watchdog: BUG: soft lockup - CPU#1 stuck for 121s! [dhcpcd-run-hook:26384] Modules linked in: irq event stamp: 919 hardirqs last enabled at (918): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (918): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (918): [] irqentry_exit+0x218/0x8b0 kernel/entry/common.c:164 hardirqs last disabled at (919): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (0): [] rcu_lock_acquire include/linux/rcupdate.h:300 [inline] softirqs last enabled at (0): [] rcu_read_lock include/linux/rcupdate.h:838 [inline] softirqs last enabled at (0): [] copy_process+0xd87/0x4440 kernel/fork.c:2130 softirqs last disabled at (869): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (869): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (869): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 26384 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:312 [inline] RIP: 0010:handle_softirqs+0x160/0x840 kernel/softirq.c:610 Code: 89 6c 24 20 0f b7 db 48 c7 c7 c0 1c cb 8b e8 67 83 1f 0a 65 66 c7 05 35 50 b0 11 00 00 e8 28 14 46 00 fb 48 c7 c5 c0 a0 60 8e ff ff ff ff 0f bc c3 41 89 c6 41 ff c6 0f 84 09 04 00 00 89 5c RSP: 0018:ffffc90000a08f28 EFLAGS: 00000206 RAX: 0000000000000366 RBX: 0000000000000386 RCX: 0000000000000100 RDX: 0000000000000002 RSI: ffffffff8dfa3620 RDI: ffffffff8c28b6e0 RBP: ffffffff8e60a0c0 R08: ffffffff903024f7 R09: 1ffffffff206049e R10: dffffc0000000000 R11: fffffbfff206049f R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880340bbe00 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88812539e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe45921078 CR3: 000000000e74a000 CR4: 00000000003526f0 Call Trace: __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:kernel_text_address+0x0/0xe0 kernel/extable.c:95 Code: c1 48 81 fb 00 02 b3 91 0f 92 c2 20 ca 08 c2 0f b6 c2 5b e9 12 6e 1a 0a cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 55 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 88 RSP: 0018:ffffc90003fff6d0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff81000130 RCX: 0000000000000046 RDX: 0000000000000001 RSI: ffffffff8e215f4f RDI: ffffffff81000130 RBP: ffffc90003fff790 R08: ffffc90003ffff38 R09: 0000000000000000 R10: ffffc90003fff758 R11: fffff520007ffeed R12: ffff8880340bbe00 R13: 1ffff1100681787e R14: dffffc0000000000 R15: 1ffff920007ffeea __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 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:1397 [inline] __free_frozen_pages+0xc1c/0xd30 mm/page_alloc.c:2938 tlb_batch_list_free mm/mmu_gather.c:161 [inline] tlb_finish_mmu+0x144/0x230 mm/mmu_gather.c:552 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x1f6/0x2d0 kernel/exit.c:582 do_exit+0x6a2/0x22c0 kernel/exit.c:964 do_group_exit+0x21b/0x2d0 kernel/exit.c:1119 __do_sys_exit_group kernel/exit.c:1130 [inline] __se_sys_exit_group kernel/exit.c:1128 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1128 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f128392d6c5 Code: Unable to access opcode bytes at 0x7f128392d69b. RSP: 002b:00007ffe45920f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007ffe45921204 RCX: 00007f128392d6c5 RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000 RBP: 0000000000000003 R08: 00007ffe45921080 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe459212c0 R14: 00007f1283b3d000 R15: 000055aa5f6b7d98 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7961 Comm: kworker/0:10 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events drain_vmap_area_work RIP: 0010:debug_spin_lock_after kernel/locking/spinlock_debug.c:94 [inline] RIP: 0010:do_raw_spin_lock+0x158/0x2f0 kernel/locking/spinlock_debug.c:118 Code: 40 b9 01 00 00 00 f0 0f b1 0b 0f 85 20 01 00 00 43 c6 44 34 04 f8 65 8b 1d 99 d9 95 11 43 0f b6 04 37 84 c0 0f 85 6a 01 00 00 <41> 89 5d 00 48 8b 44 24 10 42 80 3c 30 00 48 8b 5c 24 18 74 12 48 RSP: 0018:ffffc90000007d20 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007d60 RBP: ffffc90000007dc8 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000fac R12: 1ffff92000000fa8 R13: ffff8880b8628288 R14: dffffc0000000000 R15: 1ffff110170c5051 FS: 0000000000000000(0000) GS:ffff88812529e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055aa6fa88018 CR3: 000000000e74a000 CR4: 00000000003526f0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1934 [inline] __hrtimer_run_queues+0x46a/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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xfcf/0x13d0 kernel/smp.c:892 Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 9a 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 45 03 0c 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 2a 03 0c RSP: 0018:ffffc90003937760 EFLAGS: 00000293 RAX: ffffffff81b9b376 RBX: ffff8880b863c188 RCX: ffff88802bbbdd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900039378a0 R08: ffffffff903024f7 R09: 1ffffffff206049e R10: dffffc0000000000 R11: fffffbfff206049f R12: 1ffff110170e8171 R13: dffffc0000000000 R14: ffff8880b8740b88 R15: 0000000000000001 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057 flush_tlb_kernel_range+0x44f/0x460 arch/x86/mm/tlb.c:-1 kasan_release_vmalloc include/linux/kasan.h:593 [inline] kasan_release_vmalloc_node mm/vmalloc.c:2294 [inline] purge_vmap_node+0x39c/0x960 mm/vmalloc.c:2306 __purge_vmap_area_lazy+0x779/0xb40 mm/vmalloc.c:2396 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2430 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478 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