rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6903/1:b..l P5482/1:b..l P6844/1:b..l P5631/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=12293, q=583 ncpus=2)
task:dhcpcd state:R running task stack:27224 pid:5631 tgid:5631 ppid:5482 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x41/0x70 kernel/kcov.c:217
Code: a9 00 01 ff 00 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 6c 16 00 00 85 c0 74 2b 8b 82 48 16 00 00 <83> f8 02 75 20 48 8b 8a 50 16 00 00 8b 92 4c 16 00 00 48 8b 01 48
RSP: 0018:ffffc90003557db8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880753b98f8 RCX: ffffffff8240e8f9
RDX: ffff888028978000 RSI: ffffffff8240e67a RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000ffffffff R12: 0000000000000000
R13: 0000000000000003 R14: 000000000000c000 R15: ffff88807bcd6280
fast_dput fs/dcache.c:820 [inline]
dput.part.0+0x6a/0x9b0 fs/dcache.c:906
dput+0x1f/0x30 fs/dcache.c:902
__fput+0x51c/0xb70 fs/file_table.c:476
fput_close_sync+0x118/0x260 fs/file_table.c:573
__do_sys_close fs/open.c:1573 [inline]
__se_sys_close fs/open.c:1558 [inline]
__x64_sys_close+0x8b/0x120 fs/open.c:1558
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f19bd716407
RSP: 002b:00007fffdcf06d60 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f19bd68c740 RCX: 00007f19bd716407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000016
RBP: 00007fffdcf17000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffdcf17000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
task:syz.3.173 state:R running task stack:26104 pid:6844 tgid:6843 ppid:5813 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1885 [inline]
zap_pmd_range mm/memory.c:1947 [inline]
zap_pud_range mm/memory.c:1976 [inline]
zap_p4d_range mm/memory.c:1997 [inline]
unmap_page_range+0xda5/0x4030 mm/memory.c:2018
unmap_single_vma.constprop.0+0x153/0x240 mm/memory.c:2061
unmap_vmas+0x218/0x470 mm/memory.c:2105
exit_mmap+0x1b2/0xb60 mm/mmap.c:1280
__mmput+0x12a/0x410 kernel/fork.c:1130
mmput+0x62/0x70 kernel/fork.c:1153
exit_mm kernel/exit.c:583 [inline]
do_exit+0x7d7/0x2bd0 kernel/exit.c:961
do_group_exit+0xd3/0x2a0 kernel/exit.c:1114
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f816618f749
RSP: 002b:00007f816707b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000200000000000 RBX: 00007f81663e5fa0 RCX: 00007f816618f749
RDX: 0000000003000003 RSI: 0000000000fbe000 RDI: 0000200000000000
RBP: 00007f8166213f91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000004031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81663e6038 R14: 00007f81663e5fa0 R15: 00007fff5e0cde38
task:dhcpcd state:R running task stack:22696 pid:5482 tgid:5482 ppid:5481 task_flags:0x40054c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock kernel/sched/wait.c:127 [inline]
__wake_up+0x3f/0x60 kernel/sched/wait.c:146
sock_def_wakeup+0xe8/0x2c0 net/core/sock.c:3586
unix_release_sock+0xa71/0x1460 net/unix/af_unix.c:711
unix_release+0x91/0xf0 net/unix/af_unix.c:1184
__sock_release+0xb3/0x270 net/socket.c:653
sock_close+0x1c/0x30 net/socket.c:1446
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:973
do_group_exit+0xd3/0x2a0 kernel/exit.c:1114
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f19bd78c822
RSP: 002b:00007fffdcef6768 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 00007f19bd5c2000 RBX: 0000000000000000 RCX: 00007f19bd78c822
RDX: 0000000000000003 RSI: 0000000000009000 RDI: 0000000000000000
RBP: 0000000000020022 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 00007fffdcef6ad0
R13: 00007fffdcef6cc0 R14: 0000000000000000 R15: 0000000000000002
task:syz.0.177 state:R running task stack:27416 pid:6903 tgid:6886 ppid:5812 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
sock_def_readable+0x15b/0x5d0 net/core/sock.c:3611
__netlink_sendskb net/netlink/af_netlink.c:1263 [inline]
netlink_broadcast_deliver net/netlink/af_netlink.c:1399 [inline]
do_one_broadcast net/netlink/af_netlink.c:1488 [inline]
netlink_broadcast_filtered+0xaba/0xf90 net/netlink/af_netlink.c:1533
netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1557
