OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.118' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 27.022594] A link change request failed with some changes committed already. Interface eth0 may have been left with an inconsistent configuration, please check. [ 27.040577] Illegal XDP return value 4294967274, expect packet loss! [ 27.047236] ------------[ cut here ]------------ [ 27.051977] WARNING: CPU: 0 PID: 7957 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.061750] Kernel panic - not syncing: panic_on_warn set ... [ 27.061750] [ 27.069085] CPU: 0 PID: 7957 Comm: syz-executor847 Not tainted 4.14.260-syzkaller #0 [ 27.076935] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.086265] Call Trace: [ 27.088832] dump_stack+0x1b2/0x281 [ 27.092435] panic+0x1f9/0x42d [ 27.095605] ? add_taint.cold+0x16/0x16 [ 27.099556] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.105066] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.110576] __warn.cold+0x20/0x44 [ 27.114097] ? ist_end_non_atomic+0x10/0x10 [ 27.118397] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.123908] report_bug+0x208/0x250 [ 27.127511] do_error_trap+0x195/0x2d0 [ 27.131373] ? math_error+0x2d0/0x2d0 [ 27.135241] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.140064] invalid_op+0x1b/0x40 [ 27.143494] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.149614] RSP: 0018:ffff8880925bf648 EFLAGS: 00010286 [ 27.154950] RAX: 0000000000000038 RBX: 1ffff110124b7ed2 RCX: 0000000000000000 [ 27.162196] RDX: 0000000000000000 RSI: ffffffff878bbcc0 RDI: ffffed10124b7ebf [ 27.169449] RBP: ffffffff88564900 R08: 0000000000000038 R09: 0000000000000000 [ 27.176706] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea [ 27.183958] R13: ffffc90001ab6000 R14: 0000000000000000 R15: ffff88809c1fa146 [ 27.191223] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 27.196736] netif_receive_generic_xdp+0x554/0x950 [ 27.201639] ? flush_backlog+0x620/0x620 [ 27.205677] ? lock_acquire+0x170/0x3f0 [ 27.209625] ? check_preemption_disabled+0x35/0x240 [ 27.214627] do_xdp_generic.part.0+0x22/0xc0 [ 27.219020] netif_rx_internal+0x219/0x800 [ 27.223232] ? eth_type_trans+0x281/0x5b0 [ 27.227365] ? do_xdp_generic.part.0+0xc0/0xc0 [ 27.231923] ? __dev_forward_skb+0x3e7/0x610 [ 27.236305] dev_forward_skb+0x39/0x50 [ 27.240171] __bpf_redirect+0x163/0x9c0 [ 27.244121] bpf_clone_redirect+0x1e1/0x2c0 [ 27.248423] ? __bpf_redirect+0x9c0/0x9c0 [ 27.252546] ___bpf_prog_run+0x252b/0x5a70 [ 27.257110] ? bpf_jit_compile+0x30/0x30 [ 27.261263] ? is_bpf_text_address+0xb8/0x150 [ 27.265738] ? kernel_text_address+0xbd/0xf0 [ 27.270123] ? kernel_text_address+0xbd/0xf0 [ 27.274511] ? __bpf_prog_run512+0x86/0xb0 [ 27.278720] ? ___bpf_prog_run+0x5a70/0x5a70 [ 27.283111] ? __lock_acquire+0x5fc/0x3f20 [ 27.287331] ? __lock_acquire+0x5fc/0x3f20 [ 27.291545] ? cpumask_any_but+0xb3/0xe0 [ 27.295581] ? trace_hardirqs_on+0x10/0x10 [ 27.299792] ? trace_hardirqs_on+0x10/0x10 [ 27.304004] ? trace_hardirqs_on+0x10/0x10 [ 27.308216] ? __lock_acquire+0x5fc/0x3f20 [ 27.312545] ? bpf_test_run+0x4c/0x330 [ 27.316413] ? lock_downgrade+0x740/0x740 [ 27.320539] ? lock_acquire+0x170/0x3f0 [ 27.324499] ? check_preemption_disabled+0x35/0x240 [ 27.329496] ? bpf_test_run+0xa5/0x330 [ 27.333362] ? bpf_prog_test_run_skb+0x62b/0x910 [ 27.338094] ? bpf_test_finish.isra.0+0x140/0x140 [ 27.342917] ? bpf_prog_add+0x43/0xa0 [ 27.346695] ? SyS_bpf+0x547/0x35e0 [ 27.350296] ? bpf_test_finish.isra.0+0x140/0x140 [ 27.355115] ? bpf_prog_get+0x20/0x20 [ 27.358906] ? __do_page_fault+0x571/0xad0 [ 27.363119] ? lock_downgrade+0x740/0x740 [ 27.367248] ? do_syscall_64+0x4c/0x640 [ 27.371193] ? bpf_prog_get+0x20/0x20 [ 27.374965] ? do_syscall_64+0x1d5/0x640 [ 27.379002] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.384497] Kernel Offset: disabled [ 27.388145] Rebooting in 86400 seconds..