rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10505 jiffies, g=90801, q=1582 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4295073064-4295062564), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g90801 f0x2 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:27544 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x389/0x470 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 23347 Comm: dhcpcd-run-hook 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:lockdep_enabled kernel/locking/lockdep.c:121 [inline]
RIP: 0010:lock_acquire+0x9a/0x350 kernel/locking/lockdep.c:5844
Code: d3 00 00 00 48 8b b4 24 90 00 00 00 4c 89 ef e8 8c 22 8f 00 83 3d 05 4a 8f 0e 00 0f 84 ce 00 00 00 65 8b 05 e8 ff 97 11 85 c0 <0f> 85 bf 00 00 00 65 48 8b 05 30 ba 97 11 83 b8 8c 0b 00 00 00 0f
RSP: 0018:ffffc90000a08cc8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000010003
RDX: 0000000000000000 RSI: ffffffff8babce80 RDI: 1ffffffff34cc38e
RBP: ffffffff84bcdc9c R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1006483863 R12: 0000000000000000
R13: ffffffff9a661c70 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125389000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b616de286 CR3: 00000000b0f27000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __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+0x6c/0x3a0 lib/debugobjects.c:890
 debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1898 [inline]
 __hrtimer_run_queues+0x23a/0xa20 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:memset+0xf/0x20 arch/x86/lib/memset_64.S:38
Code: 44 88 1f e9 2e f6 66 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 e9 02 f6 66 f5 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f6fefb0 EFLAGS: 00000202
RAX: 1ffff92001edfe00 RBX: ffffc9000f6ff0d8 RCX: 000000000000000f
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc9000f6ff0d9
RBP: dffffc0000000000 R08: ffffc9000f6ff0e7 R09: ffffc9000f6ff0d8
R10: dffffc0000000000 R11: fffff52001edfe1d R12: ffffc9000f6ff410
R13: 1ffff92001edfe13 R14: ffffc9000f6ff088 R15: ffffc9000f6ff0d0
 unwind_next_frame+0xf33/0x2550 arch/x86/kernel/unwind_orc.c:621
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 slab_free_hook mm/slub.c:2650 [inline]
 slab_free mm/slub.c:6250 [inline]
 kmem_cache_free+0x44f/0x650 mm/slub.c:6377
 anon_vma_free mm/rmap.c:137 [inline]
 __put_anon_vma+0x12b/0x2d0 mm/rmap.c:2915
 put_anon_vma mm/internal.h:216 [inline]
 unlink_anon_vmas+0x58b/0x730 mm/rmap.c:536
 free_pgtables+0x836/0xb70 mm/memory.c:414
 exit_mmap+0x490/0x9e0 mm/mmap.c:1312
 __mmput+0x118/0x430 kernel/fork.c:1178
 exec_mmap+0x3b4/0x440 fs/exec.c:893
 begin_new_exec+0x134a/0x2480 fs/exec.c:1148
 load_elf_binary+0xa47/0x2980 fs/binfmt_elf.c:1010
 search_binary_handler fs/exec.c:1664 [inline]
 exec_binprm fs/exec.c:1696 [inline]
 bprm_execve+0x94a/0x1510 fs/exec.c:1748
 do_execveat_common+0x50d/0x690 fs/exec.c:1846
 __do_sys_execve fs/exec.c:1930 [inline]
 __se_sys_execve fs/exec.c:1924 [inline]
 __x64_sys_execve+0x97/0xc0 fs/exec.c:1924
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8b61624107
Code: Unable to access opcode bytes at 0x7f8b616240dd.
RSP: 002b:00007ffecd448788 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000056477ae64190 RCX: 00007f8b61624107
RDX: 000056477ae641b8 RSI: 000056477ae64190 RDI: 000056477ae64270
RBP: 000056477ae64270 R08: 00007ffecd44ddf1 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000056477ae641b8
R13: 00007f8b617e9e8b R14: 000056477ae641b8 R15: 0000000000000000
 </TASK>