ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 watchdog: BUG: soft lockup - CPU#1 stuck for 245s! [kworker/u8:11:6647] Modules linked in: irq event stamp: 972306 hardirqs last enabled at (972305): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (972305): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (972305): [] irqentry_exit+0x24d/0xa00 kernel/entry/common.c:167 hardirqs last disabled at (972306): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (972302): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (972302): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (972302): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (972227): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (972227): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (972227): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 6647 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x58e/0x1870 kernel/smp.c:912 Code: b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 54 99 0c 00 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 a8 10 00 00 8b 45 08 31 RSP: 0018:ffffc900037a7858 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fdb6b2 RDX: ffff8880213cbe00 RSI: ffffffff81fdb68c RDI: ffff8880213cbe00 RBP: ffff8880b84434e0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed101708869d R14: 0000000000000001 R15: ffff8880b853c9c0 FS: 0000000000000000(0000) GS:ffff888123eda000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3132deb700 CR3: 000000000e994000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1077 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x37a/0x550 kernel/jump_label.c:910 static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:911 [inline] toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:903 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7278 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:check_preemption_disabled+0x24/0xe0 lib/smp_processor_id.c:54 Code: 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d d5 e5 a9 08 65 f7 05 c6 e5 a9 08 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d <41> 5c e9 90 c6 55 f5 9c 58 f6 c4 02 74 ea 65 4c 8b 25 8e e5 a9 08 RSP: 0018:ffffc90000007b48 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 703886c7d2646711 RDX: 0000000000000000 RSI: ffffffff8e185c88 RDI: ffffffff8c401a80 RBP: ffff8880760452c0 R08: 00000000ffffffff R09: 0000000000000d15 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888123dda000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f043e25ea10 CR3: 000000005edce000 CR4: 0000000000350ef0 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline] lock_acquire kernel/locking/lockdep.c:5870 [inline] lock_acquire+0x1c9/0x370 kernel/locking/lockdep.c:5825 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158 spin_lock include/linux/spinlock.h:342 [inline] advance_sched+0xe5/0xd20 net/sched/sch_taprio.c:930 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206 Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 da 8f 28 f6 48 89 df e8 62 df 28 f6 e8 bd 45 55 f6 fb bf 01 00 00 00 72 ee 17 f6 65 8b 05 bb 07 a7 08 85 c0 74 06 5b e9 8c e8 52 f5 RSP: 0018:ffffc90000007eb0 EFLAGS: 00000212 RAX: 0000000000004c10 RBX: ffff8880b8426280 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff8e1abb0b RDI: 0000000000000001 RBP: 1ffff92000000fd8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000006 R15: 0000000000000000 __run_timer_base kernel/time/timer.c:2387 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x11c/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:mas_find_setup lib/maple_tree.c:5292 [inline] RIP: 0010:mas_find+0x3f/0x740 lib/maple_tree.c:5385 Code: 48 e8 85 3f 57 f6 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 78 05 00 00 8b 7b 48 <48> c7 c6 a0 11 4f 8d 48 89 fd e8 22 3a 57 f6 83 fd 05 0f 84 96 02 RSP: 0018:ffffc900045a72b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc900045a7340 RCX: ffffffff8268f05e RDX: 1ffff920008b4e71 RSI: ffffffff8bb3105b RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000004 R09: 000000000000003c R10: 0000000000000009 R11: 0000000000000000 R12: ffffffffffffffff R13: ffffc900045a7388 R14: 00007f043e258000 R15: 00007f043e258000 vma_next include/linux/mm.h:1640 [inline] validate_mm+0x11d/0x4e0 mm/vma.c:653 vms_complete_munmap_vmas+0x83b/0xdd0 mm/vma.c:1364 __mmap_complete mm/vma.c:2617 [inline] __mmap_region+0xb42/0x2db0 mm/vma.c:2783 mmap_region+0x35d/0x620 mm/vma.c:2860 do_mmap+0xc63/0x12f0 mm/mmap.c:560 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f043e58b242 Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00 RSP: 002b:00007ffd6148e1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f043e256000 RCX: 00007f043e58b242 RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f043e256000 RBP: 0000000000000812 R08: 0000000000000003 R09: 000000000005f000 R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffd6148e288 R13: 00007f043e2626b0 R14: 00007ffd6148e600 R15: 00000fffac291c3c