rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=cea4/1/0x4000000000000000 softirq=64770/64770 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12471 P12475/1:b..l P9745/1:b..l P9750/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=55777, q=185 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5839 Comm: syz-executor Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4706 [inline]
RIP: 0010:__lock_acquire+0x72e/0xd20 kernel/locking/lockdep.c:5224
Code: 3e 8b 9f e8 0a 00 00 48 85 db 0f 84 81 00 00 00 83 fb 31 0f 83 e0 05 00 00 48 8d 04 9b 45 8b 66 20 48 8b 4c 24 10 8b 44 c1 f8 <44> 31 e0 25 00 60 00 00 31 c9 89 c2 f7 da 48 19 c9 49 09 cf 85 c0
RSP: 0018:ffffc90000a08b30 EFLAGS: 00000083
RAX: 000000000004058a RBX: 0000000000000007 RCX: ffff8880347d46f0
RDX: 0000000000000008 RSI: ffff8880347d4808 RDI: ffff8880347d3c00
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff89865124
R10: dffffc0000000000 R11: ffffffff89865060 R12: 00000000000c4db1
R13: 0000000000000003 R14: ffff8880347d4808 R15: 55a02f63cf1dd83f
FS: 0000555562de3500(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8153784f98 CR3: 0000000075238000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000aa
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0xc4/0xc90 net/sched/sch_taprio.c:924
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d 74 6e fa 0b 48 89 de 5b e9 33 20 55 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 90 9c 92 65 8b 15 58 6a
RSP: 0018:ffffc90003e7f388 EFLAGS: 00000293
RAX: ffffffff822b2fc8 RBX: 0000000000000000 RCX: ffff8880347d3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: ffffea000178ce47 R09: 1ffffd40002f19c8
R10: dffffc0000000000 R11: fffff940002f19c9 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888079ee71e0 R15: dffffc0000000000
__page_table_check_pte_clear mm/page_table_check.c:150 [inline]
__page_table_check_ptes_set+0x1ed/0x2f0 mm/page_table_check.c:207
page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
set_ptes include/linux/pgtable.h:292 [inline]
__copy_present_ptes mm/memory.c:973 [inline]
copy_present_ptes mm/memory.c:1056 [inline]
copy_pte_range mm/memory.c:1179 [inline]
copy_pmd_range+0x4262/0x7000 mm/memory.c:1267
copy_pud_range mm/memory.c:1304 [inline]
copy_p4d_range mm/memory.c:1328 [inline]
copy_page_range+0xc46/0x1270 mm/memory.c:1416
dup_mmap+0xf57/0x1ac0 mm/mmap.c:1838
dup_mm kernel/fork.c:1477 [inline]
copy_mm+0x13c/0x4b0 kernel/fork.c:1529
copy_process+0x16d3/0x3b80 kernel/fork.c:2169
kernel_clone+0x224/0x7f0 kernel/fork.c:2599
__do_sys_clone kernel/fork.c:2742 [inline]
__se_sys_clone kernel/fork.c:2726 [inline]
__x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95df585453
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff2034dfd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f95df585453
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000555562de37d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000005643f R15: 00007fff2034e170
task:kworker/u8:11 state:R running task stack:21944 pid:9750 tgid:9750 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: kvfree_rcu_reclaim kfree_rcu_work
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:deref_stack_reg+0x1a7/0x230 arch/x86/kernel/unwind_orc.c:406
Code: 46 49 8d 40 08 48 39 d8 0f 97 c1 4c 39 f0 0f 96 c0 20 c8 3c 01 75 30 4c 89 c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 <48> 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e3 3b ad 00
RSP: 0018:ffffc9000f03f420 EFLAGS: 00000202
RAX: ffffc9000f03ff48 RBX: ffffc9000f03f588 RCX: 0000000000000001
RDX: ffffc9000f03f588 RSI: dffffc0000000000 RDI: ffffc9000f03fe70
RBP: 1ffff92001e07ea9 R08: ffffc9000f03fe70 R09: 0000000000000000
R10: ffffc9000f03f598 R11: fffff52001e07eb5 R12: 1ffff92001e07eaa
R13: 1ffff92001e07eab R14: ffffc9000f03ff48 R15: dffffc0000000000
unwind_next_frame+0x17c4/0x2390 arch/x86/kernel/unwind_orc.c:-1
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free_freelist_hook mm/slub.c:2410 [inline]
slab_free_bulk mm/slub.c:4667 [inline]
kmem_cache_free_bulk+0x2d1/0x520 mm/slub.c:5246
kfree_bulk include/linux/slab.h:794 [inline]
kvfree_rcu_bulk+0xe5/0x1f0 mm/slab_common.c:1516
kfree_rcu_work+0xed/0x170 mm/slab_common.c:1594
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:9 state:R running task stack:19632 pid:9745 tgid:9745 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 6b 55 fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000efff980 EFLAGS: 00000206
RAX: 01b6694c19d96800 RBX: 0000000000000000 RCX: 01b6694c19d96800
RDX: 0000000000000000 RSI: ffffffff8db6fcc6 RDI: ffffffff8be1ba40
RBP: ffffffff8b345592 R08: 0000000000000000 R09: ffffffff8b345592
R10: dffffc0000000000 R11: ffffffff8b3454c0 R12: 0000000000000002
