RBP: 00007fc0b5fe7da0 R08: 0000000000000001 R09: 00000006292b3bbf R10: 0000001b2ea20000 R11: 0000000000000246 R12: 00007fc0b5fe5fac R13: 00007fc0b5fe5fa0 R14: ffffffffffffffff R15: 00007ffe292b39e0 watchdog: BUG: soft lockup - CPU#0 stuck for 226s! [syz.2.36:605] Modules linked in: CPU: 0 PID: 605 Comm: syz.2.36 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline] RIP: 0010:smp_call_function_many_cond+0x88e/0x960 kernel/smp.c:998 Code: 75 0a e8 65 60 09 00 e9 38 ff ff ff f3 90 41 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff ff e8 42 60 09 00 e0 44 89 f9 80 e1 07 80 c1 03 38 c1 7c df 4c 89 ff e8 eb 29 4c RSP: 0018:ffffc90000aaf7c0 EFLAGS: 00000293 RAX: ffffffff816501ee RBX: dffffc0000000000 RCX: ffff88810e788000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000aaf8f8 R08: dffffc0000000000 R09: ffffed103ee07163 R10: 0000000000000000 R11: ffffffff81343870 R12: 1ffff1103ee07160 R13: 1ffff1103ee277e9 R14: 0000000000000001 R15: ffff8881f713bf48 FS: 00005555882fd500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001205fe000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1574 [inline] text_poke_bp_batch+0x1cc/0x580 arch/x86/kernel/alternative.c:1774 text_poke_flush arch/x86/kernel/alternative.c:1965 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1972 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:518 jump_label_update+0x39b/0x450 kernel/jump_label.c:864 static_key_disable_cpuslocked+0xc9/0x1a0 kernel/jump_label.c:237 static_key_disable+0x1a/0x30 kernel/jump_label.c:245 tracepoint_remove_func kernel/tracepoint.c:417 [inline] tracepoint_probe_unregister+0x624/0x8b0 kernel/tracepoint.c:551 bpf_probe_unregister+0x61/0x70 kernel/trace/bpf_trace.c:2361 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:3197 bpf_link_free+0x13a/0x390 kernel/bpf/syscall.c:2766 bpf_link_put kernel/bpf/syscall.c:2792 [inline] bpf_link_release+0x15f/0x170 kernel/bpf/syscall.c:2801 __fput+0x1fc/0x8f0 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x1db/0x240 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc0b5d8efc9 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:00007ffe292b38c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000000bedf RCX: 00007fc0b5d8efc9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fc0b5fe7da0 R08: 0000000000000001 R09: 00000006292b3bbf R10: 0000001b2ea20000 R11: 0000000000000246 R12: 00007fc0b5fe5fac R13: 00007fc0b5fe5fa0 R14: ffffffffffffffff R15: 00007ffe292b39e0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 400 Comm: kworker/u4:3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: netns cleanup_net RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline] RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline] RIP: 0010:kvm_wait+0xcc/0x140 arch/x86/kernel/kvm.c:1058 Code: 20 f6 44 24 21 02 75 24 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 48 0f b6 07 40 38 f0 75 a6 66 90 0f 00 2d 15 93 f3 03 f4 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 RSP: 0018:ffffc90000ea6da0 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff8881f7127950 RCX: ffffffff84d3e962 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881f7127950 RBP: ffffc90000ea6e30 R08: dffffc0000000000 R09: ffffed103ee24f2b R10: ffffed103ee24f2b R11: 1ffff1103ee24f2a R12: 1ffff1103ee20001 R13: ffff8881f7138714 R14: dffffc0000000000 R15: 1ffff920001d4db4 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f663fff CR3: 0000000006a0f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0xd8/0xe0 kernel/locking/spinlock.c:154 krc_this_cpu_lock kernel/rcu/tree.c:2995 [inline] add_ptr_to_bulk_krc_lock kernel/rcu/tree.c:3315 [inline] kvfree_call_rcu+0x100/0x7a0 kernel/rcu/tree.c:3406 trie_delete_elem+0x572/0x720 kernel/bpf/lpm_trie.c:545 bpf_prog_5186c38a4019a4cb+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1011 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline] bpf_trace_run3+0x113/0x270 kernel/trace/bpf_trace.c:2325 __bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:53 trace_timer_start include/trace/events/timer.h:53 [inline] enqueue_timer+0x337/0x480 kernel/time/timer.c:609 __mod_timer+0x79f/0xb30 kernel/time/timer.c:-1 add_timer+0x68/0x80 kernel/time/timer.c:1212 __queue_delayed_work+0x173/0x200 kernel/workqueue.c:1679 mod_delayed_work_on+0x74/0xe0 kernel/workqueue.c:1742 mod_delayed_work include/linux/workqueue.h:542 [inline] schedule_delayed_monitor_work kernel/rcu/tree.c:3173 [inline] kvfree_call_rcu+0x560/0x7a0 kernel/rcu/tree.c:3432 drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1731 drop_sysctl_table+0x2de/0x410 fs/proc/proc_sysctl.c:1734 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1769 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:174 neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3877 addrconf_sysctl_unregister net/ipv6/addrconf.c:7207 [inline] addrconf_ifdown+0x1650/0x1910 net/ipv6/addrconf.c:3951 addrconf_notify+0x39f/0xe40 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xa1/0x110 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2001 [inline] call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers net/core/dev.c:2053 [inline] unregister_netdevice_many+0xf8f/0x1820 net/core/dev.c:10990 ip6gre_exit_batch_net+0x5a8/0x5f0 net/ipv6/ip6_gre.c:1670 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x710/0xc60 net/core/net_namespace.c:640 process_one_work+0x71f/0xc40 kernel/workqueue.c:2292 worker_thread+0xa26/0x11e0 kernel/workqueue.c:2439 kthread+0x281/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295