sched: DL replenish lagged too much
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=4e3c/1/0x4000000000000000 softirq=30079/30080 fqs=5
rcu: (detected by 1, t=10502 jiffies, g=24153, q=138 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5884 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: rcu_gp srcu_invoke_callbacks
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:__lock_acquire+0x47f/0x1ce0 kernel/locking/lockdep.c:5207
Code: 90 e8 55 f8 05 03 0f b6 54 24 18 85 c0 74 0e 8b 05 b6 23 c8 0e 85 c0 0f 84 df 05 00 00 90 31 c9 e9 7f fe ff ff 48 63 44 24 10 <48> 0f a3 05 49 23 e9 13 0f 82 79 ff ff ff 90 e8 1d f8 05 03 85 c0
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000046
RAX: 0000000000000072 RBX: ffff888079745430 RCX: 0000000000000008
RDX: 0000000000000000 RSI: ffff888079745480 RDI: ffff888079744900
RBP: 0000000000000000 R08: 0000000000080000 R09: 0000000000000001
R10: 0000000000000050 R11: 0000000000000001 R12: ffff888079745480
R13: ffff888079744900 R14: 0000000000000002 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff888124e85000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004ce68000 CR4: 00000000003526f0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1781 [inline]
__hrtimer_run_queues+0x2bc/0xad0 kernel/time/hrtimer.c:1841
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
__sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1058
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__local_bh_enable_ip+0xac/0x120 kernel/softirq.c:457
Code: 1d 19 e7 fd 11 65 8b 05 12 e7 fd 11 a9 00 ff ff 00 74 4d bf 01 00 00 00 e8 e1 f2 0b 00 e8 ec 5f 47 00 fb 65 8b 05 f4 e6 fd 11 <85> c0 74 52 5b 5d e9 19 06 d3 09 65 8b 05 3e 25 fe 11 85 c0 75 9e
RSP: 0018:ffffc900043a7b70 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 00000000fffffe01 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8d820d97 RDI: ffffffff8bd011c0
RBP: ffffffff81a01652 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff905f3597 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffc900043a7bc8 R14: ffffc9000c3cfab8 R15: ffffc9000c3cfab0
local_bh_enable include/linux/bottom_half.h:33 [inline]
srcu_invoke_callbacks+0x2f7/0x4a0 kernel/rcu/srcutree.c:1808
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c2/0x780 kernel/kthread.c:463
ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread starved for 10491 jiffies! g24153 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:28232 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c2/0x780 kernel/kthread.c:463
ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 8446 Comm: syz.0.688 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x20 kernel/kcov.c:314
Code: bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc9000ffbf3e8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b8642800 RCX: ffffffff81af2a21
RDX: 0000000000080000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffed10170c8501 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f20424cc6c0(0000) GS:ffff888124f85000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2fec9e CR3: 000000004ce68000 CR4: 00000000003526f0
Call Trace:
csd_lock_wait kernel/smp.c:342 [inline]
smp_call_function_many_cond+0xe21/0x1600 kernel/smp.c:877
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x4a0/0x17a0 arch/x86/mm/tlb.c:1451
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline]
tlb_flush_mmu mm/mmu_gather.c:403 [inline]
tlb_finish_mmu+0x3c9/0x7c0 mm/mmu_gather.c:497
vms_clear_ptes+0x55e/0x770 mm/vma.c:1235
vms_clean_up_area mm/vma.c:1247 [inline]
__mmap_prepare mm/vma.c:2396 [inline]
__mmap_region+0x5df/0x27a0 mm/vma.c:2652
mmap_region+0x1ab/0x3f0 mm/vma.c:2740
do_mmap+0xa3e/0x1210 mm/mmap.c:558
vm_mmap_pgoff+0x29e/0x470 mm/util.c:580
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:604
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f204158eec9
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:00007f20424cc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f20417e6090 RCX: 00007f204158eec9
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f2041611f91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20417e6128 R14: 00007f20417e6090 R15: 00007ffe4a41a2c8