[ 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 '10.128.10.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.068229][ T7033] syz-executor857 uses obsolete (PF_INET,SOCK_PACKET) [ 54.081633][ T7033] ------------[ cut here ]------------ [ 54.087248][ T7033] WARNING: CPU: 1 PID: 7033 at net/ipv4/route.c:1243 ip_rt_bug+0x11/0x20 [ 54.095657][ T7033] Kernel panic - not syncing: panic_on_warn set ... [ 54.102245][ T7033] CPU: 1 PID: 7033 Comm: syz-executor857 Not tainted 5.6.0-rc7-syzkaller #0 [ 54.110913][ T7033] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.120960][ T7033] Call Trace: [ 54.124255][ T7033] dump_stack+0x188/0x20d [ 54.128592][ T7033] ? rt_dst_alloc+0x440/0x440 [ 54.133269][ T7033] panic+0x2e3/0x75c [ 54.137167][ T7033] ? add_taint.cold+0x16/0x16 [ 54.141849][ T7033] ? printk+0xba/0xed [ 54.145833][ T7033] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 54.151299][ T7033] ? __warn.cold+0x14/0x35 [ 54.155720][ T7033] ? __warn+0xd5/0x1c8 [ 54.159895][ T7033] ? ip_rt_bug+0x11/0x20 [ 54.164142][ T7033] __warn.cold+0x2f/0x35 [ 54.168389][ T7033] ? ip_rt_bug+0x11/0x20 [ 54.172647][ T7033] report_bug+0x27b/0x2f0 [ 54.176988][ T7033] do_error_trap+0x12b/0x220 [ 54.181574][ T7033] ? ip_rt_bug+0x11/0x20 [ 54.185823][ T7033] do_invalid_op+0x32/0x40 [ 54.190235][ T7033] ? ip_rt_bug+0x11/0x20 [ 54.194482][ T7033] invalid_op+0x23/0x30 [ 54.198650][ T7033] RIP: 0010:ip_rt_bug+0x11/0x20 [ 54.203497][ T7033] Code: ff ff e8 c2 d7 33 fb e9 eb fe ff ff e8 b8 d7 33 fb e9 59 ff ff ff 0f 1f 00 55 48 89 d5 e8 17 0e f7 fa 48 89 ef e8 6f 0c 8f ff <0f> 0b 31 c0 5d c3 66 0f 1f 84 00 00 00 00 00 41 54 49 89 fc e8 f6 [ 54.223085][ T7033] RSP: 0018:ffffc90001937300 EFLAGS: 00010293 [ 54.229235][ T7033] RAX: ffff8880a2bc2540 RBX: 0000000000000000 RCX: 0000000000000000 [ 54.237182][ T7033] RDX: 0000000000000000 RSI: ffffffff867b1711 RDI: 0000000000000286 [ 54.245130][ T7033] RBP: ffff8880a31fb940 R08: 0000000000000000 R09: ffffed1015ce7074 [ 54.253089][ T7033] R10: ffffed1015ce7073 R11: ffff8880ae73839b R12: ffff8880970b0e00 [ 54.261992][ T7033] R13: ffff8880a31fb940 R14: ffff8880a4a71240 R15: ffff8880a31fb998 [ 54.269954][ T7033] ? ip_rt_bug+0x11/0x20 [ 54.274179][ T7033] ip_local_out+0xaf/0x1a0 [ 54.278586][ T7033] ip_send_skb+0x3e/0xe0 [ 54.282821][ T7033] ip_push_pending_frames+0x5f/0x80 [ 54.288012][ T7033] icmp_push_reply+0x33f/0x490 [ 54.292776][ T7033] __icmp_send+0xc44/0x14a0 [ 54.297270][ T7033] ? icmp_route_lookup.constprop.0+0x1480/0x1480 [ 54.303573][ T7033] ? __lock_acquire+0x80b/0x3ca0 [ 54.308499][ T7033] ? find_held_lock+0x2d/0x110 [ 54.313243][ T7033] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 54.319116][ T7033] ? __ip_options_compile+0x88a/0x1710 [ 54.324567][ T7033] ? ip_forward+0x1d50/0x1d50 [ 54.329223][ T7033] ? ip_route_input_noref+0x15c/0x240 [ 54.334574][ T7033] ? ip_options_compile+0xad/0xf0 [ 54.339571][ T7033] ip_options_compile+0xad/0xf0 [ 54.344402][ T7033] ? __ip_options_compile+0x1710/0x1710 [ 54.349929][ T7033] ? rcu_read_lock_held_common+0x130/0x130 [ 54.355736][ T7033] ? ip_rcv+0x24e/0x3c0 [ 54.359885][ T7033] ip_rcv_finish_core.isra.0+0x4aa/0x1ec0 [ 54.365589][ T7033] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 54.371472][ T7033] ip_rcv_finish+0x144/0x2f0 [ 54.376052][ T7033] ip_rcv+0xd0/0x3c0 [ 54.379923][ T7033] ? ip_local_deliver+0x4e0/0x4e0 [ 54.384928][ T7033] ? ip_rcv_finish_core.isra.0+0x1ec0/0x1ec0 [ 54.390892][ T7033] ? ip_local_deliver+0x4e0/0x4e0 [ 54.395894][ T7033] __netif_receive_skb_one_core+0xf5/0x160 [ 54.401726][ T7033] ? __netif_receive_skb_core+0x30b0/0x30b0 [ 54.407646][ T7033] ? lock_acquire+0x197/0x420 [ 54.412299][ T7033] ? netif_receive_skb+0xec/0x960 [ 54.417303][ T7033] __netif_receive_skb+0x27/0x1c0 [ 54.422342][ T7033] netif_receive_skb+0x16e/0x960 [ 54.427286][ T7033] ? __netif_receive_skb+0x1c0/0x1c0 [ 54.432596][ T7033] ? __lock_acquire+0x80b/0x3ca0 [ 54.438215][ T7033] tun_rx_batched.isra.0+0x47b/0x7d0 [ 54.443486][ T7033] ? mark_held_locks+0xe0/0xe0 [ 54.448225][ T7033] ? tun_flow_cleanup+0x280/0x280 [ 54.453233][ T7033] ? lock_acquire+0x197/0x420 [ 54.457886][ T7033] ? tun_get_user+0x11af/0x3be0 [ 54.462732][ T7033] tun_get_user+0x134a/0x3be0 [ 54.467407][ T7033] ? rcu_read_lock_held_common+0x130/0x130 [ 54.473194][ T7033] ? tun_build_skb.isra.0+0x13c0/0x13c0 [ 54.478730][ T7033] ? rcu_read_lock_held_common+0x130/0x130 [ 54.484522][ T7033] tun_chr_write_iter+0xb0/0x147 [ 54.489438][ T7033] new_sync_write+0x49c/0x700 [ 54.494093][ T7033] ? new_sync_read+0x790/0x790 [ 54.498840][ T7033] ? apparmor_path_rmdir+0x30/0x30 [ 54.503939][ T7033] ? security_file_permission+0x8a/0x370 [ 54.509552][ T7033] __vfs_write+0xc9/0x100 [ 54.513864][ T7033] vfs_write+0x262/0x5c0 [ 54.518088][ T7033] ksys_write+0x127/0x250 [ 54.522403][ T7033] ? __ia32_sys_read+0xb0/0xb0 [ 54.527154][ T7033] ? trace_hardirqs_off_caller+0x55/0x230 [ 54.532861][ T7033] do_syscall_64+0xf6/0x7d0 [ 54.537347][ T7033] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.543214][ T7033] RIP: 0033:0x440699 [ 54.547085][ T7033] 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 [ 54.566662][ T7033] RSP: 002b:00007fffce0515b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 54.575097][ T7033] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440699 [ 54.583071][ T7033] RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 [ 54.591032][ T7033] RBP: 0000000000000000 R08: 0000000000002c00 R09: 00007fff0000000d [ 54.598987][ T7033] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f20 [ 54.606942][ T7033] R13: 0000000000401fb0 R14: 0000000000000000 R15: 0000000000000000 [ 54.616293][ T7033] Kernel Offset: disabled [ 54.620672][ T7033] Rebooting in 86400 seconds..