rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...0: (1 GPs behind) idle=89cc/1/0x4000000000000000 softirq=7142/7143 fqs=2100 (detected by 0, t=10506 jiffies, g=4921, q=522 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3574 Comm: syz-executor218 Not tainted 6.1.79-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] RIP: 0010:rcu_is_watching+0x51/0xb0 kernel/rcu/tree.c:721 Code: a8 b0 8c 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 40 b7 6e 00 48 c7 c3 a8 56 03 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 1e 8b 03 65 ff 0d 05 37 8f 7e 74 0c 83 e0 RSP: 0018:ffffc900001e0ac0 EFLAGS: 00000802 RAX: 1ffff11017326ad5 RBX: ffff8880b99356a8 RCX: ffffffff816a4d7b RDX: 0000000000000000 RSI: ffffffff8b3d1020 RDI: ffffffff8b3d0fe0 RBP: ffffc900001e0c28 R08: dffffc0000000000 R09: fffffbfff1ce68c6 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c164 R13: dffffc0000000000 R14: ffffffff8cb0a858 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff092ef32d0 CR3: 0000000072b4e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xfa/0x5a0 kernel/locking/lockdep.c:5633 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 debug_object_deactivate+0x63/0x380 lib/debugobjects.c:752 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline] debug_deactivate+0x1d/0x280 kernel/time/hrtimer.c:481 __run_hrtimer kernel/time/hrtimer.c:1654 [inline] __hrtimer_run_queues+0x334/0xe50 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline] RIP: 0010:lock_release+0x173/0xa20 kernel/locking/lockdep.c:5678 Code: 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 8f 7b 77 00 4c 89 6c 24 48 48 c7 84 24 b0 00 00 00 00 00 00 00 9c <8f> 84 24 b0 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 e7 7a 77 00 RSP: 0018:ffffc90003c1f5b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff92000783ece RCX: ffffffff816a73b7 RDX: 0000000000000000 RSI: ffffffff8b3d1020 RDI: ffffffff8b3d0fe0 RBP: ffffc90003c1f6f0 R08: dffffc0000000000 R09: fffffbfff1ce68c6 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000783ec4 R13: ffffffff81ec8858 R14: ffffc90003c1f670 R15: dffffc0000000000 zap_pte_range mm/memory.c:1435 [inline] zap_pmd_range mm/memory.c:1574 [inline] zap_pud_range mm/memory.c:1603 [inline] zap_p4d_range mm/memory.c:1624 [inline] unmap_page_range+0x1b4a/0x2740 mm/memory.c:1645 unmap_vmas+0x48b/0x640 mm/memory.c:1730 exit_mmap+0x252/0x9f0 mm/mmap.c:3227 __mmput+0x115/0x3c0 kernel/fork.c:1199 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x9f6/0x26a0 kernel/exit.c:856 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 __do_sys_exit_group kernel/exit.c:1030 [inline] __se_sys_exit_group kernel/exit.c:1028 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff092e6ff69 Code: Unable to access opcode bytes at 0x7ff092e6ff3f. RSP: 002b:00007ffc903001f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff092e6ff69 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007ff092ef0390 R08: ffffffffffffffb8 R09: 0000000100000000 R10: 0000000100000000 R11: 0000000000000246 R12: 00007ff092ef0390 R13: 0000000000000000 R14: 00007ff092ef2ec0 R15: 00007ff092e40440 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.591 msecs