Illegal XDP return value 4294967274, expect packet loss! ------------[ cut here ]------------ WARNING: CPU: 0 PID: 13838 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action net/core/filter.c:3647 [inline] WARNING: CPU: 0 PID: 13838 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3643 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 13838 Comm: syz-executor.3 Not tainted 4.14.259-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 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:964 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3647 [inline] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3643 RSP: 0018:ffff888097d77660 EFLAGS: 00010282 RAX: 0000000000000038 RBX: 1ffff11012faeed5 RCX: 0000000000000000 RDX: 000000000000f13f RSI: ffffffff81442c40 RDI: ffffed1012faeec2 RBP: ffffffff88564880 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea R13: ffffc90005bca000 R14: 0000000000000000 R15: ffff8880aa0b95c6 netif_receive_generic_xdp+0x554/0x950 net/core/dev.c:3956 do_xdp_generic.part.0+0x22/0xc0 net/core/dev.c:4001 do_xdp_generic net/core/dev.c:4039 [inline] netif_rx_internal+0x219/0x800 net/core/dev.c:4039 __bpf_rx_skb_no_mac net/core/filter.c:1689 [inline] __bpf_redirect_no_mac net/core/filter.c:1733 [inline] __bpf_redirect+0x3e6/0x9c0 net/core/filter.c:1756 ____bpf_clone_redirect net/core/filter.c:1787 [inline] bpf_clone_redirect+0x1e1/0x2c0 net/core/filter.c:1759 ___bpf_prog_run+0x252b/0x5a70 kernel/bpf/core.c:1088 Kernel Offset: disabled Rebooting in 86400 seconds..