[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 64.355185][ T7055] syz-executor348 uses obsolete (PF_INET,SOCK_PACKET) [ 64.371332][ T7055] ------------[ cut here ]------------ [ 64.376976][ T7055] WARNING: CPU: 0 PID: 7055 at net/ipv4/route.c:1243 ip_rt_bug+0x11/0x20 [ 64.385411][ T7055] Kernel panic - not syncing: panic_on_warn set ... [ 64.392027][ T7055] CPU: 0 PID: 7055 Comm: syz-executor348 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 64.401915][ T7055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.412098][ T7055] Call Trace: [ 64.415507][ T7055] dump_stack+0x188/0x20d [ 64.419849][ T7055] ? rt_dst_alloc+0x3d0/0x430 [ 64.424533][ T7055] panic+0x2e3/0x75c [ 64.428444][ T7055] ? add_taint.cold+0x16/0x16 [ 64.433131][ T7055] ? printk+0xba/0xed [ 64.437119][ T7055] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 64.442586][ T7055] ? __warn.cold+0x14/0x35 [ 64.447007][ T7055] ? __warn+0xd5/0x1c8 [ 64.451090][ T7055] ? ip_rt_bug+0x11/0x20 [ 64.455341][ T7055] __warn.cold+0x2f/0x35 [ 64.459597][ T7055] ? ip_rt_bug+0x11/0x20 [ 64.463844][ T7055] report_bug+0x27b/0x2f0 [ 64.468188][ T7055] do_error_trap+0x12b/0x220 [ 64.472827][ T7055] ? ip_rt_bug+0x11/0x20 [ 64.477080][ T7055] do_invalid_op+0x32/0x40 [ 64.481495][ T7055] ? ip_rt_bug+0x11/0x20 [ 64.485769][ T7055] invalid_op+0x23/0x30 [ 64.489930][ T7055] RIP: 0010:ip_rt_bug+0x11/0x20 [ 64.494785][ T7055] Code: ff ff e8 92 17 1b fb e9 ef fe ff ff e8 88 17 1b fb e9 59 ff ff ff 0f 1f 00 55 48 89 d5 e8 27 f6 dc fa 48 89 ef e8 7f ef 8a ff <0f> 0b 31 c0 5d c3 66 0f 1f 84 00 00 00 00 00 41 54 49 89 fc e8 06 [ 64.514454][ T7055] RSP: 0018:ffffc90003457300 EFLAGS: 00010293 [ 64.520513][ T7055] RAX: ffff8880914e4400 RBX: 0000000000000000 RCX: 0000000000000000 [ 64.528476][ T7055] RDX: 0000000000000000 RSI: ffffffff86963e71 RDI: 0000000000000286 [ 64.536423][ T7055] RBP: ffff888093f8f300 R08: 0000000000000000 R09: ffffed1015cc710c [ 64.544386][ T7055] R10: ffff8880ae63885b R11: ffffed1015cc710b R12: ffff8880a6d2a900 [ 64.552346][ T7055] R13: ffff888093f8f300 R14: ffff8882195de680 R15: ffff888093f8f358 [ 64.560322][ T7055] ? ip_rt_bug+0x11/0x20 [ 64.569583][ T7055] ip_local_out+0xaf/0x1a0 [ 64.573980][ T7055] ip_send_skb+0x3e/0xe0 [ 64.578204][ T7055] ip_push_pending_frames+0x5f/0x80 [ 64.583378][ T7055] icmp_push_reply+0x33f/0x490 [ 64.588124][ T7055] __icmp_send+0xc4d/0x14b0 [ 64.592619][ T7055] ? icmp_route_lookup.constprop.0+0x1470/0x1470 [ 64.599016][ T7055] ? ipt_do_table+0xd23/0x1880 [ 64.603761][ T7055] ? find_held_lock+0x2d/0x110 [ 64.608686][ T7055] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.614909][ T7055] ? __ip_options_compile+0x88a/0x1710 [ 64.620379][ T7055] ? ip_forward+0x1d50/0x1d50 [ 64.625040][ T7055] ? ip_route_input_noref+0x15c/0x240 [ 64.630393][ T7055] ? ip_options_compile+0xad/0xf0 [ 64.635393][ T7055] ip_options_compile+0xad/0xf0 [ 64.640239][ T7055] ? __ip_options_compile+0x1710/0x1710 [ 64.649149][ T7055] ? rcu_read_lock_held_common+0x130/0x130 [ 64.654930][ T7055] ? ip_rcv+0x24e/0x3c0 [ 64.659077][ T7055] ip_rcv_finish_core.isra.0+0x4b3/0x1ec0 [ 64.664773][ T7055] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.670654][ T7055] ip_rcv_finish+0x144/0x2f0 [ 64.675236][ T7055] ip_rcv+0xd0/0x3c0 [ 64.679106][ T7055] ? ip_local_deliver+0x4e0/0x4e0 [ 64.684106][ T7055] ? find_held_lock+0x2d/0x110 [ 64.688848][ T7055] ? ip_rcv_finish_core.isra.0+0x1ec0/0x1ec0 [ 64.694804][ T7055] ? lock_acquire+0x1f2/0x8f0 [ 64.699457][ T7055] ? netif_receive_skb+0xec/0x960 [ 64.704458][ T7055] ? ip_local_deliver+0x4e0/0x4e0 [ 64.709466][ T7055] __netif_receive_skb_one_core+0xf5/0x160 [ 64.715264][ T7055] ? __netif_receive_skb_core+0x3340/0x3340 [ 64.721139][ T7055] ? lockdep_hardirqs_on+0x196/0x620 [ 64.726417][ T7055] __netif_receive_skb+0x27/0x1c0 [ 64.731420][ T7055] netif_receive_skb+0x16e/0x960 [ 64.736365][ T7055] ? __netif_receive_skb+0x1c0/0x1c0 [ 64.741731][ T7055] tun_rx_batched.isra.0+0x47b/0x7d0 [ 64.747001][ T7055] ? tun_get_user+0x122b/0x3c70 [ 64.751827][ T7055] ? tun_cleanup+0x30/0x30 [ 64.756235][ T7055] ? lock_release+0x800/0x800 [ 64.760897][ T7055] ? lock_downgrade+0x840/0x840 [ 64.765724][ T7055] ? __local_bh_enable_ip+0x159/0x270 [ 64.771082][ T7055] tun_get_user+0x13c6/0x3c70 [ 64.775757][ T7055] ? tun_build_skb.isra.0+0x13e0/0x13e0 [ 64.781288][ T7055] ? rcu_read_lock_held_common+0x130/0x130 [ 64.787075][ T7055] tun_chr_write_iter+0xba/0x151 [ 64.791987][ T7055] new_sync_write+0x4a2/0x700 [ 64.796656][ T7055] ? new_sync_read+0x7a0/0x7a0 [ 64.801411][ T7055] ? apparmor_path_rmdir+0x30/0x30 [ 64.806522][ T7055] ? security_file_permission+0x8c/0x470 [ 64.812133][ T7055] __vfs_write+0xc9/0x100 [ 64.816450][ T7055] vfs_write+0x268/0x5d0 [ 64.820671][ T7055] ksys_write+0x12d/0x250 [ 64.824986][ T7055] ? __ia32_sys_read+0xb0/0xb0 [ 64.829727][ T7055] ? trace_hardirqs_off_caller+0x55/0x230 [ 64.835435][ T7055] do_syscall_64+0xf6/0x7d0 [ 64.839932][ T7055] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 64.845800][ T7055] RIP: 0033:0x4406e9 [ 64.849671][ T7055] 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 [ 64.869260][ T7055] RSP: 002b:00007ffe39a670a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 64.877656][ T7055] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004406e9 [ 64.885609][ T7055] RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 [ 64.893568][ T7055] RBP: 0000000000000000 R08: 0000000000002c00 R09: 00007ffe0000000d [ 64.901527][ T7055] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f70 [ 64.909486][ T7055] R13: 0000000000402000 R14: 0000000000000000 R15: 0000000000000000 [ 64.919028][ T7055] Kernel Offset: disabled [ 64.923416][ T7055] Rebooting in 86400 seconds..