IPVS: ftp: loaded support on port[0] = 21
------------[ cut here ]------------
Illegal XDP return value 4294967274, expect packet loss!
WARNING: CPU: 0 PID: 26858 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action net/core/filter.c:5537 [inline]
WARNING: CPU: 0 PID: 26858 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:5533
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 26858 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:5537 [inline]
RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 net/core/filter.c:5533
Code: e0 4a 4d 89 41 83 fc 04 48 c7 c6 20 4b 4d 89 48 0f 46 ee e8 53 5c e3 fa 44 89 e2 48 c7 c7 60 4b 4d 89 48 89 ee e8 26 94 73 01 <0f> 0b 5b 5d 41 5c e9 36 5c e3 fa 66 0f 1f 44 00 00 41 54 55 89 fd
RSP: 0018:ffff8880ba007a00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff814dff01 RDI: ffffed1017400f32
RBP: ffffffff894d4ae0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffffea
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880ba007b00
 netif_receive_generic_xdp+0xcab/0x1540 net/core/dev.c:4390
 do_xdp_generic.part.0+0x80/0x1a0 net/core/dev.c:4439
 do_xdp_generic net/core/dev.c:4808 [inline]
 __netif_receive_skb_core+0xd00/0x3270 net/core/dev.c:4808
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:4952
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066
 process_backlog+0x241/0x700 net/core/dev.c:5849
 napi_poll net/core/dev.c:6280 [inline]
 net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346
 __do_softirq+0x265/0x980 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:916
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x20 kernel/kcov.c:188
Code: 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 ec fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 89 f2 89 fe <bf> 05 00 00 00 e9 ce fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f
RSP: 0018:ffff888056b07c58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff04
RAX: 0000000080000001 RBX: 0000000000000000 RCX: ffffffff86a1c5f6
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000080000000
R13: 0000000000000600 R14: dffffc0000000000 R15: ffffc9000cf0f038
 bpf_test_run_one net/bpf/test_run.c:24 [inline]
 bpf_test_run+0x186/0x440 net/bpf/test_run.c:43
 bpf_prog_test_run_skb+0x579/0x9c0 net/bpf/test_run.c:147
 bpf_prog_test_run kernel/bpf/syscall.c:1796 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2441 [inline]
 __se_sys_bpf+0xc9e/0x3a20 kernel/bpf/syscall.c:2384
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f8d3b7a60c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d39cd6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8d3b8c6120 RCX: 00007f8d3b7a60c9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f8d3b801ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8509a73f R14: 00007f8d39cd6300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 8b 0c 24          	mov    (%rsp),%rcx
   6:	0f b7 d6             	movzwl %si,%edx
   9:	0f b7 f7             	movzwl %di,%esi
   c:	bf 03 00 00 00       	mov    $0x3,%edi
  11:	e9 ec fe ff ff       	jmpq   0xffffff02
  16:	66 66 2e 0f 1f 84 00 	data16 nopw %cs:0x0(%rax,%rax,1)
  1d:	00 00 00 00
  21:	90                   	nop
  22:	48 8b 0c 24          	mov    (%rsp),%rcx
  26:	89 f2                	mov    %esi,%edx
  28:	89 fe                	mov    %edi,%esi
* 2a:	bf 05 00 00 00       	mov    $0x5,%edi <-- trapping instruction
  2f:	e9 ce fe ff ff       	jmpq   0xffffff02
  34:	66 66 2e 0f 1f 84 00 	data16 nopw %cs:0x0(%rax,%rax,1)
  3b:	00 00 00 00
  3f:	0f                   	.byte 0xf