watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.120:6312] Modules linked in: irq event stamp: 11304843 hardirqs last enabled at (11304842): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11304843): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10921052): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10921052): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10921052): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10921055): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10921055): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10921055): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6312 Comm: syz.4.120 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 RIP: 0010:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5943 Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 89 64 1f 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90000007158 EFLAGS: 00000206 RAX: c83a4f086473a800 RBX: 0000000000000001 RCX: c83a4f086473a800 RDX: ffff8880309a5a00 RSI: ffffffff8d9350da RDI: ffffffff8bc1cde0 RBP: 00000000ffffffff R08: ffffc90000007420 R09: ffffc90000007430 R10: ffffc90000007280 R11: fffff52000000e52 R12: 0000000000000246 R13: ffff8880309a5a00 R14: ffffffff8df3b860 R15: 0000000000000002 FS: 00007f72394e16c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f72394c0d58 CR3: 00000000648a0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __find_rr_leaf+0x345/0x6d0 net/ipv6/route.c:834 find_rr_leaf net/ipv6/route.c:890 [inline] rt6_select net/ipv6/route.c:934 [inline] fib6_table_lookup+0x39f/0xa80 net/ipv6/route.c:2230 ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2266 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2335 [inline] ip6_route_input+0x6ce/0xa50 net/ipv6/route.c:2631 ip6_rcv_finish+0x141/0x2d0 net/ipv6/ip6_input.c:77 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5887 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6000 process_backlog+0x60e/0x14f0 net/core/dev.c:6352 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 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: 0018:ffffc90019c37960 EFLAGS: 00000286 RAX: c83a4f086473a800 RBX: 0000000000000000 RCX: c83a4f086473a800 RDX: 0000000000000006 RSI: ffffffff8d749f78 RDI: 0000000000000001 RBP: ffffc90019c37a10 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92003386f2c 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:perf_trace_init+0xa2/0x2d0 kernel/trace/trace_event_perf.c:223 Code: e0 e8 f9 8d 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 43 bc f6 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d RSP: 0018:ffffc90019c37ad8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8f57e500 RCX: 0000000000080000 RDX: ffffc9000ceba000 RSI: 00000000000003ea RDI: 00000000000003eb RBP: 0000000000000002 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 000000000000105e R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000156 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10729 perf_try_init_event+0x176/0x860 kernel/events/core.c:12300 perf_init_event kernel/events/core.c:12398 [inline] perf_event_alloc+0x12bb/0x29b0 kernel/events/core.c:12672 __do_sys_perf_event_open kernel/events/core.c:13171 [inline] __se_sys_perf_event_open+0x6db/0x1c80 kernel/events/core.c:13061 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: 0033:0x7f723858e969 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:00007f72394e1038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f72387b5fa0 RCX: 00007f723858e969 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000500 RBP: 00007f7238610ab1 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f72387b5fa0 R15: 00007fff8c55d318 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6324 Comm: kworker/u8:9 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 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:ffffc90019a67700 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff888026bf1e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90019a67860 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: 00007fae17e9e020 CR3: 000000000dd36000 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+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