Illegal XDP return value 1146576387, expect packet loss!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 18 at net/core/filter.c:3649 bpf_warn_invalid_xdp_action net/core/filter.c:3649 [inline]
WARNING: CPU: 1 PID: 18 at net/core/filter.c:3649 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3645
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3649 [inline]
RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3645
RSP: 0018:ffff8880a98df440 EFLAGS: 00010282
RAX: 0000000000000038 RBX: 0000000044575e03 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86ac07e0 RDI: ffffed101531be7e
RBP: ffffffff8738d700 R08: 0000000000000038 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000044575e03
R13: 0000000000000000 R14: ffff88808e8f6546 R15: ffff88808e8f6504
 netif_receive_generic_xdp net/core/dev.c:3959 [inline]
 do_xdp_generic.part.0+0x513/0x9e0 net/core/dev.c:4004
 do_xdp_generic net/core/dev.c:4042 [inline]
 netif_rx_internal+0x330/0x800 net/core/dev.c:4042
 dev_forward_skb+0x39/0x50 net/core/dev.c:1870
 veth_xmit+0xf1/0x300 drivers/net/veth.c:114
 __netdev_start_xmit include/linux/netdevice.h:4039 [inline]
 netdev_start_xmit include/linux/netdevice.h:4048 [inline]
 xmit_one net/core/dev.c:3009 [inline]
 dev_hard_start_xmit+0x186/0x890 net/core/dev.c:3025
 __dev_queue_xmit+0x1d91/0x25c0 net/core/dev.c:3525
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x50a/0x8b0 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:500 [inline]
 ip6_finish_output2+0x992/0x2150 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
 ndisc_send_ns+0x360/0x7e0 net/ipv6/ndisc.c:625
 addrconf_dad_work+0xa81/0xfc0 net/ipv6/addrconf.c:4004
 process_one_work+0x813/0x1540 kernel/workqueue.c:2116
 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..