watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.2.197:6415] Modules linked in: irq event stamp: 20869757 hardirqs last enabled at (20869756): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (20869757): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (15301110): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (15301110): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (15301110): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (15301113): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (15301113): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (15301113): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6415 Comm: syz.2.197 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:addrconf_rs_timer+0x399/0x670 net/ipv6/addrconf.c:4046 Code: 82 4c 01 4c 8d 7b 50 4c 89 7c 24 10 49 c1 ef 03 49 bc 00 00 00 00 00 fc ff df 43 0f b6 04 27 84 c0 0f 85 a4 01 00 00 8b 7b 50 <4c> 8d b3 08 ff ff ff 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f RSP: 0000:ffffc90000007ac0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88802399b708 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000001a0e RBP: ffffc90000007b90 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000f48 R12: dffffc0000000000 R13: 1ffff110047336eb R14: 0000000000000000 R15: 1ffff110047336eb FS: 00007fda232a26c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feee1ff6d00 CR3: 00000000702fe000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __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:7090 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 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0000:ffffc900040aef80 EFLAGS: 00000282 RAX: 9632ba5eb6241a00 RBX: 0000000000000000 RCX: 9632ba5eb6241a00 RDX: 0000000000000000 RSI: ffffffff8d749f78 RDI: 0000000000000001 RBP: ffffc900040af030 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000815df0 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:bpf_vlog_update_len_max kernel/bpf/log.c:56 [inline] RIP: 0010:bpf_verifier_vlog+0xff/0x900 kernel/bpf/log.c:76 Code: 48 85 c0 74 0d e8 91 c3 e1 ff 41 bc ff ff ff ff eb 30 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 50 06 00 00 45 8b 65 00 <48> 89 df 4c 89 e6 e8 c6 c5 e1 ff 4c 39 e3 76 2b e8 5c c3 e1 ff 41 RSP: 0000:ffffc900040af0f8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000050 RCX: ffff8880260a9e00 RDX: 0000000000000002 RSI: 0000000000000050 RDI: 00000000ffffffff RBP: 0000000000000006 R08: ffff88807c7b06a4 R09: 1ffff1100f8f60d4 R10: dffffc0000000000 R11: ffffed100f8f60d5 R12: 000000000000004f R13: ffff88807c7b06a0 R14: ffff88807c7b0680 R15: 000000000000004e verbose+0x10a/0x180 kernel/bpf/verifier.c:367 compute_live_registers+0x163f/0x19a0 kernel/bpf/verifier.c:23889 bpf_check+0x1362c/0x19a70 kernel/bpf/verifier.c:24025 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2971 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda2238e969 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:00007fda232a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fda225b5fa0 RCX: 00007fda2238e969 RDX: 0000000000000094 RSI: 00002000000002c0 RDI: 0000000000000005 RBP: 00007fda22410ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fda225b5fa0 R15: 00007ffd3921c378 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc90000117700 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff88801beada00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000117860 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb272d7866 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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+0x319/0x940 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+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+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 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