watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.1.64:6172] Modules linked in: irq event stamp: 9969001 hardirqs last enabled at (9969000): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (9969001): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (9968994): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9968994): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9968994): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9968997): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9968997): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9968997): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6172 Comm: syz.1.64 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:318 [inline] RIP: 0010:handle_softirqs+0x1b0/0x870 kernel/softirq.c:567 Code: 89 64 24 30 0f b7 db 48 c7 c7 c0 a4 89 8b e8 87 7d e1 09 65 66 c7 05 95 6a 17 11 00 00 e8 18 45 42 00 fb 49 c7 c7 c0 c0 e0 8d ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c RSP: 0018:ffffc90000007e40 EFLAGS: 00000286 RAX: 68aa27c1b9e69d00 RBX: 0000000000000200 RCX: 68aa27c1b9e69d00 RDX: 0000000000000000 RSI: ffffffff8d982053 RDI: ffffffff8be28cc0 RBP: ffffc90000007f50 R08: ffffffff8fa104f7 R09: 1ffffffff1f4209e R10: dffffc0000000000 R11: fffffbfff1f4209f R12: 000000000000000a R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0 FS: 00007ff4d5bf66c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f60aabf98 CR3: 0000000033896000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7108 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 9f 28 f6 e8 56 b7 5f f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000c3b78e0 EFLAGS: 00000282 RAX: 68aa27c1b9e69d00 RBX: 0000000000000000 RCX: 68aa27c1b9e69d00 RDX: 0000000000000000 RSI: ffffffff8d982053 RDI: 0000000000000001 RBP: ffffc9000c3b7990 R08: ffffffff8fa104f7 R09: 1ffffffff1f4209e R10: dffffc0000000000 R11: fffffbfff1f4209f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001876f1c irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:should_fail_ex+0x14d/0x560 lib/fault-inject.c:131 Code: eb 4b 65 4c 8b 3c 25 08 00 9d 92 49 81 c7 e4 15 00 00 4d 89 fd 49 c1 ed 03 43 0f b6 44 25 00 84 c0 0f 85 f4 02 00 00 41 8b 2f <85> ed 0f 84 e2 fe ff ff ff cd 43 0f b6 44 25 00 84 c0 0f 85 15 03 RSP: 0018:ffffc9000c3b7a50 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8e16f140 RCX: ffff88802bb03c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8e16f140 RBP: 0000000000000000 R08: ffffc9000c3b7c57 R09: 0000000000000000 R10: ffffc9000c3b7c40 R11: fffff52001876f8b R12: dffffc0000000000 R13: 1ffff11005760a3c R14: 0000000000000001 R15: ffff88802bb051e4 should_fail_futex kernel/futex/core.c:102 [inline] get_futex_key+0x1a8/0x1640 kernel/futex/core.c:575 futex_wake+0xf8/0x560 kernel/futex/waitwake.c:165 do_futex+0x395/0x420 kernel/futex/syscalls.c:107 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff4d7d8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff4d5bf60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007ff4d7fb5fa8 RCX: 00007ff4d7d8e929 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff4d7fb5fac RBP: 00007ff4d7fb5fa0 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4d7fb5fac R13: 0000000000000000 R14: 00007ffd438198f0 R15: 00007ffd438199d8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6182 Comm: kworker/u8:9 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:235 Code: 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 cc cc cc cc cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 RSP: 0018:ffffc9000c377698 EFLAGS: 00000293 RAX: ffffffff81b4d950 RBX: ffff8880b873b1c0 RCX: ffff888024a30000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000c377800 R08: ffffffff8fa104f7 R09: 1ffffffff1f4209e R10: dffffc0000000000 R11: fffffbfff1f4209f R12: 1ffff110170c8385 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8641c28 FS: 0000000000000000(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5c24c36c59 CR3: 000000000df38000 CR4: 00000000003526f0 Call Trace: csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0xf80/0x12d0 kernel/smp.c:885 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline] smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2901 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245