vkms_vblank_simulate: vblank timer overrun watchdog: BUG: soft lockup - CPU#0 stuck for 234s! [kworker/u8:9:3469] Modules linked in: irq event stamp: 18590565 hardirqs last enabled at (18590564): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (18590564): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (18590565): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (18590558): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (18590558): [] handle_softirqs+0x5bb/0x8f0 kernel/softirq.c:589 softirqs last disabled at (18590561): [] __do_softirq kernel/softirq.c:595 [inline] softirqs last disabled at (18590561): [] invoke_softirq kernel/softirq.c:435 [inline] softirqs last disabled at (18590561): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662 CPU: 0 UID: 0 PID: 3469 Comm: kworker/u8:9 Not tainted 6.13.0-rc2-syzkaller-00292-ga446e965a188 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x20 kernel/kcov.c:320 Code: 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 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 48 8b 0c 24 <48> 89 f2 48 89 fe bf 07 00 00 00 e9 f8 fd ff ff 0f 1f 84 00 00 00 RSP: 0018:ffffc90000007b70 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffc9001c4ff790 RCX: ffffffff893d0e4b RDX: ffff888032b5bc00 RSI: fffffff0a3da8872 RDI: 00051eb851eb851e RBP: ffff888077179b00 R08: 0000000000000005 R09: 00000000000f4240 R10: 0000000000989680 R11: 0000000000000007 R12: fffffff0a3da8872 R13: 0000000000000000 R14: 00051eb851eb851e R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bd20000 CR3: 000000000df7e000 CR4: 0000000000350ef0 Call Trace: pie_calculate_probability+0x2fb/0x850 net/sched/sch_pie.c:362 fq_pie_timer+0x215/0x5a0 net/sched/sch_fq_pie.c:398 call_timer_fn+0x1a3/0x610 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers+0x6e8/0x930 kernel/time/timer.c:2418 __run_timer_base kernel/time/timer.c:2430 [inline] __run_timer_base kernel/time/timer.c:2422 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2439 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449 handle_softirqs+0x216/0x8f0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 7e 60 e8 a3 ff ff ff 31 c0 e9 37 3e b6 09 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 44 d7 69 7e 65 8b 05 45 d7 69 7e a9 00 01 RSP: 0018:ffffc9000cc07990 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880b8744b80 RCX: ffffffff818df4ec RDX: ffff888032b5bc00 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000006 R12: ffffed10170e8971 R13: 0000000000000001 R14: ffff8880b8744b88 R15: ffff8880b863ff80 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0x456/0x1300 kernel/smp.c:884 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2114 [inline] text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2324 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline] text_poke_flush arch/x86/kernel/alternative.c:2512 [inline] text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2522 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x1d7/0x400 kernel/jump_label.c:920 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:849 [inline] toggle_allocation_gate+0xfc/0x260 mm/kfence/core.c:841 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 18033 Comm: syz-executor Not tainted 6.13.0-rc2-syzkaller-00292-ga446e965a188 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:448 [inline] RIP: 0010:__lock_acquire+0xd2c/0x3c40 kernel/locking/lockdep.c:5214 Code: 24 98 29 d8 8b 5c 24 68 31 d8 8b 5c 24 58 89 c2 29 c1 c1 c2 06 31 ca 01 d8 29 d3 89 d9 89 d3 01 c2 c1 c3 08 31 cb 89 d9 29 d8 <01> d3 c1 c1 10 89 de 31 c8 89 c1 29 c2 01 d8 c1 c9 0d 31 d1 89 ca RSP: 0018:ffffc90000a18af0 EFLAGS: 00000087 RAX: 0000000098254c82 RBX: 0000000079aac84d RCX: 0000000079aac84d RDX: 0000000016fc6da9 RSI: 0000000000000008 RDI: ffffffff96e49120 RBP: ffffffff96e4e798 R08: 0000000000000000 R09: fffffbfff2dc9198 R10: ffffffff96e48cc7 R11: 0000000000000002 R12: ffffed1006a9615b R13: ffff8880354b0000 R14: 0000000000000002 R15: ffff8880354b0b30 FS: 0000555555820500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e31eff8 CR3: 000000006bb1c000 CR4: 0000000000350ef0 Call Trace: lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 debug_object_deactivate+0x13b/0x370 lib/debugobjects.c:873 debug_hrtimer_deactivate kernel/time/hrtimer.c:433 [inline] debug_deactivate kernel/time/hrtimer.c:475 [inline] __run_hrtimer kernel/time/hrtimer.c:1707 [inline] __hrtimer_run_queues+0x47c/0xae0 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x112/0x400 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x20 kernel/kcov.c:320 Code: 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 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 48 8b 0c 24 <48> 89 f2 48 89 fe bf 07 00 00 00 e9 f8 fd ff ff 0f 1f 84 00 00 00 RSP: 0018:ffffc9000caf6b08 EFLAGS: 00000202 RAX: ffffe8ffffc2c280 RBX: 0000000000000001 RCX: ffffffff81dcd89a RDX: 0000000000000008 RSI: 0000000000000001 RDI: 0000000000000007 RBP: 0000000000000008 R08: 0000000000000001 R09: ffffe8ffffc2c280 R10: ffffe8ffffc2c287 R11: 0000000000000000 R12: 0000000000000001 R13: ffffed1004556c90 R14: ffff888022ab6400 R15: dffffc0000000000 find_next_bit include/linux/find.h:62 [inline] pcpu_alloc_noprof+0x8ba/0x1680 mm/percpu.c:1899 fib_nh_common_init+0xa7/0x2d0 net/ipv4/fib_semantics.c:569 fib_nh_init+0xbd/0x460 net/ipv4/fib_semantics.c:608 fib_create_info+0x277d/0x5080 net/ipv4/fib_semantics.c:1472 fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1231 fib_magic+0x4d6/0x5c0 net/ipv4/fib_frontend.c:1112 fib_add_ifaddr+0x393/0x560 net/ipv4/fib_frontend.c:1149 fib_netdev_event+0x38a/0x710 net/ipv4/fib_frontend.c:1494 notifier_call_chain+0xba/0x410 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8988 dev_change_flags+0x10c/0x160 net/core/dev.c:9026 do_setlink.constprop.0+0x69c/0x3f70 net/core/rtnetlink.c:3109 rtnl_changelink net/core/rtnetlink.c:3723 [inline] __rtnl_newlink net/core/rtnetlink.c:3874 [inline] rtnl_newlink+0x1303/0x1d60 net/core/rtnetlink.c:4011 rtnetlink_rcv_msg+0x95e/0xea0 net/core/rtnetlink.c:6921 netlink_rcv_skb+0x16e/0x440 net/netlink/af_netlink.c:2542 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x53f/0x7f0 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] __sys_sendto+0x48b/0x4f0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f094c187bac Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b RSP: 002b:00007ffef95529c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f094cea4620 RCX: 00007f094c187bac RDX: 0000000000000020 RSI: 00007f094cea4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffef9552a14 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f094cea4670 R15: 0000000000000000