0000040000000011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccd471b9f R14: 00007f2840b02300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 c6                	mov    %eax,%esi
   2:	4c 89 6c 24 38       	mov    %r13,0x38(%rsp)
   7:	e8 41 d2 22 fa       	callq  0xfa22d24d
   c:	47 8d 24 a4          	lea    (%r12,%r12,4),%r12d
  10:	31 d2                	xor    %edx,%edx
  12:	4c 89 ff             	mov    %r15,%rdi
  15:	43 8d 0c 24          	lea    (%r12,%r12,1),%ecx
  19:	48 c1 ed 02          	shr    $0x2,%rbp
  1d:	48 b8 ff ff ff ff ff 	movabs $0xffffffffffffff,%rax
  24:	ff ff 00
  27:	48 f7 f1             	div    %rcx
* 2a:	49 89 c5             	mov    %rax,%r13 <-- trapping instruction
  2d:	48 89 c6             	mov    %rax,%rsi
  30:	48 c1 eb 02          	shr    $0x2,%rbx
  34:	49 89 cc             	mov    %rcx,%r12
  37:	e8 81 d5 22 fa       	callq  0xfa22d5bd
  3c:	4d 39 ef             	cmp    %r13,%r15
  3f:	73                   	.byte 0x73