rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5596/1:b..l P15086/1:b..l P48/1:b..l P21341/3:b..l
rcu: (detected by 1, t=10502 jiffies, g=142733, q=601 ncpus=2)
task:dhcpcd-run-hook state:R running task stack:27688 pid:21341 tgid:21341 ppid:21300 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7370
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:190
spin_unlock include/linux/spinlock.h:390 [inline]
filemap_map_pages+0x15ac/0x2140 mm/filemap.c:3942
do_fault_around mm/memory.c:5851 [inline]
do_read_fault mm/memory.c:5884 [inline]
do_fault+0x985/0x1750 mm/memory.c:6027
do_pte_missing mm/memory.c:4550 [inline]
handle_pte_fault mm/memory.c:6411 [inline]
__handle_mm_fault+0x187d/0x2a00 mm/memory.c:6549
handle_mm_fault+0x36d/0xa20 mm/memory.c:6718
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fe2d6ac32a0
RSP: 002b:00007ffe2c2909c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007ffe2c2909e8 RCX: 00007fe2d6b04670
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 00007fe2d6c05b60
RBP: 0000000000000000 R08: 0000000000000000 R09: 3c00000040001201
R10: 00007fe2d696af50 R11: 0000000000000246 R12: 000055c12a5834d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
task:kworker/u8:3 state:R running task stack:23496 pid:48 tgid:48 ppid:2 task_flags:0x4208160 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x23/0x310 kernel/locking/lockdep.c:5879
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 54 55 53 48 89 fb 48 83 ec 18 65 48 8b 2d 3d 38 26 12 48 89 6c 24 10 48 89 f5 <0f> 1f 44 00 00 65 8b 05 55 38 26 12 83 f8 07 0f 87 63 02 00 00 48
RSP: 0018:ffffc90000b972a0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffffffff8e7e54e0 RCX: ffffffff9177e601
RDX: 0000000000000000 RSI: ffffffff81b7c1ae RDI: ffffffff8e7e54e0
RBP: ffffffff81b7c1ae R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000000cec2 R12: ffffc90000b973a8
R13: ffffc90000b97358 R14: ffffc90000b97db0 R15: ffffc90000b9738c
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5295 [inline]
__kmalloc_noprof+0x301/0x850 mm/slub.c:5307
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
ieee802_11_parse_elems_full+0x177/0x3720 net/mac80211/parse.c:1051
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2518 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1565 [inline]
ieee80211_ibss_rx_queued_mgmt+0xc8d/0x2f80 net/mac80211/ibss.c:1596
ieee80211_iface_process_skb net/mac80211/iface.c:1795 [inline]
ieee80211_iface_work+0xbff/0x13e0 net/mac80211/iface.c:1849
cfg80211_wiphy_work+0x410/0x570 net/wireless/core.c:513
process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
process_scheduled_works kernel/workqueue.c:3385 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3466
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:0 state:R running task stack:22344 pid:15086 tgid:15086 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5893
Code: ff 65 0f c1 05 5b 7e 26 12 83 f8 01 0f 85 28 01 00 00 9c 58 f6 c4 02 0f 85 13 01 00 00 41 f7 c6 00 02 00 00 0f 85 c0 00 00 00 <48> 8b 44 24 10 65 48 2b 05 ad 36 26 12 0f 85 4e 01 00 00 48 83 c4
RSP: 0018:ffffc90006bef2a0 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e7e54e0 RCX: ffffc90006bef2ac
RDX: 0000000000000003 RSI: ffffffff8defabb7 RDI: ffffffff8c1c3780
RBP: ffffffff81b7c1ae R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000001761c R12: ffff88803288ca00
R13: ffffc90006bef358 R14: 0000000000000202 R15: 0000000000000004
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5295 [inline]
__kmalloc_noprof+0x301/0x850 mm/slub.c:5307
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
ieee802_11_parse_elems_full+0x177/0x3720 net/mac80211/parse.c:1051
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2518 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1565 [inline]
ieee80211_ibss_rx_queued_mgmt+0xc8d/0x2f80 net/mac80211/ibss.c:1596
ieee80211_iface_process_skb net/mac80211/iface.c:1795 [inline]
ieee80211_iface_work+0xbff/0x13e0 net/mac80211/iface.c:1849
cfg80211_wiphy_work+0x410/0x570 net/wireless/core.c:513
process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
process_scheduled_works kernel/workqueue.c:3385 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3466
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor state:R running task stack:22640 pid:5596 tgid:5596 ppid:5595 task_flags:0x400100 flags:0x00080800
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:spin_lock include/linux/spinlock.h:342 [inline]
RIP: 0010:pte_offset_map_lock+0x107/0x320 mm/pgtable-generic.c:404
Code: 4c 03 3d 0c 8e bb 0b 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 28 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 de 01 00 00 4d 8b 7f 28 <4c> 89 ff e8 f1 da 2b 09 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48
