syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:1:14]
Modules linked in:
irq event stamp: 53912365
hardirqs last  enabled at (53912364): [<ffffffff81549445>] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline]
hardirqs last  enabled at (53912364): [<ffffffff81549445>] read_seqcount_begin include/linux/seqlock.h:164 [inline]
hardirqs last  enabled at (53912364): [<ffffffff81549445>] ktime_get+0x235/0x2f0 kernel/time/timekeeping.c:756
hardirqs last disabled at (53912365): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (222116): [<ffffffff8709031e>] icmp6_dst_alloc+0x3de/0x660 net/ipv6/route.c:2750
softirqs last disabled at (222118): [<ffffffff87020872>] lwtunnel_xmit_redirect include/net/lwtunnel.h:92 [inline]
softirqs last disabled at (222118): [<ffffffff87020872>] ip6_finish_output2+0x1f2/0x2290 net/ipv6/ip6_output.c:106
CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00
RSP: 0018:ffff8880b5a96b80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3051 RBX: ffff8880b5a82380 RCX: 1ffff11016b505b3
RDX: dffffc0000000000 RSI: 000000000000000b RDI: 0000000000000286
RBP: 000000000000000a R08: ffffffff8c665018 R09: 000000000000000a
R10: 0000000000000000 R11: ffffffff8c66501b R12: 1ffff11016b52d73
R13: c732f3392f7b9ade R14: ffff8880b5a82380 R15: 000000000000000b
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48657e8390 CR3: 0000000009e6d000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:176
 spin_unlock include/linux/spinlock.h:369 [inline]
 tcf_police_act+0x786/0xe60 net/sched/act_police.c:268
 tcf_action_exec net/sched/act_api.c:618 [inline]
 tcf_action_exec+0x160/0x400 net/sched/act_api.c:598
 tcf_exts_exec include/net/pkt_cls.h:388 [inline]
 basic_classify+0x184/0x2b0 net/sched/cls_basic.c:52
 tcf_classify+0x120/0x3c0 net/sched/cls_api.c:979
 prio_classify net/sched/sch_prio.c:46 [inline]
 prio_enqueue+0x3bb/0x7a0 net/sched/sch_prio.c:78
 __dev_xmit_skb net/core/dev.c:3494 [inline]
 __dev_queue_xmit+0x140a/0x2e00 net/core/dev.c:3807
 neigh_hh_output include/net/neighbour.h:491 [inline]
 neigh_output include/net/neighbour.h:499 [inline]
 ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230
 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406
 dst_output include/net/dst.h:455 [inline]
 ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125
 iptunnel_xmit+0x63b/0x9d0 net/ipv4/ip_tunnel_core.c:91
 geneve_xmit_skb drivers/net/geneve.c:867 [inline]
 geneve_xmit+0x120d/0x2e60 drivers/net/geneve.c:943
 __netdev_start_xmit include/linux/netdevice.h:4349 [inline]
 netdev_start_xmit include/linux/netdevice.h:4363 [inline]
 xmit_one net/core/dev.c:3256 [inline]
 dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
 neigh_resolve_output+0x55a/0x910 net/core/neighbour.c:1374
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
 dst_output include/net/dst.h:455 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491
 ndisc_send_ns+0x51d/0x840 net/ipv6/ndisc.c:633
 addrconf_dad_work+0xb0e/0x10a0 net/ipv6/addrconf.c:4076
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415