Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.75' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 33.227225] A link change request failed with some changes committed already. Interface eth0 may have been left with an inconsistent configuration, please check. [ 33.247014] ------------[ cut here ]------------ [ 33.252058] Illegal XDP return value 4294967274, expect packet loss! [ 33.258855] WARNING: CPU: 1 PID: 8099 at net/core/filter.c:5537 bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.268199] Kernel panic - not syncing: panic_on_warn set ... [ 33.268199] [ 33.275546] CPU: 1 PID: 8099 Comm: syz-executor117 Not tainted 4.19.208-syzkaller #0 [ 33.283411] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.292750] Call Trace: [ 33.295437] [ 33.297576] dump_stack+0x1fc/0x2ef [ 33.301240] panic+0x26a/0x50e [ 33.304415] ? __warn_printk+0xf3/0xf3 [ 33.308284] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.313367] ? __probe_kernel_read+0x130/0x1b0 [ 33.318018] ? __warn.cold+0x5/0x5a [ 33.321624] ? __warn+0xe4/0x200 [ 33.324988] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.330124] __warn.cold+0x20/0x5a [ 33.333663] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.338760] report_bug+0x262/0x2b0 [ 33.342379] do_error_trap+0x1d7/0x310 [ 33.346309] ? math_error+0x310/0x310 [ 33.350097] ? irq_work_claim+0xa6/0xc0 [ 33.354053] ? irq_work_queue+0x29/0x80 [ 33.358097] ? error_entry+0x72/0xd0 [ 33.361797] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.366795] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.371621] invalid_op+0x14/0x20 [ 33.375058] RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.380754] Code: 20 4a 4d 89 41 83 fc 04 48 c7 c6 60 4a 4d 89 48 0f 46 ee e8 03 6d e3 fa 44 89 e2 48 c7 c7 a0 4a 4d 89 48 89 ee e8 96 89 73 01 <0f> 0b 5b 5d 41 5c e9 e6 6c e3 fa 66 0f 1f 44 00 00 41 54 55 89 fd [ 33.399729] RSP: 0018:ffff8880ba107a18 EFLAGS: 00010282 [ 33.405072] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 33.412321] RDX: 0000000000000100 RSI: ffffffff814dfe11 RDI: ffffed1017420f35 [ 33.419567] RBP: ffffffff894d4a20 R08: 0000000000000001 R09: 0000000000000000 [ 33.426816] R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffffea [ 33.434064] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880ba107b18 [ 33.441335] ? vprintk_func+0x81/0x180 [ 33.445211] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 33.450295] netif_receive_generic_xdp+0xcab/0x1540 [ 33.455297] do_xdp_generic.part.0+0x80/0x1a0 [ 33.459772] ? generic_xdp_tx+0x710/0x710 [ 33.463907] ? check_preemption_disabled+0x41/0x280 [ 33.468904] __netif_receive_skb_core+0xd00/0x3270 [ 33.473815] ? do_xdp_generic.part.0+0x1a0/0x1a0 [ 33.478553] ? mark_held_locks+0xf0/0xf0 [ 33.482594] ? napi_complete_done+0x16c/0x570 [ 33.487079] ? virtqueue_poll+0x100/0x150 [ 33.491216] ? virtnet_poll+0x764/0xe00 [ 33.495227] __netif_receive_skb_one_core+0xae/0x180 [ 33.500313] ? __netif_receive_skb_core+0x3270/0x3270 [ 33.505488] ? lock_acquire+0x170/0x3c0 [ 33.509443] ? process_backlog+0x1d0/0x700 [ 33.513660] __netif_receive_skb+0x27/0x1c0 [ 33.517962] process_backlog+0x241/0x700 [ 33.522006] ? net_rx_action+0x260/0xfb0 [ 33.526095] net_rx_action+0x4ac/0xfb0 [ 33.529968] ? napi_complete_done+0x570/0x570 [ 33.534447] ? check_preemption_disabled+0x41/0x280 [ 33.539450] __do_softirq+0x265/0x980 [ 33.543252] do_softirq_own_stack+0x2a/0x40 [ 33.547548] [ 33.549768] do_softirq.part.0+0x160/0x1c0 [ 33.553989] ? netlink_create+0x3c2/0x5e0 [ 33.558136] __local_bh_enable_ip+0x20e/0x270 [ 33.562613] netlink_create+0x402/0x5e0 [ 33.566570] ? rtnl_link_get_net_capable.constprop.0+0x230/0x230 [ 33.572695] __sock_create+0x3d8/0x740 [ 33.576568] __sys_socket+0xef/0x200 [ 33.580271] ? move_addr_to_kernel+0x70/0x70 [ 33.584748] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.590093] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.595091] __x64_sys_socket+0x6f/0xb0 [ 33.599047] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.603607] do_syscall_64+0xf9/0x620 [ 33.607388] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.612559] RIP: 0033:0x7fc83194f209 [ 33.616257] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48 [ 33.635139] RSP: 002b:00007fff7553dbc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 [ 33.642831] RAX: ffffffffffffffda RBX: 00000000000081b9 RCX: 00007fc83194f209 [ 33.650083] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 [ 33.657335] RBP: 0000000000000000 R08: 00007fff7553dd68 R09: 00007fff7553dd68 [ 33.664586] R10: 00007fff7553dd68 R11: 0000000000000246 R12: 00007fff7553dbdc [ 33.671837] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 33.679476] Kernel Offset: disabled [ 33.683135] Rebooting in 86400 seconds..