rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10508 ticks this GP) idle=c52c/1/0x4000000000000000 softirq=18150/18152 fqs=5246 rcu: hardirqs softirqs csw/system rcu: number: 1320923 0 0 rcu: cputime: 18580 33898 66 ==> 52510(ms) rcu: (t=10503 jiffies g=18817 q=601 ncpus=2) CPU: 1 PID: 6998 Comm: syz.2.342 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 1b 79 ce f6 65 8b 05 ec af 75 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900001eff20 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 1d8de00953779300 RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 0000000000000001 RBP: ffffc900001effb0 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: dffffc0000000000 R13: ffff888078898070 R14: ffffffff974eca78 R15: 1ffff9200003dfe4 FS: 00007f1be39176c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 000000006075b000 CR4: 00000000003506e0 Call Trace: debug_object_activate+0x304/0x4f0 lib/debugobjects.c:727 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline] __call_rcu_common kernel/rcu/tree.c:2706 [inline] call_rcu+0xa6/0x950 kernel/rcu/tree.c:2837 refdst_drop include/net/dst.h:270 [inline] skb_dst_drop include/net/dst.h:282 [inline] __dev_queue_xmit+0x983/0x36b0 net/core/dev.c:4393 dev_queue_xmit_accel include/linux/netdevice.h:3119 [inline] macvlan_queue_xmit drivers/net/macvlan.c:562 [inline] macvlan_start_xmit+0x2ff/0x670 drivers/net/macvlan.c:586 __netdev_start_xmit include/linux/netdevice.h:4943 [inline] netdev_start_xmit include/linux/netdevice.h:4957 [inline] xmit_one net/core/dev.c:3632 [inline] dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3648 __dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4438 neigh_output include/net/neighbour.h:543 [inline] ip6_finish_output2+0xe3d/0x1630 net/ipv6/ip6_output.c:141 dst_output include/net/dst.h:467 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] ndisc_send_skb+0xc26/0x14f0 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x542/0x800 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255 Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 f0 a3 30 09 e8 8b 22 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc900192b7878 EFLAGS: 00000286 RAX: 1d8de00953779300 RBX: 0000000000000000 RCX: 1d8de00953779300 RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c81e0 RBP: ffffc900192b78d0 R08: ffffffff8e8addef R09: 1ffffffff1d15bbd R10: dffffc0000000000 R11: fffffbfff1d15bbe R12: ffff888027c43c00 R13: dffffc0000000000 R14: ffff888025901e00 R15: ffff8880b8f3cac8 context_switch kernel/sched/core.c:5384 [inline] __schedule+0x155b/0x45a0 kernel/sched/core.c:6700 schedule+0xbd/0x170 kernel/sched/core.c:6774 futex_wait_queue+0x138/0x1b0 kernel/futex/waitwake.c:355 futex_wait+0x1ec/0x5e0 kernel/futex/waitwake.c:656 do_futex+0x2ff/0x3e0 kernel/futex/syscalls.c:134 __do_sys_futex kernel/futex/syscalls.c:211 [inline] __se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1be299bf79 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:00007f1be39170e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f1be2c15fa8 RCX: 00007f1be299bf79 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1be2c15fa8 RBP: 00007f1be2c15fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1be2c16038 R14: 00007ffcb0bbeb20 R15: 00007ffcb0bbec08