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
kobject_uevent_env+0xc6a/0x1870 lib/kobject_uevent.c:608
device_add+0x10dd/0x1950 drivers/base/core.c:3670
device_create_groups_vargs+0x1f8/0x270 drivers/base/core.c:4371
device_create+0xed/0x130 drivers/base/core.c:4410
bdi_register_va+0x114/0x7f0 mm/backing-dev.c:1099
super_setup_bdi_name+0xff/0x250 fs/super.c:1818
fuse_bdi_init fs/fuse/inode.c:1589 [inline]
fuse_fill_super_common+0x5e5/0x10c0 fs/fuse/inode.c:1865
fuse_fill_super+0x1f2/0x2e0 fs/fuse/inode.c:1946
vfs_get_super fs/super.c:1332 [inline]
get_tree_nodev+0xdd/0x190 fs/super.c:1351
fuse_get_tree+0x271/0x650 fs/fuse/inode.c:2023
vfs_get_tree+0x8e/0x330 fs/super.c:1759
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7bf/0x23a0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f10a638f749
RSP: 002b:00007f10a72c9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f10a65e6180 RCX: 00007f10a638f749
RDX: 0000200000002100 RSI: 00002000000020c0 RDI: 0000000000000000
RBP: 00007f10a6413f91 R08: 00002000000005c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f10a65e6218 R14: 00007f10a65e6180 R15: 00007ffefe4b9548
rcu: rcu_preempt kthread starved for 10612 jiffies! g12293 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:28728 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
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+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6900 Comm: syz.2.181 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline]
RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline]
RIP: 0010:native_apic_msr_write arch/x86/include/asm/apic.h:212 [inline]
RIP: 0010:native_apic_msr_write+0x28/0x40 arch/x86/include/asm/apic.h:206
Code: 90 90 f3 0f 1e fa 8d 87 30 ff ff ff 83 e0 ef 74 20 89 f8 83 e0 ef 83 f8 20 74 16 c1 ef 04 31 d2 89 f0 8d 8f 00 08 00 00 0f 30 <66> 90 e9 51 a2 fe 09 e9 4c a2 fe 09 89 f6 31 d2 89 cf e9 a1 48 71
RSP: 0018:ffffc9001ca077f8 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: 0000000000000001 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000003f
RBP: ffff8880b8531560 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000f288bcf5 R12: 1ffff92003940f04
R13: 1ffff110170a6201 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f63592e66c0(0000) GS:ffff888124a60000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3be005a839 CR3: 00000000564be000 CR4: 00000000003526f0
Call Trace:
__apic_send_IPI_self arch/x86/include/asm/apic.h:459 [inline]
arch_irq_work_raise+0x4f/0x70 arch/x86/kernel/irq_work.c:31
irq_work_raise kernel/irq_work.c:84 [inline]
__irq_work_queue_local+0x1d2/0x550 kernel/irq_work.c:112
irq_work_queue kernel/irq_work.c:124 [inline]
irq_work_queue+0xab/0x100 kernel/irq_work.c:116
bpf_send_signal_common+0x3a4/0x540 kernel/trace/bpf_trace.c:871
____bpf_send_signal kernel/trace/bpf_trace.c:880 [inline]
bpf_send_signal+0x1d/0x30 kernel/trace/bpf_trace.c:878
bpf_prog_0569e9d1ebdddc39+0x23/0x2e
bpf_dispatcher_nop_func include/linux/bpf.h:1376 [inline]
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run3+0x248/0x5d0 kernel/trace/bpf_trace.c:2117
__bpf_trace_mmap_lock_acquire_returned+0xfc/0x140 include/trace/events/mmap_lock.h:47
__traceiter_mmap_lock_acquire_returned+0x7c/0xc0 include/trace/events/mmap_lock.h:47
__do_trace_mmap_lock_acquire_returned include/trace/events/mmap_lock.h:47 [inline]
trace_mmap_lock_acquire_returned+0x134/0x1c0 include/trace/events/mmap_lock.h:47
__mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:42 [inline]
mmap_write_lock_killable include/linux/mmap_lock.h:333 [inline]
do_mremap+0xf79/0x2020 mm/mremap.c:1924
__do_sys_mremap+0x119/0x170 mm/mremap.c:1993
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f635838f749
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:00007f63592e6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007f63585e6090 RCX: 00007f635838f749
RDX: 0000000000002000 RSI: 0000000000002000 RDI: 0000200000ffc000
RBP: 00007f6358413f91 R08: 0000200000fff000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f63585e6128 R14: 00007f63585e6090 R15: 00007fffe5a424e8