watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.16:5983] Modules linked in: irq event stamp: 16762523 hardirqs last enabled at (16762522): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (16762523): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (16268524): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (16268524): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (16268524): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 softirqs last disabled at (16268527): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (16268527): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (16268527): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5983 Comm: syz.4.16 Not tainted 6.14.0-syzkaller-g9bae8f4f2168 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4a bc 6b f5 48 89 df e8 82 65 6c f5 e8 6d 06 98 f5 fb bf 01 00 00 00 f2 47 5d f5 65 8b 05 1b 5d 35 07 85 c0 74 06 5b c3 cc cc cc cc RSP: 0000:ffffc90000007c70 EFLAGS: 00000286 RAX: db3c9fb1a05c6600 RBX: ffff8880b8625540 RCX: ffffffff81cb486c RDX: 0000000000000000 RSI: ffffffff8e69c63c RDI: 0000000000000001 RBP: ffffc90000007dd0 R08: ffffffff905fdf77 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: fffffbfff20bfbef R12: ffffffff8a0d3210 R13: ffffc90000007d20 R14: ffff88807d9c2030 R15: ffff88807d9c2010 FS: 00007fcf4177d6c0(0000) GS:ffff888124f96000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30e16ff8 CR3: 0000000033a0e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: expire_timers kernel/time/timer.c:1839 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x65e/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 42 d5 5e f5 e8 4d 95 99 f5 fb bf 01 00 00 00 32 a5 ff ff 43 80 3c 26 00 74 08 4c 89 ff e8 63 cd fb f5 48 c7 RSP: 0000:ffffc90004687dc0 EFLAGS: 00000286 RAX: db3c9fb1a05c6600 RBX: 1ffff920008d0fc0 RCX: ffffffff81cb486c RDX: 0000000000000000 RSI: ffffffff8e69c63c RDI: 0000000000000001 RBP: ffffc90004687e70 R08: ffffffff905fdf77 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: fffffbfff20bfbef R12: dffffc0000000000 R13: 1ffff920008d0fb8 R14: 1ffff920008d0fbc R15: ffffc90004687de0 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:exit_to_user_mode_loop kernel/entry/common.c:101 [inline] RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] RIP: 0010:irqentry_exit_to_user_mode+0x57/0x250 kernel/entry/common.c:231 Code: cd 01 00 00 e8 ba 10 00 00 65 4c 8b 3c 25 08 a0 68 93 49 8b 1f f7 c3 1e 30 02 00 0f 84 b2 00 00 00 e8 ad ba 9a f5 fb f6 c3 18 <74> 05 e8 e2 1c 01 00 f7 c3 00 10 00 00 74 08 4c 89 f7 e8 02 a0 ca RSP: 0000:ffffc90004687f30 EFLAGS: 00000202 RAX: db3c9fb1a05c6600 RBX: 0000000000000008 RCX: ffffffff81cb486c RDX: 0000000000000000 RSI: ffffffff8e69c63c RDI: ffffffff8ca1b620 RBP: 0000000000000000 R08: ffffffff905fdf77 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: fffffbfff20bfbef R12: 0000000000000000 R13: 0000000000000000 R14: ffffc90004687f58 R15: ffff888034215a00 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7fcf4085cf7d Code: 00 00 00 64 f0 83 04 25 90 ff ff ff 01 64 48 8b 04 25 00 00 00 00 48 8d b8 c8 fe ff ff e8 5b c1 0c 00 85 c0 0f 84 a3 01 00 00 <64> f0 83 2c 25 90 ff ff ff 01 e8 a4 9b 0b 00 48 8b 0c 24 8b 00 48 RSP: 002b:00007fcf4177d060 EFLAGS: 00000202 RAX: 000000000000000c RBX: 00007fcf40ba6080 RCX: 00007fcf40a0e2a0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007fcf40a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fcf40ba6080 R15: 00007ffe426b6618 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5913 Comm: kworker/u8:7 Not tainted 6.14.0-syzkaller-g9bae8f4f2168 #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:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x1bac/0x2d40 kernel/smp.c:885 Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 c8 e2 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 78 de 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00 RSP: 0018:ffffc90004467640 EFLAGS: 00000293 RAX: ffffffff81b778ed RBX: 1ffff110170c823d RCX: ffff88802e503c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90004467840 R08: ffffffff81b778b8 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: fffffbfff20bfbef R12: ffff8880b873ad08 R13: ffff8880b86411e8 R14: ffff8880b873ad00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125096000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0e877a6038 CR3: 000000000eb38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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_disable_cpuslocked+0xd2/0x1c0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1b1/0x250 mm/kfence/core.c:855 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