rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...0: (2 ticks this GP) idle=034c/0/0x1 softirq=8058/8058 fqs=4613 (detected by 1, t=10502 jiffies, g=7249, q=170897 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0xe1/0x490 kernel/locking/lockdep.c:5633 Code: ad 9b 0c 0f 83 8c 01 00 00 45 89 f4 41 c1 ee 06 4a 8d 3c f5 e8 81 fe 8d be 08 00 00 00 e8 c7 61 6f 00 4c 0f a3 25 67 ab 9b 0c <73> 0d e8 d8 1b 08 00 84 c0 0f 84 18 02 00 00 48 c7 c0 a4 b6 fe 8d RSP: 0018:ffffc90000007ae0 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8162d679 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8dfe81e8 RBP: ffffc90000007be8 R08: dffffc0000000000 R09: fffffbfff1bfd03e R10: fffffbfff1bfd03e R11: 1ffffffff1bfd03d R12: 0000000000000000 R13: 1ffff92000000f68 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e9813ae680 CR3: 000000000c68e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162 debug_object_deactivate+0x63/0x340 lib/debugobjects.c:753 debug_hrtimer_deactivate kernel/time/hrtimer.c:416 [inline] debug_deactivate+0x29/0x240 kernel/time/hrtimer.c:472 __run_hrtimer kernel/time/hrtimer.c:1659 [inline] __hrtimer_run_queues+0x2d0/0xc80 kernel/time/hrtimer.c:1755 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1817 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline] __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:736 Code: 48 89 df e8 67 3a b9 f7 e9 4c ff ff ff e8 4d 14 f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d b7 a2 4d 00 fb f4 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48 RSP: 0018:ffffffff8c607d88 EFLAGS: 000002c6 RAX: 5b60601f1735be00 RBX: ffffffff8a1900d7 RCX: 5b60601f1735be00 RDX: 0000000000000001 RSI: ffffffff8a6bfe00 RDI: ffffffff8abf0da0 RBP: ffffffff8c607ec0 R08: dffffc0000000000 R09: ffffed10171c6aee R10: ffffed10171c6aee R11: 1ffff110171c6aed R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8c6bc680 R15: 1ffffffff1bfd07e default_idle_call+0x84/0xc0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1fc/0x570 kernel/sched/idle.c:303 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401 rest_init+0x2dc/0x300 init/main.c:733 arch_call_rest_init+0xa/0xa init/main.c:893 start_kernel+0x490/0x539 init/main.c:1140 secondary_startup_64_no_verify+0xcf/0xdb