rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2635 jiffies s: 33629 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5061 Comm: syz-executor.4 Not tainted 6.4.0-rc4-syzkaller-00179-g714069daa5d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:fq_pie_qdisc_dequeue+0xa1/0x9c0 net/sched/sch_fq_pie.c:246
Code: 45 f9 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 19 07 00 00 49 8b 5d 00 48 8d 43 f0 48 89 44 24 08 48 c1 e8 03 42 0f b6 04 20 <84> c0 74 08 3c 03 0f 8e e8 06 00 00 44 8b 7b f0 31 ff 44 89 fe e8
RSP: 0018:ffffc90000007620 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffff8880428ae2f0 RCX: 0000000000000100
RDX: ffff888028c93b80 RSI: ffffffff883efa29 RDI: ffff8880428ae2f8
RBP: ffff888079ed8000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff888079ed82e0 R14: ffff888079ed82f0 R15: 0000000000000001
FS:  0000555556bde400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb98d9831b8 CR3: 000000004b9be000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 dequeue_skb net/sched/sch_generic.c:292 [inline]
 qdisc_restart net/sched/sch_generic.c:397 [inline]
 __qdisc_run+0x1b2/0x1780 net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3868 [inline]
 __dev_queue_xmit+0x2215/0x3b10 net/core/dev.c:4210
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 neigh_connected_output+0x3c2/0x550 net/core/neighbour.c:1581
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0x55a/0x1560 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:458 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718
 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__local_bh_enable_ip+0xac/0x130 kernel/softirq.c:403
Code: 1d 11 eb b5 7e 65 8b 05 0a eb b5 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 f1 5a 0a 00 e8 ec 10 3d 00 fb 65 8b 05 ec ea b5 7e <85> c0 74 58 5b 5d c3 65 8b 05 b2 b5 b4 7e 85 c0 75 a2 0f 0b eb 9e
RSP: 0018:ffffc9000408fa98 EFLAGS: 00000206
RAX: 0000000080000000 RBX: 00000000fffffe00 RCX: 1ffffffff1cf49c1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff88069ec3 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1cf4fca R11: 00000000000005f3 R12: 00000000ffffffa4
R13: ffff8880183ba4c0 R14: 0000000000000041 R15: 0000000000000000
 sockopt_release_sock+0x53/0x70 net/core/sock.c:1066
 do_ip_getsockopt+0x13c4/0x1ee0 net/ipv4/ip_sockglue.c:1775
 ip_getsockopt+0xa0/0x1e0 net/ipv4/ip_sockglue.c:1808
 tcp_getsockopt+0x99/0x100 net/ipv4/tcp.c:4410
 __sys_getsockopt+0x21a/0x6a0 net/socket.c:2317
 __do_sys_getsockopt net/socket.c:2332 [inline]
 __se_sys_getsockopt net/socket.c:2329 [inline]
 __x64_sys_getsockopt+0xbe/0x160 net/socket.c:2329
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb98d88d78a
Code: 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc63f858d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb98d88d78a
RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffc63f85900 R08: 00007ffc63f858fc R09: ffffffffffff0000
R10: 00007ffc63f85960 R11: 0000000000000202 R12: 00007ffc63f85960
R13: 0000000000000003 R14: 00007ffc63f858fc R15: 00007fb98d9873e0
 </TASK>