watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.17:5989] Modules linked in: irq event stamp: 14808047 hardirqs last enabled at (14808046): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (14808047): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (14766972): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (14766972): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (14766972): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (14766975): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (14766975): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (14766975): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5989 Comm: syz.1.17 Not tainted 6.15.0-syzkaller-gdf3bed9ea576 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__find_rr_leaf+0x12d/0x6d0 net/ipv6/route.c:838 Code: 44 24 68 4c 89 7c 24 30 4d 85 ff 74 3c 49 8d 9e 90 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 7e 03 00 00 8b 1b <89> df 44 8b 64 24 44 44 89 e6 e8 84 f5 a3 f7 44 39 e3 0f 85 07 04 RSP: 0018:ffffc90000007180 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffff888078255a00 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900000072d8 R08: ffffc90000007400 R09: ffffc90000007410 R10: ffffc90000007260 R11: fffff52000000e4e R12: 1ffff1100ad58b8c R13: dffffc0000000000 R14: ffff88823be10000 R15: ffffc900000073d8 FS: 00007f31359d56c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f31359b3f98 CR3: 000000001183e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000f3060a Call Trace: 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:2232 ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2268 pol_lookup_func include/net/ip6_fib.h:617 [inline] fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2337 [inline] ip6_route_input+0x6ce/0xa50 net/ipv6/route.c:2640 ip6_rcv_finish+0x141/0x2d0 net/ipv6/ip6_input.c:77 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:317 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6090 process_backlog+0x60e/0x14f0 net/core/dev.c:6442 __napi_poll+0xc7/0x480 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7605 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:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:745 Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 90 0b f5 10 e8 3b 9d bd 09 <89> c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 60 RSP: 0018:ffffc900050f7920 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 305c9277fe2ce500 RDX: 0000000000000000 RSI: ffffffff8be26f20 RDI: ffffffff8be26ee0 RBP: ffffc900050f7b70 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: ffff8880291d8000 R13: dffffc0000000000 R14: ffff888078255a00 R15: ffff8880b863b910 trace_sched_exit_tp+0x38/0x120 include/trace/events/sched.h:888 __schedule+0x1713/0x4d00 kernel/sched/core.c:6787 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7104 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:perf_unpin_context+0x0/0x70 kernel/events/core.c:1521 Code: c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 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> 56 53 48 89 fb e8 c5 7a d0 ff 48 89 df e8 bd 49 77 09 48 8d 8b RSP: 0018:ffffc900050f7cf8 EFLAGS: 00000246 RAX: 305c9277fe2ce500 RBX: ffff88803057d400 RCX: 0000000000080000 RDX: ffffc9000cddd000 RSI: 0000000000002c89 RDI: ffff88803057d400 RBP: ffffc900050f7ee0 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: ffff88803057d550 R13: ffff888055e53e80 R14: ffff888078255a00 R15: 1ffff92000a1efb0 __do_sys_perf_event_open kernel/events/core.c:13677 [inline] __se_sys_perf_event_open+0x1942/0x1d70 kernel/events/core.c:13318 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: 0033:0x7f3137b8e969 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:00007f31359d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f3137db6080 RCX: 00007f3137b8e969 RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f3137c10ab1 R08: 0000000000000003 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3137db6080 R15: 00007fff8efc97e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5931 Comm: kworker/u8:9 Not tainted 6.15.0-syzkaller-gdf3bed9ea576 #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:lock_is_held_type+0x57/0x190 kernel/locking/lockdep.c:-1 Code: fe 00 00 00 65 8b 05 28 c4 37 07 85 c0 0f 85 ef 00 00 00 65 4c 8b 2c 25 08 10 9c 92 41 83 bd ec 0a 00 00 00 0f 85 d8 00 00 00 <89> f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 fa RSP: 0018:ffffc90000a08898 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 67f45ccc860b4300 RDX: ffff888025c85a00 RSI: 00000000ffffffff RDI: ffffffff8e13d080 RBP: ffffc90000a089d8 R08: ffffc90000a0896f R09: 0000000000000000 R10: ffffc90000a08960 R11: fffff5200014112e R12: 0000000000000001 R13: ffff888025c85a00 R14: ffff888078295480 R15: ffffffff8e19e568 FS: 0000000000000000(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff8f430fdc CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: bpf_prog_run_array include/linux/bpf.h:2223 [inline] trace_call_bpf+0x1f4/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10881 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x280/0x340 include/trace/events/preemptirq.h:14 __do_trace_irq_disable include/trace/events/preemptirq.h:36 [inline] trace_irq_disable+0xee/0x110 include/trace/events/preemptirq.h:36 seqcount_lockdep_reader_access+0xea/0x1c0 include/linux/seqlock.h:71 get_jiffies_update+0x44/0x140 kernel/time/tick-sched.c:873 tmigr_handle_remote+0x28b/0x13d0 kernel/time/timer_migration.c:1084 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_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 60 78 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 74 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 f0 73 0b RSP: 0018:ffffc90004f876a0 EFLAGS: 00000293 RAX: ffffffff81b4c6f0 RBX: ffff8880b873cb40 RCX: ffff888025c85a00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90004f87800 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 1ffff110170c86b5 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86435a8 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:2660 [inline] smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2870 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+0x711/0x8a0 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