rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=150737, q=48) rcu: All QSes seen, last rcu_preempt kthread activity 10496 (4295045051-4295034555), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 26808 29358 8895 0x8000400c Call Trace: sched_show_task+0x411/0x560 kernel/sched/core.c:5954 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline] check_cpu_stall kernel/rcu/tree_stall.h:558 [inline] rcu_pending kernel/rcu/tree.c:3030 [inline] rcu_sched_clock_irq+0x188c/0x1aa0 kernel/rcu/tree.c:2276 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:171 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x3f3/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x37c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0xe0 kernel/locking/spinlock.c:191 Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 50 d2 2a 89 e8 17 b3 9e f9 48 83 3d 8f bc 15 01 00 74 2d 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 19 d6 3d f9 65 8b 05 ee 07 ed 77 RSP: 0018:ffffc90000007cb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1255a4a RBX: ffff88809f5c10f0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffffc90000007cc8 R08: ffff88803bbf0d98 R09: fffffbfff1404926 R10: fffffbfff1404926 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000282 R15: ffff88809f5c10f0 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] skb_dequeue+0x122/0x160 net/core/skbuff.c:3042 mrp_queue_xmit net/802/mrp.c:350 [inline] mrp_join_timer+0x95/0x130 net/802/mrp.c:595 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x776/0x970 kernel/time/timer.c:1773 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786 __do_softirq+0x283/0x7bd kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:check_kcov_mode kernel/kcov.c:164 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:187 Code: 5b 5d c3 cc 55 48 89 e5 48 8b 45 08 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 34 5d 8b 7e f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 <83> fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 8b 89 84 RSP: 0018:ffffc900027d7608 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81a906b6 RBX: ffffea00023cda40 RCX: ffff88803bbf0540 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00023cda40 RBP: ffffc900027d7608 R08: ffffffff81a56fec R09: fffff94000479b49 R10: fffff94000479b49 R11: 0000000000000000 R12: ffffea00023cda40 R13: dffffc0000000000 R14: 00fffe0000002036 R15: 0000000000000000 page_remove_rmap+0x26/0x6f0 mm/rmap.c:1328 zap_pte_range+0xa17/0x1c20 mm/memory.c:1080 zap_pmd_range mm/memory.c:1184 [inline] zap_pud_range mm/memory.c:1213 [inline] zap_p4d_range mm/memory.c:1234 [inline] unmap_page_range+0x9b5/0xaf0 mm/memory.c:1255 unmap_single_vma+0x1d4/0x2e0 mm/memory.c:1300 unmap_vmas+0x15e/0x2b0 mm/memory.c:1332 exit_mmap+0x281/0x540 mm/mmap.c:3134 __mmput+0x120/0x3a0 kernel/fork.c:1082 mmput+0x5d/0x70 kernel/fork.c:1103 exit_mm+0x4f4/0x580 kernel/exit.c:485 do_exit+0x572/0x2000 kernel/exit.c:788 do_group_exit+0x15c/0x2b0 kernel/exit.c:899 get_signal+0x13db/0x1d20 kernel/signal.c:2734 do_signal+0x37/0x640 arch/x86/kernel/signal.c:813 exit_to_usermode_loop arch/x86/entry/common.c:160 [inline] prepare_exit_to_usermode+0x326/0x5b0 arch/x86/entry/common.c:195 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b399 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd79339cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff2 RBX: 00007fd79339d6d4 RCX: 000000000045b399 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000002102001ffc RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000070 R14: 00000000004c1c24 R15: 000000000075bf2c