watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.3.125:6406] Modules linked in: irq event stamp: 5787195 hardirqs last enabled at (5787194): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (5787195): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (2413402): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (2413402): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (2413402): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 softirqs last disabled at (2413405): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (2413405): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (2413405): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6406 Comm: syz.3.125 Not tainted 6.14.0-syzkaller-g8582d9ab3efd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd9/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 2b 00 74 08 4c 89 f7 e8 2d 51 fb f5 f6 44 24 21 02 75 55 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 a2 71 5e f5 65 8b 05 fb 7d 36 07 85 c0 74 46 48 c7 04 24 0e 36 RSP: 0018:ffffc90000007780 EFLAGS: 00000206 RAX: 9805dfec3c696f00 RBX: 1ffff92000000ef4 RCX: 0000000000000002 RDX: 0000000000000002 RSI: ffffffff8e64727b RDI: 0000000000000001 RBP: ffffc90000007810 R08: ffffffff905fce77 R09: 1ffffffff20bf9ce R10: dffffc0000000000 R11: fffffbfff20bf9cf R12: 1ffff92000000ef0 R13: dffffc0000000000 R14: ffffc900000077a0 R15: 0000000000000246 FS: 00007f541255a6c0(0000) GS:ffff888124f9f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000001 CR3: 000000007aaf0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_assert_init+0x30e/0x4d0 lib/debugobjects.c:1009 debug_timer_assert_init kernel/time/timer.c:845 [inline] debug_assert_init kernel/time/timer.c:890 [inline] __mod_timer+0xd2/0x10f0 kernel/time/timer.c:1067 addrconf_mod_rs_timer+0x51/0xe0 net/ipv6/addrconf.c:328 addrconf_rs_timer+0x473/0x680 net/ipv6/addrconf.c:4043 call_timer_fn+0x189/0x650 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x66e/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 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+0xf9/0x1c0 kernel/sched/core.c:7090 Code: 89 fe 49 c1 ee 03 eb 0d 48 f7 03 08 00 00 00 0f 84 89 00 00 00 bf 01 00 00 00 e8 52 fe 5f f5 e8 cd aa 9a f5 fb bf 01 00 00 00 32 a5 ff ff 43 80 3c 26 00 74 08 4c 89 ff e8 33 e0 fc f5 48 c7 RSP: 0018:ffffc9001ae2f880 EFLAGS: 00000286 RAX: 9805dfec3c696f00 RBX: 1ffff920035c5f18 RCX: ffffffff81caadac RDX: 0000000000000000 RSI: ffffffff8e64727b RDI: 0000000000000001 RBP: ffffc9001ae2f930 R08: ffffffff905fce77 R09: 1ffffffff20bf9ce R10: dffffc0000000000 R11: fffffbfff20bf9cf R12: dffffc0000000000 R13: 1ffff920035c5f10 R14: 1ffff920035c5f14 R15: ffffc9001ae2f8a0 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:futex_hash kernel/futex/core.c:122 [inline] RIP: 0010:futex_q_lock+0x149/0x230 kernel/futex/core.c:510 Code: c0 10 44 31 f3 29 c3 31 dd 89 d8 c1 c0 04 29 c5 41 31 ee c1 c5 0e 41 29 ee 44 31 f3 41 c1 c6 18 44 29 f3 48 8b 2d 07 56 aa 0e <23> 1d 11 56 aa 0e 48 c1 e3 07 4c 8d 34 2b 4c 89 f7 be 04 00 00 00 RSP: 0018:ffffc9001ae2f9f0 EFLAGS: 00000296 RAX: 00000000be5f82df RBX: 000000009f14e9af RCX: 00000000f889d977 RDX: 00000000c27e2778 RSI: 00000000000028d3 RDI: ffffc9001ae2fb34 RBP: ffffc90000a5c000 R08: ffffffff81b659d6 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000ffffffff R12: dffffc0000000000 R13: 0000000000000000 R14: 000000002044bc5e R15: ffffc9001ae2fae0 futex_wait_setup+0x87/0x2a0 kernel/futex/waitwake.c:621 __futex_wait+0x13e/0x320 kernel/futex/waitwake.c:663 futex_wait+0x103/0x370 kernel/futex/waitwake.c:696 do_futex+0x37c/0x5a0 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x436/0x4c0 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f541178e169 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:00007f541255a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f54119b6088 RCX: 00007f541178e169 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f54119b6088 RBP: 00007f54119b6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f54119b608c R13: 0000000000000000 R14: 00007fff1a5864b0 R15: 00007fff1a586598 Sending NMI from CPU 0 to CPUs 1: rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6470 Comm: kworker/u8:16 Not tainted 6.14.0-syzkaller-g8582d9ab3efd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:check_preemption_disabled+0x8/0x120 lib/smp_processor_id.c:13 Code: 40 af a1 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 41 54 <53> 48 83 ec 10 4c 8d 25 bc 20 39 07 65 49 8b 04 24 48 89 44 24 08 RSP: 0018:ffffc90000a084e0 EFLAGS: 00000087 RAX: ffffffff942ba6d0 RBX: ffffffff93681020 RCX: ffffe8ffffd228a0 RDX: ffffffff81a1d639 RSI: ffffffff8e50333c RDI: ffffffff8ca1af60 RBP: ffffffff81a1d639 R08: 0000000000000003 R09: fffff520001410a0 R10: dffffc0000000000 R11: fffff520001410a0 R12: ffffffff93681020 R13: ffff888025a51e00 R14: 0000000000000087 R15: ffffffff8ec19a18 FS: 0000000000000000(0000) GS:ffff88812509f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff1fe874af2 CR3: 000000000eb38000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:467 [inline] lock_release+0xc2/0x3e0 kernel/locking/lockdep.c:5886 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186 console_lock_spinning_enable kernel/printk/printk.c:1920 [inline] console_emit_next_record kernel/printk/printk.c:3132 [inline] console_flush_all+0x7d9/0xec0 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0x151/0x3b0 kernel/printk/printk.c:3325 vprintk_emit+0x761/0xa40 kernel/printk/printk.c:2450 _printk+0xd5/0x120 kernel/printk/printk.c:2475 print_other_cpu_stall+0x1ae/0x15e0 kernel/rcu/tree_stall.h:598 check_cpu_stall kernel/rcu/tree_stall.h:795 [inline] rcu_pending kernel/rcu/tree.c:3630 [inline] rcu_sched_clock_irq+0xa2a/0x10f0 kernel/rcu/tree.c:2669 update_process_times+0x242/0x2f0 kernel/time/timer.c:2515 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1791 [inline] __hrtimer_run_queues+0x55c/0xd40 kernel/time/hrtimer.c:1855 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d 24 e7 b6 0c 48 89 de 5b e9 d3 b3 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 10 68 93 65 8b 15 e8 52 RSP: 0018:ffffc9003413f638 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 1ffff110170c823d RCX: ffff888025a51e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9003413f840 R08: ffffffff81b6e558 R09: 1ffffffff20bf9ce R10: dffffc0000000000 R11: fffffbfff20bf9cf R12: ffff8880b873ad08 R13: ffff8880b86411e8 R14: ffff8880b873ad00 R15: 0000000000000000 csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0x1bcd/0x2d40 kernel/smp.c:885 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2455 [inline] text_poke_bp_batch+0x354/0xb30 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xc0/0x250 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245