------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at kernel/rcu/tree_stall.h:959 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:951 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.18.0-rc3-next-20220422-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:959 Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 80 49 5c 90 e8 0e a1 61 00 b8 01 00 00 00 87 05 03 3d f7 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 f0 d8 8b 48 c7 c3 cc 8c b9 8d 74 58 48 b8 00 00 RSP: 0018:ffffc90000007e40 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 00000000fffffec4 RCX: ffffffff81650c72 RDX: fffffbfff20b8930 RSI: 0000000000000004 RDI: ffffffff905c4980 RBP: ffffffff8bd8f0c0 R08: 0000000000000001 R09: 0000000000000003 R10: fffffbfff20b8930 R11: 1ffff110173875f7 R12: 1ffffffff1741e40 R13: 0000000000000246 R14: 0000000000000009 R15: ffff8880b9c3aed2 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3df0342370 CR3: 00000000231d9000 CR4: 00000000003506f0 DR0: 00000000c757fce9 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: rcu_check_gp_start_stall kernel/rcu/tree_stall.h:922 [inline] rcu_core+0x4df/0x1880 kernel/rcu/tree.c:2913 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:649 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_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:117 [inline] RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:559 Code: 89 de e8 5d 0c 09 f8 84 db 75 ac e8 74 08 09 f8 e8 6f 5a 0f f8 eb 0c e8 68 08 09 f8 0f 00 2d a1 0d c2 00 e8 5c 08 09 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 d7 0a 09 f8 48 85 db RSP: 0018:ffffffff8ba07d38 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffffff8babc880 RSI: ffffffff897116c4 RDI: ffffffff897116b1 RBP: ffff88814078b864 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81807158 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88814078b800 R14: ffff88814078b864 R15: ffff8881452ef004 acpi_idle_enter+0x369/0x510 drivers/acpi/processor_idle.c:696 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x169/0x270 init/main.c:728 arch_call_rest_init+0xf/0x14 init/main.c:885 start_kernel+0x47f/0x4a0 init/main.c:1143 secondary_startup_64_no_verify+0xce/0xdb ---------------- Code disassembly (best guess): 0: 89 de mov %ebx,%esi 2: e8 5d 0c 09 f8 callq 0xf8090c64 7: 84 db test %bl,%bl 9: 75 ac jne 0xffffffb7 b: e8 74 08 09 f8 callq 0xf8090884 10: e8 6f 5a 0f f8 callq 0xf80f5a84 15: eb 0c jmp 0x23 17: e8 68 08 09 f8 callq 0xf8090884 1c: 0f 00 2d a1 0d c2 00 verw 0xc20da1(%rip) # 0xc20dc4 23: e8 5c 08 09 f8 callq 0xf8090884 28: fb sti 29: f4 hlt * 2a: 9c pushfq <-- trapping instruction 2b: 5b pop %rbx 2c: 81 e3 00 02 00 00 and $0x200,%ebx 32: fa cli 33: 31 ff xor %edi,%edi 35: 48 89 de mov %rbx,%rsi 38: e8 d7 0a 09 f8 callq 0xf8090b14 3d: 48 85 db test %rbx,%rbx