IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (5 ticks this GP) idle=a654/1/0x4000000000000000 softirq=208105/208107 fqs=2 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P26251/1:b..l rcu: (detected by 1, t=10502 jiffies, g=233977, q=416 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 26261 Comm: syz.5.6281 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:118 [inline] RIP: 0010:lock_acquire+0x8b/0x350 kernel/locking/lockdep.c:5844 Code: 0f 84 ca 01 00 00 83 3d 42 c5 8e 0e 00 0f 84 d3 00 00 00 48 8b b4 24 90 00 00 00 4c 89 ef e8 bc 3e 8f 00 83 3d 25 c5 8e 0e 00 <0f> 84 ce 00 00 00 65 8b 05 e8 9f 96 11 85 c0 0f 85 bf 00 00 00 65 RSP: 0000:ffffc90000007cc8 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000010205 RDX: 0000000000000000 RSI: ffffffff8baa2100 RDI: 1ffffffff34cda7e RBP: ffffffff84bc92fc R08: 0000000000000001 R09: 0000000000000000 R10: ffff88803d8d1308 R11: ffffed1007b1a263 R12: 0000000000000000 R13: ffffffff9a66d3f0 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f6bbb5706c0(0000) GS:ffff8881252a0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000271030 CR3: 000000005b3a8000 CR4: 00000000003526f0 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166 debug_object_deactivate+0x6c/0x3a0 lib/debugobjects.c:900 debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline] __run_hrtimer kernel/time/hrtimer.c:1898 [inline] __hrtimer_run_queues+0x23a/0xa20 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198 Code: f7 e8 ad 28 f8 f5 f7 c3 00 02 00 00 74 05 e8 b0 c2 23 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c4 a7 e9 f5 65 8b 05 8d dd 8d 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0000:ffffc9000421eee8 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000282 RCX: 0000000000000202 RDX: 0000000000000002 RSI: ffffffff8dfa4ecb RDI: 0000000000000001 RBP: ffffc9000421f1d0 R08: ffffffff903037f7 R09: 1ffffffff20606fe R10: dffffc0000000000 R11: fffffbfff20606ff R12: ffff88803d8d1290 R13: dffffc0000000000 R14: ffff88803d8d12a8 R15: ffff88803d8d12f8 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] taprio_change+0x30fe/0x3e50 net/sched/sch_taprio.c:1986 taprio_init+0x96f/0xbe0 net/sched/sch_taprio.c:2125 qdisc_create+0x7c4/0xf20 net/sched/sch_api.c:1319 __tc_modify_qdisc net/sched/sch_api.c:1753 [inline] tc_modify_qdisc+0x16f0/0x2290 net/sched/sch_api.c:1817 rtnetlink_rcv_msg+0x77e/0xbe0 net/core/rtnetlink.c:7006 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 __sys_sendmsg net/socket.c:2784 [inline] __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6bba79ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6bbb570028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6bbaa16090 RCX: 00007f6bba79ce59 RDX: 0000000000008010 RSI: 00002000000012c0 RDI: 0000000000000006 RBP: 00007f6bba832d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6bbaa16128 R14: 00007f6bbaa16090 R15: 00007f6bbab3fa48 task:syz.3.6277 state:R running task stack:22216 pid:26251 tgid:26236 ppid:17116 task_flags:0x400040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1821/0x5740 kernel/sched/core.c:7189 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:110 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x2bb/0x2550 arch/x86/kernel/unwind_orc.c:510 Code: 17 04 00 00 4a 8d 14 ad a4 b3 42 90 45 29 e8 4a 8d 1c 82 48 83 c3 fc 49 89 d5 48 39 da 0f 86 1c 02 00 00 49 29 d5 49 c1 fd 02 <4a> 8d 04 6d 00 00 00 00 4c 01 e8 48 8d 14 46 48 bd 00 00 00 00 00 RSP: 0000:ffffc900039b66f8 EFLAGS: 00000246 RAX: ffffffff90a9438c RBX: ffffffff90a94390 RCX: ffffffff90a94394 RDX: ffffffff90a94390 RSI: ffffffff915539f2 RDI: ffffffff8c28b980 RBP: ffffffff90a94394 R08: 0000000000000001 R09: ffffffff8e95cd20 R10: ffffc900039b6818 R11: ffffffff81b0e210 R12: ffffffff8a3ea272 R13: 0000000000000000 R14: ffffc900039b67c8 R15: ffffffff90a94390 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2689 [inline] slab_free mm/slub.c:6251 [inline] kfree+0x1c5/0x640 mm/slub.c:6566 tls_tx_records+0x493/0x5c0 net/tls/tls_sw.c:454 tls_push_record+0x20d7/0x37e0 net/tls/tls_sw.c:860 bpf_exec_tx_verdict+0xf65/0x1640 net/tls/tls_sw.c:880 tls_sw_sendmsg_locked net/tls/tls_sw.c:1224 [inline] tls_sw_sendmsg+0x1656/0x2430 net/tls/tls_sw.c:1302 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] sock_sendmsg+0x267/0x450 net/socket.c:825 splice_to_socket+0xae2/0x11f0 fs/splice.c:884 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x535/0x7d0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbfd4d9ce59 RSP: 002b:00007fbfd27b0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fbfd5016360 RCX: 00007fbfd4d9ce59 RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000a RBP: 00007fbfd4e32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 00000ffffffff004 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbfd50163f8 R14: 00007fbfd5016360 R15: 00007fbfd513fa48 rcu: rcu_preempt kthread starved for 10498 jiffies! g233977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27736 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1821/0x5740 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 23208 Comm: kworker/u8:23 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xfcf/0x13d0 kernel/smp.c:892 Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 aa 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 55 03 0c 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 3a 03 0c RSP: 0018:ffffc90005ccf700 EFLAGS: 00000293 RAX: ffffffff81b9b466 RBX: ffff8880b873c388 RCX: ffff88807a938000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90005ccf840 R08: ffffffff903037f7 R09: 1ffffffff20606fe R10: dffffc0000000000 R11: fffffbfff20606ff R12: 1ffff110170c85d1 R13: dffffc0000000000 R14: ffff8880b8642e88 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881253a0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f39361f5ff8 CR3: 000000000e74a000 CR4: 00000000003526f0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2983 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:906 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available IPVS: dh: UDP 224.0.0.2:0 - no destination available