ip6_tunnel: ip6gretap0 xmit: Local address not yet configured! rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=49705, q=370 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295003351-4294992849), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10502 jiffies! g49705 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:27672 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x116a/0x5de0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:6878 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2054 rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2256 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:rb_erase_cached include/linux/rbtree.h:126 [inline] RIP: 0010:timerqueue_del+0x73/0x150 lib/timerqueue.c:57 Code: e8 22 0f 40 f6 4c 8d 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 a3 00 00 00 48 39 5d 08 74 58 f8 0e 40 f6 48 89 ee 48 89 df e8 9d 70 ff ff 48 89 da 48 b8 00 RSP: 0018:ffffc90000007de0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff888022f60340 RCX: 1ffff11017084fbb RDX: dffffc0000000000 RSI: ffffffff8b7c0e10 RDI: ffff888022f60348 RBP: ffff8880b8427dd0 R08: 0000000000000006 R09: 0000000000000001 R10: ffff888022f60340 R11: 0000000000000001 R12: ffff8880b8427dd8 R13: 0000000000000000 R14: ffff8880b8427c80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124754000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2724bf CR3: 000000005f07a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1121 __run_hrtimer kernel/time/hrtimer.c:1741 [inline] __hrtimer_run_queues+0x4f9/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5264 Code: fb 09 00 00 44 8b 05 89 62 1e 0f 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 8f 0e 3a 00 fb 65 48 8b 1d 3e e1 42 12 <48> 8d bb 18 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc900000e7428 EFLAGS: 00000206 RAX: 0000000000041b65 RBX: ffff88801cafc880 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff8de19624 RDI: ffffffff8c1570a0 RBP: ffffc900000e7470 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90a80f57 R11: 0000000000000001 R12: ffff8880b843bc80 R13: ffff88801e2bc880 R14: ffff88801cafc880 R15: ffff8880b843caf0 context_switch kernel/sched/core.c:5399 [inline] __schedule+0x1172/0x5de0 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:6878 usb_kill_urb drivers/usb/core/urb.c:713 [inline] usb_kill_urb+0x253/0x320 drivers/usb/core/urb.c:699 usb_start_wait_urb+0x250/0x4b0 drivers/usb/core/message.c:65 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154 get_bMaxPacketSize0.constprop.0+0xd0/0x1f0 drivers/usb/core/hub.c:4819 hub_port_init+0x690/0x3a70 drivers/usb/core/hub.c:5015 hub_port_connect drivers/usb/core/hub.c:5464 [inline] hub_port_connect_change drivers/usb/core/hub.c:5675 [inline] port_event drivers/usb/core/hub.c:5835 [inline] hub_event+0x2c67/0x4fa0 drivers/usb/core/hub.c:5917 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245