[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.167253][ T7064] syz-executor642 uses obsolete (PF_INET,SOCK_PACKET) [ 59.182283][ T7064] ------------[ cut here ]------------ [ 59.187962][ T7064] WARNING: CPU: 0 PID: 7064 at net/ipv4/route.c:1243 ip_rt_bug+0x11/0x20 [ 59.196378][ T7064] Kernel panic - not syncing: panic_on_warn set ... [ 59.202979][ T7064] CPU: 0 PID: 7064 Comm: syz-executor642 Not tainted 5.7.0-rc2-syzkaller #0 [ 59.211656][ T7064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.221717][ T7064] Call Trace: [ 59.225024][ T7064] dump_stack+0x188/0x20d [ 59.229369][ T7064] ? rt_dst_alloc+0x3b0/0x430 [ 59.234062][ T7064] panic+0x2e3/0x75c [ 59.237973][ T7064] ? add_taint.cold+0x16/0x16 [ 59.242669][ T7064] ? printk+0xba/0xed [ 59.246662][ T7064] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 59.252139][ T7064] ? __warn.cold+0x14/0x35 [ 59.256573][ T7064] ? __warn+0xd5/0x1c8 [ 59.260665][ T7064] ? ip_rt_bug+0x11/0x20 [ 59.264930][ T7064] __warn.cold+0x2f/0x35 [ 59.269200][ T7064] ? ip_rt_bug+0x11/0x20 [ 59.273461][ T7064] report_bug+0x27b/0x2f0 [ 59.278283][ T7064] do_error_trap+0x12b/0x220 [ 59.282885][ T7064] ? ip_rt_bug+0x11/0x20 [ 59.287141][ T7064] do_invalid_op+0x32/0x40 [ 59.291697][ T7064] ? ip_rt_bug+0x11/0x20 [ 59.296919][ T7064] invalid_op+0x23/0x30 [ 59.301093][ T7064] RIP: 0010:ip_rt_bug+0x11/0x20 [ 59.306043][ T7064] Code: ff ff e8 c2 fd 20 fb e9 ef fe ff ff e8 b8 fd 20 fb e9 59 ff ff ff 0f 1f 00 55 48 89 d5 e8 27 36 e3 fa 48 89 ef e8 ff 04 8b ff <0f> 0b 31 c0 5d c3 66 0f 1f 84 00 00 00 00 00 41 54 49 89 fc e8 06 [ 59.325659][ T7064] RSP: 0018:ffffc900047cf300 EFLAGS: 00010293 [ 59.331703][ T7064] RAX: ffff8880a8b904c0 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.339670][ T7064] RDX: 0000000000000000 RSI: ffffffff868ff891 RDI: 0000000000000282 [ 59.347624][ T7064] RBP: ffff888092f3fcc0 R08: 0000000000000000 R09: ffffed1015cc7104 [ 59.355574][ T7064] R10: ffff8880ae63881b R11: ffffed1015cc7103 R12: ffff888096384600 [ 59.363633][ T7064] R13: ffff888092f3fcc0 R14: ffff8882195a6680 R15: ffff888092f3fd18 [ 59.371599][ T7064] ? ip_rt_bug+0x11/0x20 [ 59.375844][ T7064] ip_local_out+0xaf/0x1a0 [ 59.380239][ T7064] ip_send_skb+0x3e/0xe0 [ 59.384465][ T7064] ip_push_pending_frames+0x5f/0x80 [ 59.389645][ T7064] icmp_push_reply+0x33f/0x490 [ 59.394433][ T7064] __icmp_send+0xc4d/0x14b0 [ 59.399037][ T7064] ? icmp_route_lookup.constprop.0+0x1480/0x1480 [ 59.405346][ T7064] ? ipt_do_table+0xd23/0x1880 [ 59.410098][ T7064] ? find_held_lock+0x2d/0x110 [ 59.414860][ T7064] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 59.420768][ T7064] ? __ip_options_compile+0x88a/0x1710 [ 59.426218][ T7064] ? ip_forward+0x1d50/0x1d50 [ 59.430881][ T7064] ? ip_route_input_noref+0x15c/0x240 [ 59.436240][ T7064] ? ip_options_compile+0xad/0xf0 [ 59.441277][ T7064] ip_options_compile+0xad/0xf0 [ 59.446124][ T7064] ? __ip_options_compile+0x1710/0x1710 [ 59.451754][ T7064] ? rcu_read_lock_held_common+0x130/0x130 [ 59.457536][ T7064] ? ip_rcv+0x24e/0x3c0 [ 59.461672][ T7064] ip_rcv_finish_core.isra.0+0x4b3/0x1ec0 [ 59.467393][ T7064] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 59.473280][ T7064] ip_rcv_finish+0x144/0x2f0 [ 59.477893][ T7064] ip_rcv+0xd0/0x3c0 [ 59.481781][ T7064] ? ip_local_deliver+0x4e0/0x4e0 [ 59.486816][ T7064] ? find_held_lock+0x2d/0x110 [ 59.491599][ T7064] ? ip_rcv_finish_core.isra.0+0x1ec0/0x1ec0 [ 59.497588][ T7064] ? lock_acquire+0x1f2/0x8f0 [ 59.502247][ T7064] ? netif_receive_skb+0xec/0x960 [ 59.507527][ T7064] ? ip_local_deliver+0x4e0/0x4e0 [ 59.512548][ T7064] __netif_receive_skb_one_core+0xf5/0x160 [ 59.518343][ T7064] ? __netif_receive_skb_core+0x30e0/0x30e0 [ 59.525110][ T7064] ? lockdep_hardirqs_on+0x196/0x620 [ 59.530503][ T7064] __netif_receive_skb+0x27/0x1c0 [ 59.535520][ T7064] netif_receive_skb+0x16e/0x960 [ 59.540442][ T7064] ? __netif_receive_skb+0x1c0/0x1c0 [ 59.545730][ T7064] tun_rx_batched.isra.0+0x47b/0x7d0 [ 59.551004][ T7064] ? tun_get_user+0x122b/0x3c70 [ 59.555843][ T7064] ? tun_cleanup+0x30/0x30 [ 59.560253][ T7064] ? lock_release+0x800/0x800 [ 59.564995][ T7064] ? lock_downgrade+0x840/0x840 [ 59.570867][ T7064] ? __local_bh_enable_ip+0x159/0x270 [ 59.576237][ T7064] tun_get_user+0x13c6/0x3c70 [ 59.580922][ T7064] ? tun_build_skb.isra.0+0x13e0/0x13e0 [ 59.587170][ T7064] ? rcu_read_lock_held_common+0x130/0x130 [ 59.592974][ T7064] tun_chr_write_iter+0xba/0x151 [ 59.597980][ T7064] new_sync_write+0x4a2/0x700 [ 59.602637][ T7064] ? new_sync_read+0x7a0/0x7a0 [ 59.607473][ T7064] ? apparmor_path_rmdir+0x30/0x30 [ 59.612657][ T7064] ? security_file_permission+0x8c/0x470 [ 59.618269][ T7064] __vfs_write+0xc9/0x100 [ 59.622580][ T7064] vfs_write+0x268/0x5d0 [ 59.626812][ T7064] ksys_write+0x12d/0x250 [ 59.631207][ T7064] ? __ia32_sys_read+0xb0/0xb0 [ 59.635953][ T7064] ? trace_hardirqs_off_caller+0x55/0x230 [ 59.641723][ T7064] do_syscall_64+0xf6/0x7d0 [ 59.646223][ T7064] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.652105][ T7064] RIP: 0033:0x4406e9 [ 59.655985][ T7064] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.676503][ T7064] RSP: 002b:00007fff21db9968 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 59.685848][ T7064] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004406e9 [ 59.693892][ T7064] RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 [ 59.701848][ T7064] RBP: 0000000000000000 R08: 0000000000002c00 R09: 00007fff0000000d [ 59.709801][ T7064] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f70 [ 59.717748][ T7064] R13: 0000000000402000 R14: 0000000000000000 R15: 0000000000000000 [ 59.727281][ T7064] Kernel Offset: disabled [ 59.731710][ T7064] Rebooting in 86400 seconds..