INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=32824, c=32823, q=4)
All QSes seen, last rcu_sched kthread activity 10502 (4295038179-4295027677), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.3  R  running task    28240 14581   7366 0x8000000c
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xcb1/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1590
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:165
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:mrp_periodic_timer+0x4/0x50 net/802/mrp.c:609
RSP: 0018:ffff8880aec07d40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffffffff852d4d00 RBX: ffff88809f0435e0 RCX: ffff888067f4ae80
RDX: 0000000000000100 RSI: ffffffff87f87220 RDI: ffff88809f043580
RBP: ffff8880aec07d40 R08: 0000000000007759 R09: ffffffff895a4488
R10: ffff888067f4aed0 R11: ffff888067f4a600 R12: 0000000000000101
R13: ffff8880aec07dd0 R14: ffff8880aec239c0 R15: 0000000000000000
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 kernel/kcov.c:68
RSP: 0018:ffff88820c887770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff888067f4a600 RBX: 0000000000000000 RCX: 1ffffffff0f82dac
RDX: 0000000000000000 RSI: ffffffff87047cc0 RDI: ffffea0002208f40
RBP: ffff88820c8877a8 R08: 0000000000000000 R09: ffff888067f4aec8
R10: ffff888067f4aea8 R11: ffff888067f4a600 R12: ffffea0002208f40
R13: ffffea0002208f60 R14: ffffea0002208f40 R15: dead000000000100
 zap_pte_range mm/memory.c:1342 [inline]
 zap_pmd_range mm/memory.c:1444 [inline]
 zap_pud_range mm/memory.c:1473 [inline]
 zap_p4d_range mm/memory.c:1494 [inline]
 unmap_page_range+0xabd/0x19f0 mm/memory.c:1515
 unmap_single_vma+0x15d/0x2c0 mm/memory.c:1560
 unmap_vmas+0xac/0x170 mm/memory.c:1590
 exit_mmap+0x285/0x4e0 mm/mmap.c:3056
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2413
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode+0x1b5/0x220 arch/x86/entry/common.c:199
 retint_user+0x8/0x18
RIP: 0033:0x45e18a
RSP: 002b:00007f35f4944c58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: 000000000075bf28 RCX: 000000000045e18a
RDX: 0000000000000000 RSI: 00007f35f4944c60 RDI: 0000000000000001
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 0000000000000b38 R14: 00000000004cc22c R15: 000000000075bf2c