------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 1 PID: 7844 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action net/core/filter.c:5537 [inline] WARNING: CPU: 1 PID: 7844 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: 1 PID: 7844 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __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:ffff8880ba107a00 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff814dff01 RDI: ffffed1017420f32 RBP: ffffffff894d4ae0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffffea R13: 0000000000000001 R14: 000000000000150a R15: ffff8880ba107b00 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 RIP: 0010:__copy_skb_header+0x41e/0x500 net/core/skbuff.c:806 Code: 66 44 89 ab 8c 00 00 00 48 8d b5 90 00 00 00 ba 38 00 00 00 48 8d bb 90 00 00 00 e8 ac 63 28 fb 48 b8 00 00 00 00 00 fc ff df <49> c7 04 04 00 00 00 00 48 8b 44 24 60 65 48 2b 04 25 28 00 00 00 RSP: 0018:ffff88805f947768 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff04 RAX: dffffc0000000000 RBX: ffff8880a1370040 RCX: 0000000000000000 RDX: 0000000000000038 RSI: ffff8880a1370608 RDI: ffff8880a1370108 RBP: ffff8880a1370540 R08: 0000000000000001 R09: ffffed101426e020 R10: ffff8880a1370107 R11: 00000000bb7aaff8 R12: 1ffff1100bf28eee R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a13705ce __skb_clone+0x99/0x7c0 net/core/skbuff.c:865 skb_clone+0x1aa/0x3d0 net/core/skbuff.c:1300 ____bpf_clone_redirect net/core/filter.c:2079 [inline] bpf_clone_redirect+0xaf/0x430 net/core/filter.c:2066 ___bpf_prog_run+0x1bfa/0x4e80 kernel/bpf/core.c:1184 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 66 44 89 ab 8c 00 00 mov %r13w,0x8c(%rbx) 7: 00 8: 48 8d b5 90 00 00 00 lea 0x90(%rbp),%rsi f: ba 38 00 00 00 mov $0x38,%edx 14: 48 8d bb 90 00 00 00 lea 0x90(%rbx),%rdi 1b: e8 ac 63 28 fb callq 0xfb2863cc 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 49 c7 04 04 00 00 00 movq $0x0,(%r12,%rax,1) <-- trapping instruction 31: 00 32: 48 8b 44 24 60 mov 0x60(%rsp),%rax 37: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax 3e: 00 00