syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=493c/1/0x4000000000000000 softirq=19518/19519 fqs=1
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5917/1:b..l

rcu: 	(detected by 1, t=10502 jiffies, g=12797, q=794 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5993 Comm: udevd Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:io_serial_out+0x7c/0xc0 drivers/tty/serial/8250/8250_port.c:416
Code: ce 78 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 9c 51 dc fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90000006970 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f9 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff85477f60 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff99dc9760 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8f5ec3e80 CR3: 000000000df38000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 serial_out drivers/tty/serial/8250/8250.h:142 [inline]
 serial8250_clear_IER drivers/tty/serial/8250/8250_port.c:-1 [inline]
 serial8250_console_write+0x5ef/0x1ba0 drivers/tty/serial/8250/8250_port.c:3421
 console_emit_next_record kernel/printk/printk.c:3138 [inline]
 console_flush_all+0x725/0xc40 kernel/printk/printk.c:3226
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xc4/0x270 kernel/printk/printk.c:3325
 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450
 _printk+0xcf/0x120 kernel/printk/printk.c:2475
 print_task kernel/sched/debug.c:772 [inline]
 print_rq kernel/sched/debug.c:807 [inline]
 print_cpu+0xe2d/0x22f0 kernel/sched/debug.c:1000
 sysrq_sched_debug_show+0x73/0x90 kernel/sched/debug.c:1084
 show_state_filter+0x23a/0x2b0 kernel/sched/core.c:7802
 kbd_keycode drivers/tty/vt/keyboard.c:1515 [inline]
 kbd_event+0x2bdd/0x3ec0 drivers/tty/vt/keyboard.c:1534
 input_handle_events_default+0xd1/0x1a0 drivers/input/input.c:2575
 input_pass_values+0x288/0x890 drivers/input/input.c:127
 input_event_dispose+0x330/0x6b0 drivers/input/input.c:341
 input_event+0x8c/0xc0 drivers/input/input.c:395
 input_sync include/linux/input.h:464 [inline]
 hidinput_report_event+0xa1/0x100 drivers/hid/hid-input.c:1733
 hid_report_raw_event+0x148b/0x16d0 drivers/hid/hid-core.c:2059
 __hid_input_report drivers/hid/hid-core.c:2122 [inline]
 hid_input_report+0x43e/0x520 drivers/hid/hid-core.c:2144
 hid_irq_in+0x47e/0x6d0 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x417/0x690 drivers/usb/core/hcd.c:1650
 dummy_timer+0x862/0x4550 drivers/usb/gadget/udc/dummy_hcd.c:1995
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:64 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:130 [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+0x6b/0x2c0 mm/kasan/generic.c:189
Code: 00 ff f3 0f 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 <49> c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d
RSP: 0018:ffffc90003dff160 EFLAGS: 00000286
RAX: 1ffff920007bfe01 RBX: 0000000000000010 RCX: ffffffff817296e8
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90003dff2d8
RBP: 0000000000000000 R08: ffffc90003dff2e7 R09: ffffc90003dff2e7
R10: dffffc0000000000 R11: fffff520007bfe5b R12: ffffc90003dfff58
R13: ffffc90003dff2d8 R14: ffffc90003dff2d8 R15: 1ffff920007bfe5b
 __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
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1248 [inline]
 free_unref_folios+0xc66/0x14d0 mm/page_alloc.c:2763
 folios_put_refs+0x559/0x640 mm/swap.c:992
 free_pages_and_swap_cache+0x277/0x520 mm/swap_state.c:264
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497
 exit_mmap+0x44c/0xb50 mm/mmap.c:1297
 __mmput+0x118/0x420 kernel/fork.c:1121
 exit_mm+0x1da/0x2c0 kernel/exit.c:581
 do_exit+0x648/0x22e0 kernel/exit.c:952
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1105
 __do_sys_exit_group kernel/exit.c:1116 [inline]
 __se_sys_exit_group kernel/exit.c:1114 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1114
 x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7fe8f56f16c5
Code: Unable to access opcode bytes at 0x7fe8f56f169b.
RSP: 002b:00007fff9b5e8618 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000557c679a91c0 RCX: 00007fe8f56f16c5
RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
RBP: 0000557c67986910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9b5e8660 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:kworker/u8:1    state:R
 I
  running task     stack:24392 pid:5917  tgid:5917  ppid:2      task_flags:0x4208060 flags:0x00004000
 kworker/R-tls-s  3167     11212.622935   E       11212.638749           1.400000         0.104541         2     100 
Workqueue: ipv6_addrconf addrconf_dad_work
        0.000000         0.000000         0.000000

