------------[ cut here ]------------
Illegal XDP return value 4294967274, expect packet loss!
WARNING: CPU: 0 PID: 5 at net/core/filter.c:7193 bpf_warn_invalid_xdp_action net/core/filter.c:7193 [inline]
WARNING: CPU: 0 PID: 5 at net/core/filter.c:7193 bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7189
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.9.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x347/0x7c0 kernel/panic.c:231
 __warn.cold+0x20/0x46 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:7193 [inline]
RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7189
Code: 80 e7 ff 88 41 83 fc 04 48 c7 c6 c0 e7 ff 88 48 0f 46 ee e8 33 97 2d fb 44 89 e2 48 c7 c7 00 e8 ff 88 48 89 ee e8 a3 9a fe fa <0f> 0b 5b 5d 41 5c e9 16 97 2d fb 66 0f 1f 44 00 00 41 57 41 56 49
RSP: 0018:ffffc90000007a88 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880a95e2140 RSI: ffffffff815db9a7 RDI: fffff52000000f43
RBP: ffffffff88ffe780 R08: 0000000000000001 R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000003043 R12: 00000000ffffffea
R13: 0000000000000001 R14: 0000000000000608 R15: ffffc90000007c78
 netif_receive_generic_xdp+0xe58/0x1760 net/core/dev.c:4692
 do_xdp_generic net/core/dev.c:4740 [inline]
 do_xdp_generic net/core/dev.c:4733 [inline]
 __netif_receive_skb_core+0x11ee/0x3690 net/core/dev.c:5112
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5284
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5400
 process_backlog+0x2e1/0x8e0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x4f8/0xf90 net/core/dev.c:6758
 __do_softirq+0x1f7/0xa91 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:343 [inline]
 do_softirq+0x154/0x1b0 kernel/softirq.c:330
 __local_bh_enable_ip+0x196/0x1f0 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip6_finish_output2+0x913/0x1780 net/ipv6/ip6_output.c:118
 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline]
 __ip6_finish_output+0x447/0xab0 net/ipv6/ip6_output.c:128
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ndisc_send_skb+0xa69/0x1720 net/ipv6/ndisc.c:506
 ndisc_send_ns+0x3a9/0x850 net/ipv6/ndisc.c:648
 addrconf_dad_work+0xc1c/0x1280 net/ipv6/addrconf.c:4115
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..