------------[ cut here ]------------ Illegal XDP return value 4095, expect packet loss! WARNING: CPU: 0 PID: 12 at net/core/filter.c:7929 bpf_warn_invalid_xdp_action net/core/filter.c:7929 [inline] WARNING: CPU: 0 PID: 12 at net/core/filter.c:7929 bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7925 Modules linked in: CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:7929 [inline] RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7925 Code: a0 d8 44 8a 41 83 fc 04 48 c7 c6 e0 d8 44 8a 48 0f 46 ee e8 53 42 72 fa 44 89 e2 48 c7 c7 20 d9 44 8a 48 89 ee e8 15 17 b8 01 <0f> 0b 5b 5d 41 5c e9 36 42 72 fa 66 0f 1f 44 00 00 41 57 41 56 49 RSP: 0018:ffffc90000d17a40 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888010d4d340 RSI: ffffffff815b6b15 RDI: fffff520001a2f3a RBP: ffffffff8a44d8a0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815afcee R11: 0000000000000000 R12: 0000000000000fff R13: ffff88801cfe5000 R14: ffffc90000d17b70 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563f75ca4248 CR3: 000000002954e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: veth_xdp_rcv_skb drivers/net/veth.c:755 [inline] veth_xdp_rcv drivers/net/veth.c:820 [inline] veth_poll+0x1303/0x3120 drivers/net/veth.c:851 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x461/0xe10 net/core/dev.c:6888 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 run_ksoftirqd kernel/softirq.c:650 [inline] run_ksoftirqd+0x2d/0x50 kernel/softirq.c:642 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296