audit: type=1804 audit(1674662618.316:309): pid=8224 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2541184290/syzkaller.4lW8AB/1201/bus" dev="sda1" ino=14455 res=1 ------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 1 PID: 8288 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action net/core/filter.c:5537 [inline] WARNING: CPU: 1 PID: 8288 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: 8288 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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: 000000000000fc00 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:unwind_next_frame+0x743/0x1400 arch/x86/kernel/unwind_orc.c:437 Code: 2c ff ff ff be 02 00 00 00 4c 89 ff 4c 89 44 24 30 48 89 4c 24 28 e8 2c de 6e 00 4c 8b 44 24 30 48 8b 4c 24 28 e9 06 ff ff ff <48> b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 RSP: 0018:ffff88823859f3f8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff04 RAX: 0000000000000005 RBX: 1ffff110470b3e88 RCX: ffffffff8b99dea5 RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8b99dea4 R09: ffffffff8b99de70 R10: ffff88823859f587 R11: 0000000000074071 R12: ffff88823859f570 R13: ffff88823859f55d R14: ffff88823859f528 R15: ffffffff8b99dea0 __save_stack_trace+0xd6/0x190 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 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 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), 4 bytes skipped: 0: be 02 00 00 00 mov $0x2,%esi 5: 4c 89 ff mov %r15,%rdi 8: 4c 89 44 24 30 mov %r8,0x30(%rsp) d: 48 89 4c 24 28 mov %rcx,0x28(%rsp) 12: e8 2c de 6e 00 callq 0x6ede43 17: 4c 8b 44 24 30 mov 0x30(%rsp),%r8 1c: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx 21: e9 06 ff ff ff jmpq 0xffffff2c * 26: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 2d: fc ff df 30: 48 8b 14 24 mov (%rsp),%rdx 34: 48 c1 ea 03 shr $0x3,%rdx 38: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)