------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 0 PID: 6872 at net/core/filter.c:7522 bpf_warn_invalid_xdp_action net/core/filter.c:7522 [inline] WARNING: CPU: 0 PID: 6872 at net/core/filter.c:7522 bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7518 Modules linked in: CPU: 0 PID: 6872 Comm: syz-executor171 Not tainted 5.9.0-rc6-next-20200924-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:7522 [inline] RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:7518 Code: a0 22 68 89 41 83 fc 04 48 c7 c6 e0 22 68 89 48 0f 46 ee e8 e3 fc 10 fb 44 89 e2 48 c7 c7 20 23 68 89 48 89 ee e8 9c 89 b1 01 <0f> 0b 5b 5d 41 5c e9 c6 fc 10 fb 66 0f 1f 44 00 00 41 57 41 56 49 RSP: 0018:ffffc90000007a98 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88809c0ae100 RSI: ffffffff815e0005 RDI: fffff52000000f45 RBP: ffffffff896822a0 R08: 0000000000000001 R09: ffff8880ae4319a7 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90000007c88 FS: 00000000025de880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006cc090 CR3: 00000000a853d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netif_receive_generic_xdp+0xe65/0x1720 net/core/dev.c:4693 do_xdp_generic net/core/dev.c:4741 [inline] do_xdp_generic net/core/dev.c:4734 [inline] __netif_receive_skb_core+0x11ee/0x3710 net/core/dev.c:5113 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5285 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401 process_backlog+0x2e1/0x8e0 net/core/dev.c:6291 napi_poll net/core/dev.c:6735 [inline] net_rx_action+0x587/0x1320 net/core/dev.c:6805 __do_softirq+0x203/0xab6 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:786 __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+0x154/0x1b0 kernel/softirq.c:330 __local_bh_enable_ip+0x196/0x1f0 kernel/softirq.c:195 local_bh_enable include/linux/bottom_half.h:32 [inline] netlink_create+0x3f6/0x5d0 net/netlink/af_netlink.c:699 __sock_create+0x3de/0x780 net/socket.c:1427 sock_create net/socket.c:1478 [inline] __sys_socket+0xef/0x200 net/socket.c:1520 __do_sys_socket net/socket.c:1529 [inline] __se_sys_socket net/socket.c:1527 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1527 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x441849 Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff951592b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441849 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 000000000000fffb R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004025f0 R13: 0000000000402680 R14: 0000000000000000 R15: 0000000000000000