   0      0
Call Trace:
        /
 <TASK>

 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
 I
 kworker/R-ipv6_  3169     11215.043373   E       11215.059199           1.400000         0.099772         2     100 
        0.000000         0.000000         0.000000
   0      0
        /

 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108
 I
 kworker/R-krxrp  3382     11375.004811   E       11375.020962           1.400000         0.000000         2     100 
        0.000000         0.000000         0.000000
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
   0      0
 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 0b dd fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
 I
RSP: 0018:ffffc9000523ef38 EFLAGS: 00000206
 kworker/R-kkcmd  3386     11391.754552   E       11391.770408           1.400000         0.098860         2     100 

        0.000000         0.000000         0.000000
RAX: 8dd9b333a4f60c00 RBX: 0000000000000000 RCX: 8dd9b333a4f60c00
   0      0
RDX: 0000000000000000 RSI: ffffffff8db6ee30 RDI: ffffffff8be28cc0
        /
RBP: ffffffff81728af5 R08: 0000000000000000 R09: ffffffff81728af5

R10: ffffc9000523f0f8 R11: ffffffff81ace6d0 R12: 0000000000000002
 I
R13: ffffffff8e13ee20 R14: 0000000000000000 R15: 0000000000000246
 kworker/R-krdsd  3388     11452.685863   E       11452.701676           1.400000         0.115363         2     100 
        0.000000         0.000000         0.000000
   0      0
        /

 R
    kworker/u8:9  3517     59568.212123   E       59569.612123           1.400000     55162.793945      1434     120 
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
        0.000000         0.000000         0.000000
   0      0
        /

 I
 kworker/R-zswap  5145     12516.243714   E       12516.259518           1.400000         0.121179         2     100 
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
        0.000000         0.000000         0.000000
   0      0
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
        /

 I
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kworker/R-kafs_  5148     12807.948861   E       12807.964713           1.400000         0.093026         2     100 
        0.000000         0.000000         0.000000
   0      0
        /

 R
     jbd2/sda1-8  5162     59685.704746   E       59687.104746           1.400000        22.228596        54     120 
        0.000000         0.000000         0.000000
   0      0
        /

 I
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 kworker/R-ext4-  5163     12869.218606   E       12869.234424           1.400000         0.089880         2     100 
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
        0.000000         0.000000         0.000000
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4745
   0      0
 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087
        /
 skb_release_all net/core/skbuff.c:1152 [inline]
 __kfree_skb net/core/skbuff.c:1166 [inline]
 consume_skb+0x9e/0xf0 net/core/skbuff.c:1398

 I
 netlink_broadcast_filtered+0x103c/0x1140 net/netlink/af_netlink.c:1524
     kworker/1:2  5164     40442.253396   E       40443.653396           1.400000       101.275338       270     120 
        0.000000         0.000000         0.000000
 nlmsg_multicast_filtered include/net/netlink.h:1151 [inline]
 nlmsg_multicast include/net/netlink.h:1170 [inline]
 nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2577
   0      0
 inet6_ifa_notify net/ipv6/addrconf.c:5625 [inline]
 __ipv6_ifa_notify+0x236/0xac0 net/ipv6/addrconf.c:6273
        /

 R
         syslogd  5183     59731.572129   E       59732.972129           1.400000       303.853793      2465     120 
        0.000000         0.000000         0.000000
   0      0
        /

 R
           acpid  5186     59244.448272   E       59245.848272           1.400000        46.315460        82     120 
 ipv6_ifa_notify net/ipv6/addrconf.c:6325 [inline]
 addrconf_dad_completed+0x180/0xd60 net/ipv6/addrconf.c:4324
        0.000000         0.000000         0.000000
   0      0
        /
 addrconf_dad_work+0xc36/0x14b0 net/ipv6/addrconf.c:-1

 S
           klogd  5190     58919.342233   E       58920.742233           1.400000       354.462714      2237     120 
        0.000000         0.000000         0.000000
   0      0
        /

 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 R
           udevd  5201     59746.540159   E       59747.940159           1.400000     60399.156955      2532     120 
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
        0.000000         0.000000         0.000000
 kthread+0x70e/0x8a0 kernel/kthread.c:464
   0      0
        /

 S
     dbus-daemon  5480     19656.351432   E       19656.410548           1.400000         4.015118         1     120 
        0.000000         0.000000         0.000000
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
   0      0
        /

 S
          dhcpcd  5495     58919.342233   E       58920.742233           1.400000       273.406272       942     120 
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
        0.000000         0.000000         0.000000
 </TASK>
   0      0
rcu: rcu_preempt kthread starved for 5224 jiffies! g12797 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
        /
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.

