rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4189 P4397 1-.... } 2928 jiffies s: 11469 root: 0x2/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4397 Comm: syz.2.88 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:strlen+0x2d/0x60 lib/string.c:495
Code: 56 41 54 53 49 89 fe 48 c7 c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 49 89 c4 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 00 75 dd eb 13
RSP: 0018:ffffc900001dff38 EFLAGS: 00000806
RAX: 0000000000000005 RBX: ffffffff8b0df211 RCX: 000000008b0df200
RDX: 0000000000000000 RSI: ffffffff8d3440c8 RDI: ffffffff8b0df200
RBP: ffffc900001e0080 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000010
R13: ffffffff8d1f72a0 R14: ffffffff8b0df200 R15: dffffc0000000000
FS:  00007f50c72a16c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000d000 CR3: 000000001ab5f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline]
 perf_trace_lock_acquire+0x114/0x4a0 include/trace/events/lock.h:24
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x544/0x5a0 kernel/locking/lockdep.c:5633
 seqcount_lockdep_reader_access+0xf8/0x220 include/linux/seqlock.h:102
 ktime_get_update_offsets_now+0x38/0x420 kernel/time/timekeeping.c:2317
 hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
 hrtimer_interrupt+0x12f/0x980 kernel/time/hrtimer.c:1794
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__dev_queue_xmit+0x16e2/0x3cf0 net/core/dev.c:4259
Code: 94 ad ef f8 45 84 ed 0f 85 65 0d 00 00 e8 86 ad ef f8 4c 8b 6c 24 08 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 78 0f b6 04 01 <84> c0 0f 85 8e 10 00 00 44 89 ac 24 d0 01 00 00 e8 b9 7a 0a 02 89
RSP: 0018:ffffc900001e0520 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 1ffff9200003c0de
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0770 R08: ffffffff889aff7d R09: ffffed1003ecbc2c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801f65e000
R13: 0000000000000000 R14: 0000000000000174 R15: 00000000000000c0
 dev_queue_xmit include/linux/netdevice.h:3021 [inline]
 neigh_hh_output include/net/neighbour.h:528 [inline]
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0xea9/0x1530 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:201 [inline]
 ip6_finish_output+0x6a0/0xa80 net/ipv6/ip6_output.c:212
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbab/0x14e0 net/ipv6/ndisc.c:511
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 do_softirq+0x162/0x240 kernel/softirq.c:472
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1b1/0x1f0 kernel/softirq.c:396
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 __fib6_clean_all+0x323/0x4b0 net/ipv6/ip6_fib.c:2262
 rt6_sync_down_dev net/ipv6/route.c:4902 [inline]
 rt6_disable_ip+0x14c/0x890 net/ipv6/route.c:4907
 addrconf_ifdown+0x154/0x1b90 net/ipv6/addrconf.c:3782
 addrconf_notify+0x3ec/0xf60
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 call_netdevice_notifiers_mtu+0x189/0x220 net/core/dev.c:2045
 dev_set_mtu_ext+0x4b0/0x690 net/core/dev.c:8727
 do_setlink+0x987/0x3de0 net/core/rtnetlink.c:2764
 __rtnl_newlink net/core/rtnetlink.c:3576 [inline]
 rtnl_newlink+0x172c/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6121