rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=04fc/1/0x4000000000000000 softirq=20314/20317 fqs=3
rcu: 	(detected by 1, t=10506 jiffies, g=21045, q=969 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6673 Comm: syz.2.227 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5651 [inline]
RIP: 0010:lock_is_held_type+0x61/0x150 kernel/locking/lockdep.c:6016
Code: 41 83 bd a4 0b 00 00 00 0f 85 bf 00 00 00 89 f5 49 89 fe 9c 41 5c fa 48 c7 c7 ce 45 48 8e e8 86 1c 00 00 65 ff 05 27 8c ad 08 <41> 83 bd a0 0b 00 00 00 7e 48 4c 89 eb 48 81 c3 b0 0b 00 00 45 31
RSP: 0018:ffffc90000007d50 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000001000002
RDX: 0000000001000001 RSI: ffffffff8e4845ce RDI: ffffffff8c6ddc80
RBP: 00000000ffffffff R08: 0000000001000001 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000fa8 R12: 0000000000000046
R13: ffff88802e975dc0 R14: ffff8880b8428298 R15: 0000000000000000
FS:  00007f8d965f66c0(0000) GS:ffff888123abf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33712ff8 CR3: 00000000765fa000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 enqueue_hrtimer+0x79/0x2c0 kernel/time/hrtimer.c:1134
 __run_hrtimer kernel/time/hrtimer.c:2090 [inline]
 __hrtimer_run_queues+0x4ce/0xa10 kernel/time/hrtimer.c:2131
 hrtimer_interrupt+0x4cd/0xaa0 kernel/time/hrtimer.c:2250
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221
Code: f7 e8 8d 90 b8 f5 f7 c3 00 02 00 00 74 05 e8 a0 df e4 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 84 8d a9 f5 65 48 8b 05 2c 8f aa 08 48 85 c0 74 18 5b 41 5e e9
RSP: 0018:ffffc9000ec1fc08 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 8000000000000001
RDX: 0000000000000007 RSI: ffffffff8e469cbb RDI: 0000000000000001
RBP: ffffc9000ec1fd30 R08: ffffffff917a757f R09: 1ffffffff22f4eaf
R10: dffffc0000000000 R11: fffffbfff22f4eb0 R12: 00000022d7f5f85a
R13: dffffc0000000000 R14: ffff8880b8428280 R15: 0000000000000180
 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:596 [inline]
 clock_was_set+0x6b4/0x890 kernel/time/hrtimer.c:1000
 do_settimeofday64+0x34e/0x590 kernel/time/timekeeping.c:1730
 __do_sys_clock_settime kernel/time/posix-timers.c:1139 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1123 [inline]
 __x64_sys_clock_settime+0x253/0x2a0 kernel/time/posix-timers.c:1123
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d9839e559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d965f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f8d98626090 RCX: 00007f8d9839e559
RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000000000000000
RBP: 00007f8d98435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8d98626128 R14: 00007f8d98626090 R15: 00007ffcc43bc748
 </TASK>
rcu: rcu_preempt kthread starved for 10490 jiffies! g21045 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27656 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7376
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 0b 8b 02 e9 1e 7f 27 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 c5 20 00 fb f4 <e9> f7 7e 27 f5 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197e40 EFLAGS: 00000242
RAX: 00000000002cdb5b RBX: ffffffff819bee00 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e469cbb RDI: ffffffff8c6ddc80
RBP: ffffc90000197f10 R08: ffff8880b8533a1b R09: 1ffff110170a6743
R10: dffffc0000000000 R11: ffffed10170a6744 R12: 0000000000000000
R13: 1ffff11003e57000 R14: 1ffff92000032fd0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888123bbf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a06427dac CR3: 00000000765fa000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x2e0/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x157
 </TASK>