Adjusting tsc more than 11% (7703836 vs 7601117)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=ac9c/1/0x4000000000000000 softirq=36126/36127 fqs=5
rcu: (detected by 0, t=10502 jiffies, g=39581, q=451 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5756 Comm: kworker/1:5 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events_freezable_pwr_efficient sync_hw_clock
RIP: 0010:kasan_check_range+0xd/0x2c0 mm/kasan/generic.c:199
Code: 8e e8 87 4b f0 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 <53> b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d 04 37 49 39 f8 0f 82 36
RSP: 0018:ffffc90000a18bf0 EFLAGS: 00000082
RAX: 00000000ffffffff RBX: ffffffff9ac78840 RCX: ffffffff81a3ebec
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9ac78840
RBP: ffffc90000a18ce0 R08: ffffffff84eb1de7 R09: 0000000000000001
R10: dffffc0000000000 R11: fffff520001431a6 R12: 1ffff92000143188
R13: ffffffff9ac78848 R14: dffffc0000000000 R15: 1ffffffff358f109
FS: 0000000000000000(0000) GS:ffff888124dc8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34c09ee0 CR3: 0000000055541000 CR4: 0000000000350ef0
Call Trace:
instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:112 [inline]
do_raw_spin_lock+0x11c/0x2f0 kernel/locking/spinlock_debug.c:116
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:156 [inline]
_raw_spin_lock_irqsave+0x4c/0x60 kernel/locking/spinlock.c:181
debug_object_activate+0xb7/0x420 lib/debugobjects.c:873
debug_hrtimer_activate kernel/time/hrtimer.c:486 [inline]
debug_activate kernel/time/hrtimer.c:529 [inline]
enqueue_hrtimer+0xa9/0x2c0 kernel/time/hrtimer.c:1136
__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
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 dd 8f ba f5 f7 c3 00 02 00 00 74 05 e8 80 da e6 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 14 8d ab f5 65 48 8b 05 4c 20 ac 07 48 85 c0 74 18 5b 41 5e e9
RSP: 0018:ffffc900049b7988 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 8000000000000001
RDX: 0000000000000006 RSI: ffffffff8e415fcc RDI: 0000000000000001
RBP: ffffc900049b7ad0 R08: ffffffff907a627f R09: 1ffffffff20f4c4f
R10: dffffc0000000000 R11: fffffbfff20f4c50 R12: dffffc0000000000
R13: 1ffff92000936f38 R14: ffff8880b8728280 R15: 00000000fffffff5
hrtimer_start include/linux/hrtimer.h:222 [inline]
sched_sync_hw_clock kernel/time/ntp.c:757 [inline]
sync_hw_clock+0x3ae/0x4c0 kernel/time/ntp.c:907
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
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
rcu: rcu_preempt kthread starved for 10492 jiffies! g39581 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
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:28152 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
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
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 9055 Comm: syz.5.800 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:csd_lock_wait kernel/smp.c:363 [inline]
RIP: 0010:csd_lock kernel/smp.c:396 [inline]
RIP: 0010:smp_call_function_many_cond+0x628/0x1500 kernel/smp.c:944
Code: 00 44 8b 3b 44 89 fe 83 e6 01 31 ff e8 31 56 0c 00 41 83 e7 01 75 07 e8 26 51 0c 00 eb 3f f3 90 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 04 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 02 51 0c 00
RSP: 0018:ffffc900033f7460 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: ffff8880b87414c8 RCX: ffff888029883e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900033f75b0 R08: ffff88802988541f R09: 1ffff11005310a83
R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff110170e8299
R13: 0000000000000001 R14: ffff8880b87414c0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888124cc8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000004b6030 CR3: 000000005b121000 CR4: 0000000000350ef0
Call Trace:
__flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x8ff/0x1090 arch/x86/mm/tlb.c:1435
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline]
tlb_flush_mmu+0x1af/0xa30 mm/mmu_gather.c:423
tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:549
exit_mmap+0x4b2/0x9f0 mm/mmap.c:1328
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f252339e159
Code: Unable to access opcode bytes at 0x7f252339e12f.
RSP: 002b:00007f25242f50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f2523625fa8 RCX: 00007f252339e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2523625fa8
RBP: 00007f2523625fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2523626038 R14: 00007ffe5c37f670 R15: 00007ffe5c37f758