------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 0 PID: 2602 at net/core/filter.c:7193 bpf_warn_invalid_xdp_action net/core/filter.c:7193 [inline] WARNING: CPU: 0 PID: 2602 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: 2602 Comm: kworker/0:2 Not tainted 5.9.0-rc1-next-20200819-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:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x4a 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 e5 ff 88 41 83 fc 04 48 c7 c6 c0 e5 ff 88 48 0f 46 ee e8 63 ca 2d fb 44 89 e2 48 c7 c7 00 e6 ff 88 48 89 ee e8 93 aa fe fa <0f> 0b 5b 5d 41 5c e9 46 ca 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: ffff88809f076100 RSI: ffffffff815d90e7 RDI: fffff52000000f43 RBP: ffffffff88ffe580 R08: 0000000000000001 R09: ffff8880ae6318e7 R10: 0000000000000000 R11: 206c6167656c6c49 R12: 00000000ffffffea R13: 0000000000000001 R14: 000000000000dd86 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+0x28d/0x7f0 net/core/dev.c:6242 napi_poll net/core/dev.c:6687 [inline] net_rx_action+0x4a1/0xe80 net/core/dev.c:6757 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __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+0x17b/0x1e0 kernel/softirq.c:330 __local_bh_enable_ip+0x14d/0x190 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+0x91d/0x17b0 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:4129 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..