rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17381/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=73329, q=343 ncpus=2)
task:dhcpcd-run-hook state:R running task stack:27032 pid:17381 tgid:17381 ppid:17360 task_flags:0x400040 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090
irqentry_exit+0x6f/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:89 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x8f/0x2b0 mm/kasan/generic.c:189
Code: 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 0f 85 de 01 00 00 <49> ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd 83 e5 07 0f 84 b5
RSP: 0018:ffffc900048e70e0 EFLAGS: 00000246
RAX: 1ffff9200091ce01 RBX: ffffffffffffffff RCX: ffffffff8171d5f8
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900048e7258
RBP: 0000000000000000 R08: ffffc900048e7267 R09: 1ffff9200091ce4c
R10: dffffc0000000000 R11: fffff5200091ce4c R12: 0000000000000002
R13: ffffc900048e7258 R14: fffff5200091ce4d R15: 1ffff9200091ce4b
__asan_memset+0x22/0x50 mm/kasan/shadow.c:84
unwind_next_frame+0xc98/0x2390 arch/x86/kernel/unwind_orc.c:592
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
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:4147 [inline]
kmem_cache_alloc_bulk_noprof+0x4e0/0x790 mm/slub.c:5371
mt_alloc_bulk lib/maple_tree.c:181 [inline]
mas_dup_alloc lib/maple_tree.c:6642 [inline]
mas_dup_build+0x830/0xfe0 lib/maple_tree.c:6706
__mt_dup+0x137/0x220 lib/maple_tree.c:6770
dup_mmap kernel/fork.c:638 [inline]
dup_mm kernel/fork.c:1734 [inline]
copy_mm+0x674/0x2100 kernel/fork.c:1786
copy_process+0x16d3/0x3b80 kernel/fork.c:2429
kernel_clone+0x224/0x7f0 kernel/fork.c:2844
__do_sys_clone kernel/fork.c:2987 [inline]
__se_sys_clone kernel/fork.c:2971 [inline]
__x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2971
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6f585e636
RSP: 002b:00007ffe7ba57820 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe7ba57828 RCX: 00007ff6f585e636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 000055b75da25e60 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ff6f56c4f50 R11: 0000000000000246 R12: 000055b75da27f70
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10502 jiffies! g73329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27080 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17383 Comm: syz.3.2966 Not tainted 6.15.0-rc6-syzkaller-00025-g627277ba7c23 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:netdev_get_num_tc include/linux/netdevice.h:2597 [inline]
RIP: 0010:taprio_set_budgets+0xa9/0x3b0 net/sched/sch_taprio.c:661
Code: 3c 08 00 74 08 4c 89 e7 e8 84 0d af f8 4d 8b 24 24 49 83 c4 36 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 df 02 00 00 49 0f bf 1c 24 0f b7 f3 31 ff e8 e0 41 4f
RSP: 0018:ffffc90000007c00 EFLAGS: 00000807
RAX: 0000000000000000 RBX: ffff88807de652c0 RCX: dffffc0000000000
RDX: 0000000000010000 RSI: ffff88803223e800 RDI: ffff88807de652c0
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f7c R12: ffff88807b61c036
R13: ffff88807de652c0 R14: ffff88803223e800 R15: ffff88803223f400
FS: 00007fd3603f66c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001bb000 CR3: 000000005ff34000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
advance_sched+0x963/0xc90 net/sched/sch_taprio.c:977
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x108/0x410 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 fb a6 40 f6 e8 86 25 77 f6 fb bf 01 00 00 00 ab ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900046b70a0 EFLAGS: 00000286
RAX: 69fa281cafd99d00 RBX: 0000000000000000 RCX: 69fa281cafd99d00
RDX: 0000000000000007 RSI: ffffffff8d7387c2 RDI: 0000000000000001
RBP: ffffc900046b7140 R08: ffffffff8f7dd277 R09: 1ffffffff1efba4e
R10: dffffc0000000000 R11: fffffbfff1efba4f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920008d6e14
irqentry_exit+0x6f/0x90 kernel/entry/common.c:354
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:__set_page_owner+0x71/0x4a0 mm/page_owner.c:325
Code: 48 c7 44 24 28 7a d0 86 8d 48 c7 44 24 30 c0 eb 28 82 48 8d 4c 24 20 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 08 <4a> 89 04 29 e8 66 04 97 ff e8 01 bb 71 ff 49 89 c6 89 5c 24 04 89
RSP: 0018:ffffc900046b7200 EFLAGS: 00000a06
RAX: f3f3f304f1f1f1f1 RBX: 0000000000140cca RCX: 1ffff920008d6e44
RDX: 0000000000140cca RSI: 0000000000000000 RDI: ffffea0001388d00
RBP: ffffc900046b72b0 R08: ffffffff8f7dd277 R09: 0000000000000000
R10: ffffed1009c46800 R11: fffffbfff1efba4f R12: 0000000000000000
R13: dffffc0000000000 R14: ffffea0001388d00 R15: 0000000000000001
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301
folio_alloc_mpol_noprof mm/mempolicy.c:2320 [inline]
vma_alloc_folio_noprof+0xe4/0x200 mm/mempolicy.c:2355
mfill_atomic_pte_copy+0x8b/0x370 mm/userfaultfd.c:250
mfill_atomic_pte mm/userfaultfd.c:682 [inline]
mfill_atomic mm/userfaultfd.c:812 [inline]
mfill_atomic_copy+0x675/0x1470 mm/userfaultfd.c:865
userfaultfd_copy fs/userfaultfd.c:1614 [inline]
userfaultfd_ioctl+0x29ba/0x4bc0 fs/userfaultfd.c:2031
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd36258e969
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:00007fd3603f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd3627b6160 RCX: 00007fd36258e969
RDX: 0000200000000040 RSI: 00000000c028aa03 RDI: 0000000000000003
RBP: 00007fd362610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd3627b6160 R15: 00007fff2f080e28