rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=135617, q=59) rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4295045146-4295034646), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 27024 20802 9517 0x80004008 Call Trace: sched_show_task kernel/sched/core.c:5952 [inline] sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5927 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.cold+0xb35/0xc55 kernel/rcu/tree.c:2276 update_process_times+0x25/0x60 kernel/time/timer.c:1726 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:171 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x32c/0xdd0 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline] smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1144 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 c0 b4 73 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 3b af b7 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 75 ac 92 f9 65 8b 05 e6 18 46 78 RSP: 0018:ffffc90000da8cc8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12e7698 RBX: 0000000000000282 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffff8880a7a44cf0 R08: ffff8880196c8240 R09: fffffbfff180e58e R10: fffffbfff180e58d R11: ffffffff8c072c6f R12: 0000000000000000 R13: ffff8880a7a44cf0 R14: 1ffff920001b51aa R15: ffff8880ae727400 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] skb_dequeue+0x153/0x1c0 net/core/skbuff.c:3040 mrp_queue_xmit net/802/mrp.c:350 [inline] mrp_join_timer+0x5f/0x80 net/802/mrp.c:595 call_timer_fn+0x195/0x760 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786 __do_softirq+0x26c/0x99d kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x192/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:lock_release+0xc/0x7c0 kernel/locking/lockdep.c:4492 Code: ba 49 56 00 e9 ea fe ff ff 48 c7 c7 10 04 66 8a e8 a9 49 56 00 e9 14 fd ff ff 0f 1f 40 00 48 ba 00 00 00 00 00 fc ff df 41 57 <41> 56 41 55 49 89 f5 41 54 49 89 fc 55 53 48 81 ec 98 00 00 00 48 RSP: 0018:ffffc900176e7740 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815f427f RDX: dffffc0000000000 RSI: ffffffff81b51f3f RDI: ffffffff897accc0 RBP: ffffea00016a3ec0 R08: ffff8880196c8240 R09: ffffed1015ce7074 R10: ffffed1015ce7073 R11: ffff8880ae73839b R12: ffffea00016a3ec8 R13: 0000000000000000 R14: 0000000000000000 R15: dead000000000100 page_remove_file_rmap mm/rmap.c:1273 [inline] page_remove_rmap+0x5f2/0x1190 mm/rmap.c:1330 zap_pte_range mm/memory.c:1080 [inline] 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+0xd14/0x26e0 mm/memory.c:1255 unmap_single_vma+0x196/0x300 mm/memory.c:1300 unmap_vmas+0x16f/0x2f0 mm/memory.c:1332 exit_mmap+0x2aa/0x510 mm/mmap.c:3126 __mmput kernel/fork.c:1082 [inline] mmput+0x168/0x4b0 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0xa51/0x2dd0 kernel/exit.c:788 do_group_exit+0x125/0x340 kernel/exit.c:899 get_signal+0x47b/0x24e0 kernel/signal.c:2739 do_signal+0x7e/0x13f0 arch/x86/kernel/signal.c:813 exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c679 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:00007fbffad8fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000076bf08 RCX: 000000000045c679 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076bf08 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000076bf0c R13: 00007fff65c6f3ff R14: 00007fbffad909c0 R15: 000000000076bf0c