Illegal XDP return value 4294967274, expect packet loss! ------------[ cut here ]------------ WARNING: CPU: 0 PID: 11853 at net/core/filter.c:3646 bpf_warn_invalid_xdp_action net/core/filter.c:3646 [inline] WARNING: CPU: 0 PID: 11853 at net/core/filter.c:3646 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3642 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11853 Comm: syz-executor.0 Not tainted 4.14.232-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: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:964 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3646 [inline] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3642 RSP: 0018:ffff88803ff6f668 EFLAGS: 00010286 RAX: 0000000000000038 RBX: 1ffff11007feded6 RCX: 0000000000000000 RDX: 000000000000cd59 RSI: ffffffff81441a30 RDI: ffffed1007fedec3 RBP: ffffffff88562c80 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea R13: ffffc90005b45000 R14: 0000000000000000 R15: ffff8880aaec7a46 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:1086 Kernel Offset: disabled Rebooting in 86400 seconds..