rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5280/1:b..l P5620/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=121241, q=703 ncpus=2)
task:syz-executor state:R running task stack:21696 pid:5620 tgid:5620 ppid:5612 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 61 3f 2d 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 4b 8a ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 1b 1b 6e ff cc 48 8d 3d 98 eb b8
RSP: 0018:ffffc90004227078 EFLAGS: 00000286
RAX: 0c6f4cca03b9fa00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000002fa32466 RSI: ffffffff8e4b03b4 RDI: ffffffff8c4bda80
RBP: ffffffff823bc0f8 R08: ffffffff823bc0f8 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
get_non_dying_memcg_start mm/memcontrol.c:817 [inline]
mod_memcg_state+0x64/0x190 mm/memcontrol.c:879
account_kmem_nmi_safe mm/memcontrol.c:3057 [inline]
obj_cgroup_charge_pages mm/memcontrol.c:3101 [inline]
__memcg_kmem_charge_page+0x33c/0x510 mm/memcontrol.c:3141
__alloc_frozen_pages_noprof+0x1be/0x380 mm/page_alloc.c:5321
alloc_pages_mpol+0x212/0x380 mm/mempolicy.c:2490
alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline]
alloc_pages_noprof+0xac/0x2a0 mm/mempolicy.c:2581
pagetable_alloc_noprof include/linux/mm.h:3685 [inline]
pmd_alloc_one_noprof include/asm-generic/pgalloc.h:143 [inline]
__pmd_alloc+0x3a/0x5c0 mm/memory.c:6772
pmd_alloc include/linux/mm.h:3601 [inline]
copy_pmd_range+0x547f/0x5880 mm/memory.c:1388
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0xc26/0x1250 mm/memory.c:1555
dup_mmap+0xf21/0x1d90 mm/mmap.c:1840
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e3e/0x4390 kernel/fork.c:2289
kernel_clone+0x2d7/0x940 kernel/fork.c:2748
__do_sys_clone kernel/fork.c:2889 [inline]
__se_sys_clone kernel/fork.c:2873 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc3031c6912
RSP: 002b:00007ffe45d114a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe45d114a0 RCX: 00007fc3031c6912
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe45d1162c R08: 0000000000000000 R09: 0000000000000001
R10: 0000555583d827d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000158c49 R15: 00007ffe45d11680
task:dhcpcd state:R running task stack:21736 pid:5280 tgid:5280 ppid:5279 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679
RIP: 0010:packet_notifier+0xa07/0xf70 net/packet/af_packet.c:4195
Code: 48 8b 5c 24 08 4c 89 e7 e8 16 32 38 01 48 83 c3 68 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 ec 11 9a f7 48 8b 1b <48> 85 db 0f 84 dc 01 00 00 48 83 c3 98 0f 84 d2 01 00 00 e8 91 86
RSP: 0018:ffffc90002d476e0 EFLAGS: 00000246
RAX: 1ffff1100570bc0d RBX: ffff88802ecf4068 RCX: ffff88801ff88000
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000044
RBP: ffffc90002d477e0 R08: ffff88801ff88000 R09: 0000000000000003
R10: 0000000000000006 R11: 0000000000000000 R12: ffffffff9017d720
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000001
notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2288 [inline]
call_netdevice_notifiers net/core/dev.c:2302 [inline]
__dev_notify_flags+0x1aa/0x310 net/core/dev.c:9793
netif_change_flags+0xde/0x1b0 net/core/dev.c:9822
dev_change_flags+0x128/0x260 net/core/dev_api.c:68
devinet_ioctl+0x966/0x1c50 net/ipv4/devinet.c:1199
inet_ioctl+0x42a/0x560 net/ipv4/af_inet.c:1009
sock_do_ioctl+0x101/0x320 net/socket.c:1300
sock_ioctl+0x57a/0x7e0 net/socket.c:1421
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce7a14d378
RSP: 002b:00007ffc82a644b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000030 RCX: 00007fce7a14d378
RDX: 00007ffc82a746b0 RSI: 0000000000008914 RDI: 0000000000000030
