------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 0 PID: 1479 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action net/core/filter.c:5537 [inline] WARNING: CPU: 0 PID: 1479 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: 1479 Comm: syz-executor.4 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:ffff8880ba0079d0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff814dff01 RDI: ffffed1017400f2c RBP: ffffffff894d4ae0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffffea R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880ba007ad0 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 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:deref_stack_reg+0x28/0x1d0 arch/x86/kernel/unwind_orc.c:330 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 41 56 41 55 49 89 d5 41 54 49 89 fc 55 48 89 f5 53 48 83 ec 68 48 c7 44 24 08 b3 8a b5 41 <48> 8d 5c 24 08 48 c7 44 24 10 35 af b6 89 48 c1 eb 03 48 c7 44 24 RSP: 0018:ffff8880a30bf360 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11014617e88 RCX: ffffffff8bf58503 RDX: ffff8880a30bf568 RSI: ffff8880a30bf850 RDI: ffff8880a30bf528 RBP: ffff8880a30bf850 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880a30bf587 R11: 0000000000074071 R12: ffff8880a30bf528 R13: ffff8880a30bf568 R14: ffff8880a30bf528 R15: ffffffff8bf584fe unwind_next_frame+0xf83/0x1400 arch/x86/kernel/unwind_orc.c:555 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 skb_clone+0x151/0x3d0 net/core/skbuff.c:1293 ____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: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 41 56 push %r14 e: 41 55 push %r13 10: 49 89 d5 mov %rdx,%r13 13: 41 54 push %r12 15: 49 89 fc mov %rdi,%r12 18: 55 push %rbp 19: 48 89 f5 mov %rsi,%rbp 1c: 53 push %rbx 1d: 48 83 ec 68 sub $0x68,%rsp 21: 48 c7 44 24 08 b3 8a movq $0x41b58ab3,0x8(%rsp) 28: b5 41 * 2a: 48 8d 5c 24 08 lea 0x8(%rsp),%rbx <-- trapping instruction 2f: 48 c7 44 24 10 35 af movq $0xffffffff89b6af35,0x10(%rsp) 36: b6 89 38: 48 c1 eb 03 shr $0x3,%rbx 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: 44 rex.R 3f: 24 .byte 0x24