 S
rcu: RCU grace-period kthread stack dump:
          dhcpcd  5498     58919.342233   E       58920.742233           1.400000        13.225971        47     120 
task:rcu_preempt     state:R
        0.000000         0.000000         0.000000
  running task    
   0      0
 stack:27320 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
        /
Call Trace:

 <TASK>
 S
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
            sshd  5591     29268.858644   E       29269.951490           1.400000        84.020313        31     120 
        0.000000         0.000000         0.000000
   0      0
        /

 S
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
          dhcpcd  5635     22797.255273   E       22798.510338           1.400000         8.506654         7     120 
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
        0.000000         0.000000         0.000000
   0      0
        /

 S
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
          dhcpcd  5642     22796.867741   E       22798.119235           1.400000         8.118258         4     120 
        0.000000         0.000000         0.000000
   0      0
        /

 S
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
    sshd-session  5866     58919.342233   E       58920.666984           1.400000        14.773170         9     120 
        0.000000         0.000000         0.000000
   0      0
        /
 kthread+0x70e/0x8a0 kernel/kthread.c:464

 R
    syz-execprog  5868     59556.517497   E       59557.917497           1.400000        52.078392      1512     120 
        0.000000         0.000000         0.000000
   0      0
        /
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148

 R
    syz-execprog  5869     59299.190987   E       59300.590987           1.400000       712.034952       663     120 
        0.000000         0.000000         0.000000
   0      0
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
        /
 </TASK>

 S
rcu: Stack dump where RCU GP kthread last ran:
    syz-execprog  5870     30033.047890   E       30033.928758           1.400000        20.222324        85     120 
CPU: 1 UID: 0 PID: 5956 Comm: kworker/u8:2 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) 
        0.000000         0.000000         0.000000
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
   0      0
Workqueue: events_unbound toggle_allocation_gate
        /


RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
 S
Code: 24 65 48 8b 0c 25 08 00 9d 92 65 8b 15 78 b1 dc 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48
    syz-execprog  5871     30033.201097   E       30034.550941           1.400000       495.689909       198     120 
RSP: 0018:ffffc9000408f698 EFLAGS: 00000246
        0.000000         0.000000         0.000000

   0      0
RAX: ffffffff81b4d950 RBX: ffff8880b873b1c0 RCX: ffff8880348ebc00
        /
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000

RBP: ffffc9000408f800 R08: ffffffff8fa104f7 R09: 1ffffffff1f4209e
R10: dffffc0000000000 R11: fffffbfff1f4209f R12: 1ffff110170c8385
 S
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8641c28
    syz-execprog  5873     58918.656508   E       58919.946203           1.400000       191.400039       172     120 
FS:  0000000000000000(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000
        0.000000         0.000000         0.000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   0      0
CR2: 00007fab200a27b8 CR3: 000000000df38000 CR4: 00000000003526f0
        /
Call Trace:

 R
 <TASK>
    syz-executor  5876     59731.686374   E       59733.086374           1.400000      4748.965365       218     120 
 csd_lock_wait kernel/smp.c:340 [inline]
 smp_call_function_many_cond+0xf80/0x12d0 kernel/smp.c:885
        0.000000         0.000000         0.000000
   0      0
        /

 R
           udevd  5883     59368.403506   E       59369.803506           1.400000       193.554500       130     120 
        0.000000         0.000000         0.000000
   0      0
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
        /
 on_each_cpu include/linux/smp.h:71 [inline]
 smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline]
 smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2901

 I
    kworker/u8:0  5908     58919.342233   E       58920.702574           1.400000       381.414433       686     120 
        0.000000         0.000000         0.000000
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
   0      0
 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210
        /
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223

 R
 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850
    kworker/u8:1  5917     59726.054260   E       59727.454260           1.400000       116.146838       155     120 
        0.000000         0.000000         0.000000
   0      0
        /

 R
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
           udevd  5922     59368.400047   E       59369.800047           1.400000       443.583140       351     120 
        0.000000         0.000000         0.000000
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
   0      0
        /

 kthread+0x70e/0x8a0 kernel/kthread.c:464
 I
     kworker/1:3  5949     58904.548972   E       58905.948972           1.400000         5.487483        42     120 
        0.000000         0.000000         0.000000
   0      0
        /

