ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ip6_tunnel: ip6gretap0 xmit: Local address not yet configured! watchdog: BUG: soft lockup - CPU#1 stuck for 266s! [kworker/u8:1:13] Modules linked in: irq event stamp: 6526842 hardirqs last enabled at (6526841): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:515 [inline] hardirqs last enabled at (6526841): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:550 [inline] hardirqs last enabled at (6526841): [] irqentry_exit+0x246/0x790 kernel/entry/common.c:164 hardirqs last disabled at (6526842): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (6526834): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (6526834): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (6526834): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (6526813): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (6526813): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (6526813): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x58e/0x1700 kernel/smp.c:892 Code: 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 69 83 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 63 0f 00 00 8b 45 08 31 ff 83 e0 01 41 RSP: 0018:ffffc90000127870 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fbfebd RDX: ffff88801e295c40 RSI: ffffffff81fbfe97 RDI: ffff88801e295c40 RBP: ffff8880b8443180 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017088631 R14: 0000000000000001 R15: ffff8880b853c700 FS: 0000000000000000(0000) GS:ffff888124476000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb2fde4f0d1 CR3: 000000000e596000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 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:906 [inline] toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:898 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 20532 Comm: syz.0.4140 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:trace_hrtimer_expire_entry include/trace/events/timer.h:261 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1927 [inline] RIP: 0010:__hrtimer_run_queues+0x3e3/0xa00 kernel/time/hrtimer.c:1994 Code: 48 c1 e8 06 48 8d 3c c5 50 cb d7 90 e8 76 f8 80 00 4c 0f a3 2d ce 77 e3 0e 41 0f 92 c5 31 ff 44 89 ee e8 c0 28 14 00 45 84 ed <0f> 85 8e 03 00 00 e8 62 2e 14 00 49 8d 7c 24 3b 48 89 f8 48 89 fa RSP: 0018:ffffc90000007e88 EFLAGS: 00000002 RAX: 0000000000010000 RBX: ffffffff899a56a0 RCX: ffffffff81f45390 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888085653d80 RBP: ffff8880b8428600 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88803246a300 R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b8428650 FS: 00007f7394eac6c0(0000) GS:ffff888124376000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffe70 CR3: 0000000093225000 CR4: 0000000000350ef0 Call Trace: 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:copy_mc_enhanced_fast_string+0x6/0xf arch/x86/lib/copy_mc_64.S:130 Code: 89 ca e9 1d fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 f8 48 89 d1 a4 31 c0 e9 9c f2 88 f5 48 89 c8 e9 94 f2 88 f5 66 0f 1f 84 00 RSP: 0018:ffffc900050870a8 EFLAGS: 00000246 RAX: ffff88805fb49000 RBX: 0000000000001000 RCX: 0000000000000620 RDX: 0000000000001000 RSI: ffff88804a8b09e0 RDI: ffff88805fb499e0 RBP: ffff88805fb49000 R08: 0000000000000000 R09: ffffed10095161ff R10: ffff88804a8b0fff R11: 0000000000000000 R12: ffff88804a8b0000 R13: 000000110cf68000 R14: ffffc90005087848 R15: dffffc0000000000 copy_mc_to_kernel+0x47/0xc0 arch/x86/lib/copy_mc.c:75 dump_page_copy fs/coredump.c:1327 [inline] dump_user_range+0x21f/0xad0 fs/coredump.c:1378 elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109 coredump_write fs/coredump.c:1053 [inline] do_coredump fs/coredump.c:1132 [inline] vfs_coredump+0x29a0/0x5770 fs/coredump.c:1206 get_signal+0x1f2a/0x21e0 kernel/signal.c:3022 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:252 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:323 [inline] irqentry_exit+0x403/0x790 kernel/entry/common.c:162 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f7393f9cde1 Code: 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:fffffffffffffe70 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f7394215fa0 RCX: 00007f7393f9cdd9 RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000 RBP: 00007f7394032d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f7394216038 R14: 00007f7394215fa0 R15: 00007ffd32472f38