rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10330 ticks this GP) idle=c3e/1/0x4000000000000000 softirq=17117/17119 fqs=5003 (t=10500 jiffies g=19545 q=503) NMI backtrace for cpu 0 CPU: 0 PID: 11191 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 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+0x222/0x2a7 kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline] check_cpu_stall kernel/rcu/tree_stall.h:697 [inline] rcu_pending kernel/rcu/tree.c:3830 [inline] rcu_sched_clock_irq.cold+0x4f7/0x11dd kernel/rcu/tree.c:2650 update_process_times+0x16d/0x200 kernel/time/timer.c:1796 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x2e/0x50 kernel/locking/spinlock.c:191 Code: 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 8a 6e 55 f8 48 89 ef e8 02 24 56 f8 80 e7 02 74 06 e8 28 73 75 f8 fb bf 01 00 00 00 cd 1f 4a f8 65 8b 05 56 21 fe 76 85 c0 74 03 5b 5d c3 e8 e1 76 RSP: 0018:ffffc90000007e48 EFLAGS: 00000202 RAX: 00000000016616f2 RBX: 0000000000000282 RCX: 1ffffffff1b8ab81 RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001 RBP: ffff8880b9c26340 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817941b8 R11: 0000000000000000 R12: 000000396ba5e0c2 R13: ffff8880b9c265c0 R14: ffff8880b9c26340 R15: ffffffff8518b770 __run_hrtimer kernel/time/hrtimer.c:1515 [inline] __hrtimer_run_queues+0x51a/0xe40 kernel/time/hrtimer.c:1583 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:preempt_schedule_common+0x2/0xc0 kernel/sched/core.c:5218 Code: de e8 82 d1 b3 f8 e9 5e ff ff ff e8 18 d1 b3 f8 e9 16 ff ff ff e8 2e d1 b3 f8 e9 78 ff ff ff 66 0f 1f 84 00 00 00 00 00 41 55 <41> 54 49 bc 00 00 00 00 00 fc ff df 55 53 65 48 8b 1c 25 00 f0 01 RSP: 0018:ffffc90009b7f720 EFLAGS: 00000202 RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc90009b7f778 R08: 0000000000000000 R09: ffff88801b038b43 R10: ffffed1003607168 R11: 0000000000000000 R12: ffff88802830e600 R13: 0000000000000000 R14: dffffc0000000000 R15: 00007f2901af5000 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:394 [inline] zap_pte_range mm/memory.c:1332 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0xf98/0x2650 mm/memory.c:1451 unmap_single_vma+0x198/0x300 mm/memory.c:1496 unmap_vmas+0x16d/0x2f0 mm/memory.c:1528 exit_mmap+0x2a8/0x590 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1082 mmput+0x58/0x60 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0xb6f/0x2ae0 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x42c/0x2100 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 Code: Unable to access opcode bytes at RIP 0x465ecf. RSP: 002b:00007f29005cd188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000003 RBX: 000000000056c008 RCX: 0000000000465ef9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000028 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffea772539f R14: 00007f29005cd300 R15: 0000000000022000