 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
>R
    kworker/u8:2  5956    110545.760151   N      110547.160151           1.400000     52007.187530       724     120 
        0.000000         0.000000         0.000000
   0      0
        /
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

 </TASK>
 R           udevd  5986     59728.265771   E       59729.665771           1.400000        11.046962         6     120         0.000000         0.000000         0.000000   0      0        /
 R     kworker/1:4  5987     59722.734401   E       59724.134401           1.400000         0.609142       232     120         0.000000         0.000000         0.000000   0      0        /
 R           udevd  5994     59730.798692   E       59732.198692           1.400000        17.352938        13     120         0.000000         0.000000         0.000000   0      0        /
 R    syz-executor  5995         0.638759   E           0.761241           1.400000       246.382386       374     120         0.000000         0.000000         0.000000   0      0        /syz2
 S   krxrpcio/7001  5996     58917.882305   E       58917.898456           1.400000         0.000000         2     100         0.000000         0.000000         0.000000   0      0        /
 S      napi/wg0-0  6028     58917.882305   E       58919.282305           1.400000         0.047109         3     120         0.000000         0.000000         0.000000   0      0        /
 S      napi/wg1-0  6030     58919.260772   E       58920.660772           1.400000         0.032427         4     120         0.000000         0.000000         0.000000   0      0        /
 S      napi/wg2-0  6032     58919.260772   E       58920.660772           1.400000         0.046774         4     120         0.000000         0.000000         0.000000   0      0        /
 Z        syz.2.17  6058         0.636093   N           0.351424           1.400000         6.923318        14     120         0.000000         0.000000         0.000000   0      0        /syz2
 R        syz.2.17  6059         0.638759   E           0.761241           1.400000         3.437675        25     120         0.000000         0.000000         0.000000   0      0        /syz2
 R dhcpcd-run-hook  6087     63156.069123   N       63157.469123           1.400000      4249.058233        18     120         0.000000         0.000000         0.000000   0      0        /


Showing all locks held in the system:
2 locks held by getty/5592:
 #0: ffff88803087c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fee2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by kworker/u8:1/5917:
5 locks held by kworker/u8:2/5956:
4 locks held by kworker/0:4/5983:
3 locks held by kworker/1:4/5987:
6 locks held by udevd/5993:
 #0: ffff88807cc357e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:356 [inline]
 #0: ffff88807cc357e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb50 mm/mmap.c:1292
 #1: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #1: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #1: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 #1: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xa5/0x2390 arch/x86/kernel/unwind_orc.c:479
 #2: ffff8880681a4230 (&dev->event_lock#2){..-.}-{3:3}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
 #2: ffff8880681a4230 (&dev->event_lock#2){..-.}-{3:3}, at: input_event+0x7a/0xc0 drivers/input/input.c:394
 #3: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 #3: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: input_pass_values+0x8d/0x890 drivers/input/input.c:118
 #4: ffffffff8e9a5f58 (kbd_event_lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffffffff8e9a5f58 (kbd_event_lock){..-.}-{3:3}, at: kbd_event+0xd2/0x3ec0 drivers/tty/vt/keyboard.c:1528
 #5: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #5: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #5: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by dhcpcd-run-hook/6087:

=============================================

task:init            state:S stack:18808 pid:1     tgid:1     ppid:0      task_flags:0x400100 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 schedule_hrtimeout_range_clock+0x1c5/0x2f0 kernel/time/sleep_timeout.c:207
 do_sigtimedwait+0x386/0x680 kernel/signal.c:3782
 __do_sys_rt_sigtimedwait kernel/signal.c:3826 [inline]
 __se_sys_rt_sigtimedwait+0x1cd/0x2b0 kernel/signal.c:3804
 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: 0033:0x7ff734ef9407
RSP: 002b:00007fffe0323230 EFLAGS: 00000202 ORIG_RAX: 0000000000000080
RAX: ffffffffffffffda RBX: 00007ff734da9c80 RCX: 00007ff734ef9407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ff735113498
RBP: 00007ff735113490 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000202 R12: 00007ff735113490
R13: 00007fffe03232ac R14: 00007ff735153000 R15: 000055ccc6a55d98
 </TASK>
task:kthreadd        state:S stack:26304 pid:2     tgid:2     ppid:0      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 kthreadd+0x3e3/0x770 kernel/kthread.c:835
 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>
task:pool_workqueue_ state:S stack:26648 pid:3     tgid:3     ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 kthread_worker_fn+0x4c2/0xb60 kernel/kthread.c:1017
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148