RBP: 00007f1e0c16d024 R08: 000000000000006d R09: 001dba50a8d050ae R10: 00000039dc3194a5 R11: 0000000000000202 R12: 00007f1e0c16d9ed R13: 00007f1e0c35e128 R14: 00007f1e0c35e090 R15: 00007ffcd2e0f428 watchdog: BUG: soft lockup - CPU#0 stuck for 286s! [syz.2.916:3886] Modules linked in: CPU: 0 PID: 3886 Comm: syz.2.916 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline] RIP: 0010:handle_softirqs+0x10d/0x560 kernel/softirq.c:571 Code: 08 85 e8 36 75 6f 03 65 66 c7 05 2c 40 c4 7e 00 00 48 c7 c7 60 2c 08 85 e8 20 75 6f 03 65 44 89 35 30 42 c3 7e fb 44 89 75 a4 ff ff ff ff 0f bc 45 a4 41 89 c5 41 ff c5 0f 85 c0 00 00 00 48 RSP: 0018:ffffc90000007f38 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88811b6f0200 RCX: 86d9477a01be1000 RDX: 1ffffffff0e18a00 RSI: ffffffff85082c60 RDI: ffffffff85638500 RBP: ffffc90000007fc0 R08: ffffffff870c5008 R09: ffffffff870c5018 R10: ffffffff870c5003 R11: 1ffffffff0e18a00 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000200 R15: 000000000000000a FS: 00007f1e0ab0e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f162ca06dac CR3: 000000011a9de000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_softirq kernel/softirq.c:621 [inline] invoke_softirq kernel/softirq.c:443 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670 irq_exit_rcu+0x9/0x10 kernel/softirq.c:682 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x49/0x70 kernel/locking/spinlock.c:202 Code: 12 48 89 fb 48 c7 c7 38 47 6d 86 e8 51 e7 f4 fc 48 89 df 48 83 3d 5e 00 b9 01 00 74 27 e8 a3 b0 9b fc 66 90 fb bf 01 00 00 00 a2 7e 93 fc 65 8b 05 93 26 4e 7b 85 c0 74 03 5b 5d c3 e8 33 32 RSP: 0018:ffffc900009a7c30 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88811b6f8848 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffffc900009a7c38 R08: ffff88811b6f8007 R09: 1ffff110236df000 R10: dffffc0000000000 R11: ffffed10236df001 R12: dffffc0000000000 R13: ffffc900009a7e80 R14: 0000000000000000 R15: ffff88811b6f8840 spin_unlock_irq include/linux/spinlock.h:414 [inline] __set_current_blocked+0x208/0x230 kernel/signal.c:3096 set_current_blocked+0x3a/0x40 kernel/signal.c:3080 __ia32_sys_rt_sigreturn+0x16b/0x730 arch/x86/kernel/signal.c:672 x64_sys_call+0x4ab/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:16 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1e0c0774d9 Code: 11 06 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 0c 25 RSP: 002b:00007f1e0ab0da80 EFLAGS: 00000202 ORIG_RAX: 000000000000000f RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1e0c0774d9 RDX: 00007f1e0ab0da80 RSI: 00007f1e0ab0dbb0 RDI: 0000000000000021 RBP: 00007f1e0c16d024 R08: 000000000000006d R09: 001dba50a8d050ae R10: 00000039dc3194a5 R11: 0000000000000202 R12: 00007f1e0c16d9ed R13: 00007f1e0c35e128 R14: 00007f1e0c35e090 R15: 00007ffcd2e0f428 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10 Comm: kworker/u4:1 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0x8ad/0x9e0 kernel/smp.c:969 Code: 0f b6 44 05 00 84 c0 0f 85 9b 00 00 00 41 8b 1f 89 de 83 e6 01 31 ff e8 31 48 0a 00 83 e3 01 75 07 e8 77 44 0a 00 eb 42 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 75 10 41 f7 RSP: 0018:ffffc900000a7860 EFLAGS: 00000293 RAX: ffffffff815f772f RBX: 0000000000000001 RCX: ffff888100274f00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900000a7978 R08: ffff8881f7138e97 R09: 1ffff1103ee271d2 R10: dffffc0000000000 R11: ffffed103ee271d3 R12: ffff8881f7138e80 R13: 1ffff1103ee07af9 R14: 0000000000000000 R15: ffff8881f703d7c8 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ad4d90000 CR3: 000000000660f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1134 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1442 [inline] text_poke_bp_batch+0x1d4/0x600 arch/x86/kernel/alternative.c:1642 text_poke_flush arch/x86/kernel/alternative.c:1833 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1840 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0x38f/0x3b0 kernel/jump_label.c:459 jump_label_update+0x39b/0x450 kernel/jump_label.c:830 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207 static_key_disable+0x1a/0x30 kernel/jump_label.c:215 toggle_allocation_gate+0x3af/0x440 mm/kfence/core.c:797 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287