rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...0: (1 GPs behind) idle=056c/1/0x4000000000000000 softirq=77900/77901 fqs=2054 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 0 0 0 ==> 52500(ms) rcu: (detected by 1, t=10505 jiffies, g=69485, q=5231 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 23626 Comm: syz.7.4410 Not tainted 6.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:debug_lockdep_rcu_enabled+0x2d/0x40 kernel/rcu/update.c:320 Code: fa 31 c0 83 3d 37 48 57 04 00 74 1e 83 3d ca 79 57 04 00 74 15 65 48 8b 0c 25 80 d4 03 00 31 c0 83 b9 dc 0a 00 00 00 0f 94 c0 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 RSP: 0018:ffffc90000007c68 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffffffff89c60812 RCX: ffff88805e3a3c00 RDX: dffffc0000000000 RSI: ffffffff8c0aaa40 RDI: ffffffff8c5edde0 RBP: ffff8880361fd8c8 R08: ffffffff94271887 R09: 1ffffffff284e310 R10: dffffc0000000000 R11: fffffbfff284e311 R12: dffffc0000000000 R13: ffff8880361fd808 R14: ffff8880361fd800 R15: ffff88804c71e360 FS: 00007fd4c18316c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c265c25 CR3: 00000000634ac000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:850 [inline] advance_sched+0xa27/0xca0 net/sched/sch_taprio.c:985 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0a 09 b7 f5 48 89 df e8 42 50 b8 f5 e8 7d 5e e3 f5 fb bf 01 00 00 00 62 b5 a9 f5 65 8b 05 e3 06 40 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc9000572fd00 EFLAGS: 00000286 RAX: 2c22de1721165400 RBX: ffff888021ece088 RCX: ffffffff9a378903 RDX: dffffc0000000000 RSI: ffffffff8c0a9840 RDI: 0000000000000001 RBP: 00000000ffffff83 R08: ffffffff901858f7 R09: 1ffffffff2030b1e R10: dffffc0000000000 R11: fffffbfff2030b1f R12: ffff888021ece000 R13: 7fffffffffffffff R14: 0000000000000003 R15: ffff888021ece080 spin_unlock_irq include/linux/spinlock.h:401 [inline] do_timerfd_settime+0xccf/0xfb0 fs/timerfd.c:523 __do_sys_timerfd_settime fs/timerfd.c:569 [inline] __se_sys_timerfd_settime fs/timerfd.c:560 [inline] __x64_sys_timerfd_settime+0x16f/0x220 fs/timerfd.c:560 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4c0985d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd4c1831038 EFLAGS: 00000246 ORIG_RAX: 000000000000011e RAX: ffffffffffffffda RBX: 00007fd4c0b75fa0 RCX: 00007fd4c0985d29 RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 00007fd4c0a01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd4c0b75fa0 R15: 00007ffe95272af8