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc82a84850
R13: 00007fce7a04d708 R14: 0000000000000028 R15: 0000000000008914
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g121241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=92804
rcu: rcu_preempt kthread starved for 10502 jiffies! g121241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27304 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 22453 Comm: syz.0.5278 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
RIP: 0010:__lock_acquire+0x9e1/0x2cf0 kernel/locking/lockdep.c:-1
Code: 83 3d a6 85 b5 0e 00 75 13 48 8d 3d a9 e0 b8 0e 48 c7 c6 e0 39 35 8e 67 48 0f b9 3a 90 31 c0 48 83 78 40 00 0f 84 7a 1d 00 00 <41> 8b 45 20 25 ff 1f 00 00 48 0f a3 05 0e 44 d2 12 73 10 48 69 c0
RSP: 0018:ffffc90000007b68 EFLAGS: 00000086
RAX: ffffffff9415cd58 RBX: 0000000023fa41a2 RCX: 00000000686b8d89
RDX: 00000000bbd3c56a RSI: 00000000acaee8ce RDI: ffff88802d451f00
RBP: 07b24d8700000000 R08: ffffffff84de44da R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff9aa4db08 R12: ffff88802d452af0
R13: ffff88802d452af0 R14: ffff88802d451f00 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff888124f55000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feba355da08 CR3: 000000004c3be000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
debug_object_deactivate+0x9a/0x250 lib/debugobjects.c:936
debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline]
__run_hrtimer kernel/time/hrtimer.c:2000 [inline]
__hrtimer_run_queues+0x239/0xa10 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x448/0x910 kernel/time/hrtimer.c:2215
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:deref_stack_reg+0x191/0x220 arch/x86/kernel/unwind_orc.c:422
Code: ca 80 fa 01 75 46 49 8d 40 08 4c 39 e0 0f 97 c1 4c 39 f0 0f 96 c0 20 c8 3c 01 75 30 4c 89 c7 49 89 f7 e8 12 07 00 00 49 89 c6 <48> 8b 5c 24 08 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df
RSP: 0018:ffffc90004406db8 EFLAGS: 00000202
RAX: ffffc90004407980 RBX: 1ffff92000880dd5 RCX: 0000000000000001
RDX: ffffc90004406ee8 RSI: dffffc0000000000 RDI: ffffc90004407830
RBP: ffffc90004400000 R08: ffffc90004407830 R09: ffffc90004406ef8
R10: dffffc0000000000 R11: fffff52000880de1 R12: 1ffff92000880dd6
R13: 1ffff92000880dd7 R14: ffffc90004407980 R15: dffffc0000000000
unwind_next_frame+0x19bd/0x2550 arch/x86/kernel/unwind_orc.c:-1
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
free_unref_folios+0xd84/0x14a0 mm/page_alloc.c:3011
folios_put_refs+0x9e9/0xb30 mm/swap.c:1057
folio_batch_release include/linux/folio_batch.h:101 [inline]
shmem_undo_range+0x4e6/0x15d0 mm/shmem.c:1149
shmem_truncate_range mm/shmem.c:1277 [inline]
shmem_evict_inode+0x280/0xa80 mm/shmem.c:1407
evict+0x624/0xb50 fs/inode.c:825
dentry_kill+0x1b9/0x880 fs/dcache.c:826
finish_dput+0x1a/0x260 fs/dcache.c:1001
__fput+0x675/0xa50 fs/file_table.c:520
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x73a/0x2360 kernel/exit.c:1009
do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
get_signal+0x121b/0x12c0 kernel/signal.c:3046
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 kernel/entry/common.c:101 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x2ba/0x8f0 kernel/entry/common.c:165
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fc30319dea1
Code: Unable to access opcode bytes at 0x7fc30319de77.
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fc303426090 RCX: 00007fc30319de99
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fc303233eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fc303426128 R14: 00007fc303426090 R15: 00007ffe45d11288