rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (9359 ticks this GP) idle=ff6/1/0x4000000000000000 softirq=36202/36203 fqs=4886 (t=10501 jiffies g=54245 q=65) NMI backtrace for cpu 1 CPU: 1 PID: 21928 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 ba 64 55 f8 48 89 ef e8 32 1a 56 f8 80 e7 02 74 06 e8 58 7a 75 f8 fb bf 01 00 00 00 3d 16 4a f8 65 8b 05 06 2c fe 76 85 c0 74 03 5b 5d c3 e8 61 81 RSP: 0018:ffffc90000db0e48 EFLAGS: 00000202 RAX: 0000000001797ada RBX: 0000000000000282 RCX: 1ffffffff1f56502 RDX: 0000000000000000 RSI: 0000000000000104 RDI: 0000000000000001 RBP: ffff8880b9d26340 R08: 0000000000000001 R09: ffffffff8faab877 R10: 0000000000000001 R11: 0000000000000000 R12: 0000009719d68486 R13: ffff8880b9d265c0 R14: ffff8880b9d26340 R15: ffffffff85189990 __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:rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1219 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x91/0x150 kernel/rcu/tree.c:1208 Code: c6 08 8b 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 90 00 00 00 48 8d 7b 20 48 8b 6b 18 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 RSP: 0018:ffffc9000274f5c0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8880b9d35fc0 RCX: ffffffff81593018 RDX: 1ffff110173a6bfb RSI: 0000000000000003 RDI: ffff8880b9d35fe0 RBP: ffffffff8bf7cd80 R08: 0000000000000000 R09: ffffffff8dc5d98f R10: fffffbfff1b8bb31 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff8bf747e0 R14: 0000000000000000 R15: 0000000000000000 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held_common kernel/rcu/update.c:102 [inline] rcu_read_lock_sched_held+0x25/0x70 kernel/rcu/update.c:123 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x5d4/0x730 kernel/locking/lockdep.c:5481 rcu_lock_acquire include/linux/rcupdate.h:267 [inline] rcu_read_lock include/linux/rcupdate.h:656 [inline] lock_page_memcg+0x69/0x4f0 mm/memcontrol.c:2170 page_remove_rmap+0x25/0x1360 mm/rmap.c:1334 zap_pte_range mm/memory.c:1276 [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+0xe30/0x2650 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:00007f3d36b69188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff5 RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc56f6c15f R14: 00007f3d36b69300 R15: 0000000000022000