syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=27f/1/0x4000000000000000 softirq=5557/5560 fqs=5214 
	(t=10502 jiffies g=5861 q=2014)
NMI backtrace for cpu 0
CPU: 0 PID: 3649 Comm: syz-executor.0 Not tainted 5.15.126-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 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:3911 [inline]
 rcu_sched_clock_irq+0xf26/0x1770 kernel/rcu/tree.c:2606
 update_process_times+0x196/0x200 kernel/time/timer.c:1788
 tick_sched_handle kernel/time/tick-sched.c:237 [inline]
 tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x1a/0x80 kernel/kcov.c:291
Code: 18 4c 89 44 0a 20 49 ff c1 4c 89 09 c3 0f 1f 00 4c 8b 04 24 65 48 8b 0d d4 59 82 7e 65 8b 05 d5 59 82 7e a9 00 01 ff 00 74 10 <a9> 00 01 00 00 74 57 83 b9 34 16 00 00 00 74 4e 8b 81 10 16 00 00
RSP: 0018:ffffc90000007a88 EFLAGS: 00000206
RAX: 0000000000000102 RBX: 00028f5c28f5c28f RCX: ffff88807d993b80
RDX: ffff88807d993b80 RSI: 0000000000000000 RDI: 00028f5c28f5c28f
RBP: 0019999999999998 R08: ffffffff88698b03 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000225c17d04
R13: 0000000000000000 R14: 00000015798ee228 R15: 1ffff1100f21df63
 pie_calculate_probability+0x223/0x820 net/sched/sch_pie.c:348
 fq_pie_timer+0x132/0x260 net/sched/sch_fq_pie.c:389
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_lock_switch+0x91/0x100 kernel/sched/core.c:4781
Code: 45 31 c9 68 47 63 59 81 e8 fc 19 09 00 48 83 c4 08 4c 89 ff e8 40 d9 fe ff 66 90 4c 89 ff e8 46 55 cc 08 e8 f1 24 2d 00 fb 5b <41> 5c 41 5d 41 5e 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 87
RSP: 0018:ffffc900040cea58 EFLAGS: 00000282
RAX: ce59a8076f677600 RBX: ffff888014de8034 RCX: ffffffff8162eaf8
RDX: dffffc0000000000 RSI: ffffffff8a8b0c60 RDI: ffffffff8ad876c0
RBP: ffffc900040cead0 R08: dffffc0000000000 R09: fffffbfff1f7ae22
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff11017347483 R14: ffff8880b9a3a418 R15: ffff8880b9a396c0
 finish_task_switch+0x134/0x630 kernel/sched/core.c:4898
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0x12cc/0x4590 kernel/sched/core.c:6372
 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6548
 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6573
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:403 [inline]
 __cond_resched_lock+0x7c/0xe0 kernel/sched/core.c:8286
 __purge_vmap_area_lazy+0x1623/0x1740 mm/vmalloc.c:1710
 try_purge_vmap_area_lazy+0x34/0x50 mm/vmalloc.c:1723
 free_unmap_vmap_area mm/vmalloc.c:1778 [inline]
 remove_vm_area+0x1ae/0x1d0 mm/vmalloc.c:2517
 vm_remove_mappings mm/vmalloc.c:2546 [inline]
 __vunmap+0x325/0xa20 mm/vmalloc.c:2611
 qdisc_destroy+0x114/0x3b0 net/sched/sch_generic.c:1025
 notify_and_destroy net/sched/sch_api.c:1012 [inline]
 qdisc_graft+0x113b/0x1460 net/sched/sch_api.c:1089
 tc_modify_qdisc+0xee9/0x1710 net/sched/sch_api.c:1700
 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5603
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2412
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2466
 __sys_sendmsg net/socket.c:2495 [inline]
 __do_sys_sendmsg net/socket.c:2504 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2502
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f6e37f7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6e372fe0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6e3809bf80 RCX: 00007f6e37f7cae9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003
RBP: 00007f6e37fc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6e3809bf80 R15: 00007fff83143f48
 </TASK>