R13: ffffffff8e13f0e0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xef/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor state:R running task stack:28456 pid:12475 tgid:12475 ppid:5849 task_flags:0x400040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline]
RIP: 0010:lock_release+0x81/0x3e0 kernel/locking/lockdep.c:5884
Code: 84 ad 02 00 00 83 3d 5d 9a 02 0e 00 0f 84 44 02 00 00 65 8b 05 60 85 fe 10 85 c0 0f 85 35 02 00 00 65 4c 8b 3c 25 08 90 9c 92 <41> 83 bf ec 0a 00 00 00 0f 85 1e 02 00 00 49 81 3e 00 43 60 93 0f
RSP: 0018:ffffc900044c76b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff902fd301 RCX: 2c43834b152ece00
RDX: ffffc900044c7801 RSI: ffffffff8be1ba20 RDI: ffffffff8be1b9e0
RBP: dffffc0000000000 R08: ffffc900044c7838 R09: 0000000000000000
R10: ffffc900044c7898 R11: fffff52000898f15 R12: ffffc900044c7848
R13: ffffffff8172aae5 R14: ffffffff8e13f0e0 R15: ffff8880333dbc00
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
__unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4216
__d_alloc+0x31/0x6f0 fs/dcache.c:1690
d_alloc+0x4b/0x190 fs/dcache.c:1769
lookup_one_qstr_excl_raw+0xc8/0x280 fs/namei.c:1685
lookup_one_qstr_excl fs/namei.c:1711 [inline]
filename_create+0x225/0x470 fs/namei.c:4149
do_symlinkat+0xbc/0x3f0 fs/namei.c:4758
__do_sys_symlinkat fs/namei.c:4781 [inline]
__se_sys_symlinkat fs/namei.c:4778 [inline]
__x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4778
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7cc578e167
RSP: 002b:00007ffd22e9f2b8 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7cc578e167
RDX: 00007f7cc58136da RSI: 00000000ffffff9c RDI: 00007ffd22e9f350
RBP: 00007ffd22e9f2fc R08: 0000000000000013 R09: 00007ffd22e9f007
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000021f
R13: 00000000000927c0 R14: 00000000000563e3 R15: 00007ffd22e9f350
task:syz.2.2713 state:R running task stack:25984 pid:12471 tgid:12470 ppid:5845 task_flags:0x400040 flags:0x0000400a
Call Trace:
sched_show_task+0x49d/0x630 kernel/sched/core.c:7754
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:256 [inline]
print_other_cpu_stall+0xfa6/0x1370 kernel/rcu/tree_stall.h:645
check_cpu_stall kernel/rcu/tree_stall.h:821 [inline]
rcu_pending kernel/rcu/tree.c:3642 [inline]
rcu_sched_clock_irq+0x9d1/0x1090 kernel/rcu/tree.c:2677
update_process_times+0x23c/0x2f0 kernel/time/timer.c:2473
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x3a9/0x590 kernel/smp.c:679
Code: 33 44 89 f6 83 e6 01 31 ff e8 f3 89 0b 00 41 83 e6 01 75 11 e8 a8 85 0b 00 4d 89 fe eb 3f e8 9e 85 0b 00 eb 3c 4d 89 fe f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 81 85 0b 00
RSP: 0000:ffffc9001c72e7c0 EFLAGS: 00000246
RAX: ffffffff81b4a03f RBX: ffffc9001c72e808 RCX: 0000000000080000
RDX: ffffc9000c151000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9001c72e8b0 R08: ffffffff8fa0b3f7 R09: 1ffffffff1f4167e
R10: dffffc0000000000 R11: ffffffff81704100 R12: 1ffff920038e5d01
R13: dffffc0000000000 R14: 1ffff920038e5cfc R15: 1ffff920038e5cfc
loaded_vmcs_clear arch/x86/kvm/vmx/vmx.c:820 [inline]
vmx_vcpu_load_vmcs+0x129/0x6b0 arch/x86/kvm/vmx/vmx.c:1460
vmx_vcpu_load+0x93/0x260 arch/x86/kvm/vmx/vmx.c:1518
kvm_arch_vcpu_load+0x285/0xa70 arch/x86/kvm/x86.c:5020
kvm_sched_in+0x7c/0xe0 virt/kvm/kvm_main.c:6344
__fire_sched_in_preempt_notifiers kernel/sched/core.c:4955 [inline]
fire_sched_in_preempt_notifiers kernel/sched/core.c:4961 [inline]
finish_task_switch+0x85d/0x950 kernel/sched/core.c:5275
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x16b2/0x4c90 kernel/sched/core.c:6786
preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7059
preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7f/0xb0 kernel/rcu/tree.c:746
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5882
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
__unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
mmu_memory_cache_alloc_obj virt/kvm/kvm_main.c:356 [inline]
__kvm_mmu_topup_memory_cache+0x1b4/0x610 virt/kvm/kvm_main.c:395
kvm_mmu_load+0x9d/0x21f0 arch/x86/kvm/mmu/mmu.c:5895
kvm_mmu_reload arch/x86/kvm/mmu.h:123 [inline]
vcpu_enter_guest arch/x86/kvm/x86.c:10977 [inline]
vcpu_run+0x4833/0x6f70 arch/x86/kvm/x86.c:11339
kvm_arch_vcpu_ioctl_run+0xfc9/0x1940 arch/x86/kvm/x86.c:11662
kvm_vcpu_ioctl+0x95c/0xe90 virt/kvm/kvm_main.c:4464
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6c0b38ebe9
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:00007f6c0c137038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6c0b5b5fa0 RCX: 00007f6c0b38ebe9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f6c0b411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6c0b5b6038 R14: 00007f6c0b5b5fa0 R15: 00007ffed5c5dfd8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g55777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=20998
rcu: rcu_preempt kthread starved for 10502 jiffies! g55777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27320 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245