rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=6ef/1/0x4000000000000000 softirq=50199/50199 fqs=0 
	(t=10500 jiffies g=77373 q=194)
rcu: rcu_preempt kthread starved for 10500 jiffies! g77373 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28736 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4f00 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1963
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 14630 Comm: syz-executor.0 Not tainted 5.16.0-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:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:458
 print_cpu_stall kernel/rcu/tree_stall.h:602 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3919 [inline]
 rcu_sched_clock_irq.cold+0x57/0x759 kernel/rcu/tree.c:2617
 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:1428
 __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 71 a7 16 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 b1 aa 16 fa 4d 39 ef 73
RSP: 0018:ffffc90000007c50 EFLAGS: 00000203
RAX: 00000010c6f7a0b5 RBX: 0000000002af31dc RCX: 00000000000f4240
RDX: 00000000000e28bf RSI: ffffffff8761235f RDI: 0000000000000000
RBP: 0000000000112e0b R08: 00000000000f4240 R09: 0000000000000000
R10: ffffffff876123a6 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+0x67c/0xa30 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:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 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:stack_trace_consume_entry+0xef/0x160 kernel/stacktrace.c:95
Code: fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 5c 48 89 75 00 8b 43 08 39 43 10 0f 92 c0 48 83 c4 08 5b 5d c3 83 e8 01 89 43 0c <48> 83 c4 08 b8 01 00 00 00 5b 5d c3 48 89 34 24 e8 9c 0b 59 00 48
RSP: 0018:ffffc900115ff650 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900115ff728 RCX: ffffc900115ff700
RDX: 0000000000000000 RSI: ffffffff8165da8c RDI: ffffc900115ff734
RBP: 0000000000000000 R08: ffffffff8e0def02 R09: 0000000000000001
R10: fffff520022bfed9 R11: 0000000000088077 R12: ffffc900115ff728
R13: 0000000000000000 R14: ffff88802124d700 R15: 0000000000002800
 arch_stack_walk+0x6d/0xe0 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470
 kasan_slab_alloc include/linux/kasan.h:260 [inline]
 slab_post_alloc_hook mm/slab.h:738 [inline]
 slab_alloc_node mm/slub.c:3230 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x142/0x3a0 mm/slub.c:3243
 xas_alloc+0x330/0x440 lib/xarray.c:374
 xas_expand lib/xarray.c:581 [inline]
 xas_create+0x56a/0x1070 lib/xarray.c:652
 xas_store+0x8a/0x1bc0 lib/xarray.c:784
 __xa_alloc+0x209/0x380 lib/xarray.c:1825
 xa_alloc include/linux/xarray.h:860 [inline]
 qrtr_port_assign net/qrtr/af_qrtr.c:730 [inline]
 __qrtr_bind.isra.0+0x2da/0x6d0 net/qrtr/af_qrtr.c:783
 qrtr_autobind net/qrtr/af_qrtr.c:814 [inline]
 qrtr_autobind+0xaf/0xf0 net/qrtr/af_qrtr.c:802
 qrtr_connect+0x10c/0x2e0 net/qrtr/af_qrtr.c:1095
 __sys_connect_file+0x155/0x1a0 net/socket.c:1900
 __sys_connect+0x161/0x190 net/socket.c:1917
 __do_sys_connect net/socket.c:1927 [inline]
 __se_sys_connect net/socket.c:1924 [inline]
 __ia32_sys_connect+0x6e/0xb0 net/socket.c:1924
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ea6549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f58a05cc EFLAGS: 00000296 ORIG_RAX: 000000000000016a
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000040
RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 14630 Comm: syz-executor.0 Not tainted 5.16.0-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:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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:604 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3919 [inline]
 rcu_sched_clock_irq.cold+0x5c/0x759 kernel/rcu/tree.c:2617
 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:1428
 __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 71 a7 16 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 b1 aa 16 fa 4d 39 ef 73
RSP: 0018:ffffc90000007c50 EFLAGS: 00000203
RAX: 00000010c6f7a0b5 RBX: 0000000002af31dc RCX: 00000000000f4240
RDX: 00000000000e28bf RSI: ffffffff8761235f RDI: 0000000000000000
RBP: 0000000000112e0b R08: 00000000000f4240 R09: 0000000000000000
R10: ffffffff876123a6 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+0x67c/0xa30 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:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 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:stack_trace_consume_entry+0xef/0x160 kernel/stacktrace.c:95
Code: fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 5c 48 89 75 00 8b 43 08 39 43 10 0f 92 c0 48 83 c4 08 5b 5d c3 83 e8 01 89 43 0c <48> 83 c4 08 b8 01 00 00 00 5b 5d c3 48 89 34 24 e8 9c 0b 59 00 48
RSP: 0018:ffffc900115ff650 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900115ff728 RCX: ffffc900115ff700
RDX: 0000000000000000 RSI: ffffffff8165da8c RDI: ffffc900115ff734
RBP: 0000000000000000 R08: ffffffff8e0def02 R09: 0000000000000001
R10: fffff520022bfed9 R11: 0000000000088077 R12: ffffc900115ff728
R13: 0000000000000000 R14: ffff88802124d700 R15: 0000000000002800
 arch_stack_walk+0x6d/0xe0 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470
 kasan_slab_alloc include/linux/kasan.h:260 [inline]
 slab_post_alloc_hook mm/slab.h:738 [inline]
 slab_alloc_node mm/slub.c:3230 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x142/0x3a0 mm/slub.c:3243
 xas_alloc+0x330/0x440 lib/xarray.c:374
 xas_expand lib/xarray.c:581 [inline]
 xas_create+0x56a/0x1070 lib/xarray.c:652
 xas_store+0x8a/0x1bc0 lib/xarray.c:784
 __xa_alloc+0x209/0x380 lib/xarray.c:1825
 xa_alloc include/linux/xarray.h:860 [inline]
 qrtr_port_assign net/qrtr/af_qrtr.c:730 [inline]
 __qrtr_bind.isra.0+0x2da/0x6d0 net/qrtr/af_qrtr.c:783
 qrtr_autobind net/qrtr/af_qrtr.c:814 [inline]
 qrtr_autobind+0xaf/0xf0 net/qrtr/af_qrtr.c:802
 qrtr_connect+0x10c/0x2e0 net/qrtr/af_qrtr.c:1095
 __sys_connect_file+0x155/0x1a0 net/socket.c:1900
 __sys_connect+0x161/0x190 net/socket.c:1917
 __do_sys_connect net/socket.c:1927 [inline]
 __se_sys_connect net/socket.c:1924 [inline]
 __ia32_sys_connect+0x6e/0xb0 net/socket.c:1924
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ea6549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f58a05cc EFLAGS: 00000296 ORIG_RAX: 000000000000016a
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000040
RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 c6                	mov    %eax,%esi
   2:	4c 89 6c 24 38       	mov    %r13,0x38(%rsp)
   7:	e8 71 a7 16 fa       	callq  0xfa16a77d
   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 b1 aa 16 fa       	callq  0xfa16aaed
  3c:	4d 39 ef             	cmp    %r13,%r15
  3f:	73                   	.byte 0x73