RSP: 0018:ffffc90003b3fa40 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000072f71067 RCX: ffffffff8261223e
RDX: 1ffffd4000397b8d RSI: ffffffff8261211e RDI: ffffea0001cbdc68
RBP: ffff88807cc5a170 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888072f71878
R13: 1ffff92000767f4a R14: ffffc90003b3fdb8 R15: ffff88807cce1ea0
finish_mkwrite_fault+0xe9/0x300 mm/memory.c:4008
wp_page_shared mm/memory.c:4075 [inline]
do_wp_page+0xabb/0x4350 mm/memory.c:4288
handle_pte_fault mm/memory.c:6427 [inline]
__handle_mm_fault+0x1ab6/0x2a00 mm/memory.c:6549
handle_mm_fault+0x36d/0xa20 mm/memory.c:6718
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fa0c7c7b3e7
RSP: 002b:00007fff28e89430 EFLAGS: 00010202
RAX: 00007fa0c5d0c000 RBX: 000055555c555910 RCX: 0000000000000004
RDX: 0000000000001c20 RSI: 000055555c54ff50 RDI: 0000000000000010
RBP: 00007fff28e89930 R08: 000000000000009b R09: 000055555c54ff60
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff28e89770
R13: 00007fff28e89560 R14: 585858582e7a7973 R15: 00007fff28e894b0
rcu: rcu_preempt kthread starved for 10495 jiffies! g142733 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:28704 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:add_timer+0x62/0x90 kernel/time/timer.c:1249
Code: 7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 37 48 8b 73 10 48 89 df ba 04 00 00 00 e8 3e f2 ff ff b9 79 14 00 5b c3 cc cc cc cc e8 ae 79 14 00 90 0f 0b 90 e8 a5
RSP: 0018:ffffc90000157ba0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffc90000157bd0 RCX: fffff5200002af59
RDX: ffff88801e2b8000 RSI: ffffffff81f40fae RDI: 0000000000000001
RBP: 1ffff9200002af76 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000157bd0
R13: 1ffffffff1c81e50 R14: ffff88801e2b8000 R15: dffffc0000000000
schedule_timeout+0x122/0x280 kernel/time/sleep_timeout.c:98
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 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: 21342 Comm: syz.5.3646 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4897 [inline]
RIP: 0010:__lock_acquire+0x31d/0x2630 kernel/locking/lockdep.c:5187
Code: 45 89 ce 49 89 c1 eb 42 48 8d 04 80 48 8d 04 80 48 8d 34 c5 60 7b 11 96 0f b6 86 c4 00 00 00 84 c0 74 12 41 38 c7 44 0f 47 f8 <80> be c6 00 00 00 02 44 0f 44 f8 41 83 c6 01 48 83 c3 28 44 3b b5
RSP: 0018:ffffc90000007c40 EFLAGS: 00000046
RAX: 0000000000000002 RBX: ffff888027f655b8 RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffffffff9611d2e0 RDI: 0000000000000040
RBP: ffff888027f64a00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: ffff888027f655e0
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002
FS: 00007f453a50c6c0(0000) GS:ffff888124375000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f453a50bff8 CR3: 000000003cdce000 CR4: 00000000003526f0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
debug_object_deactivate+0x135/0x3b0 lib/debugobjects.c:890
debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline]
__run_hrtimer kernel/time/hrtimer.c:1898 [inline]
__hrtimer_run_queues+0x2f0/0xa00 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:write_comp_data+0x3a/0x90 kernel/kcov.c:246
Code: 65 48 8b 3d f0 23 02 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 c3 cc cc cc cc 8b 87 cc 16 00 00 85 c0 74 f1 <8b> 87 a8 16 00 00 83 f8 03 75 e6 48 8b 87 b0 16 00 00 8b bf ac 16
RSP: 0018:ffffc90006effb08 EFLAGS: 00000246
RAX: 0000000080000001 RBX: 0000000000000001 RCX: ffffffff81fbfea8
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888027f64a00
RBP: ffffffff81f49cab R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000324 R12: 0000000000000001
R13: ffff8880b853c580 R14: ffff8880b853c501 R15: 0000000000000000
trace_ipi_send_cpu.constprop.0+0x68/0x230 include/trace/events/ipi.h:10
send_call_function_single_ipi kernel/smp.c:118 [inline]
smp_call_function_many_cond+0x136f/0x1700 kernel/smp.c:872
clock_was_set+0x62b/0x870 kernel/time/hrtimer.c:999
do_settimeofday64+0x330/0x4d0 kernel/time/timekeeping.c:1603
do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
__do_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1108 [inline]
__x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1108
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f453959cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f453a50c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f4539816090 RCX: 00007f453959cdd9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f4539632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4539816128 R14: 00007f4539816090 R15: 00007fff1ce25c18