INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   31.457764] Not allocated shadow for addr ffff8801dcb38000 (page ffffea000b2c3500)
[   31.465500] Attempted to access 774 bytes
[   31.469645] ------------[ cut here ]------------
[   31.474374] kernel BUG at mm/kmsan/kmsan.c:1326!
[   31.479124] invalid opcode: 0000 [#1] SMP PTI
[   31.483603] Dumping ftrace buffer:
[   31.487118]    (ftrace buffer empty)
[   31.490810] Modules linked in:
[   31.494010] CPU: 0 PID: 3557 Comm: sshd Not tainted 4.16.0+ #83
[   31.500041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.509393] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   31.514990] RSP: 0018:ffff8801b02ee638 EFLAGS: 00010086
[   31.520334] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   31.527580] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   31.534826] RBP: ffff8801b02ee650 R08: 0000000000000000 R09: 0000000000000001
[   31.542071] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dcb38000
[   31.549316] R13: 0000000000000306 R14: 0000000000000001 R15: 0000000000000306
[   31.556565] FS:  00007fd84f1cd7c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   31.564770] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.570627] CR2: 00007fd84e980fb0 CR3: 00000001b5bc6000 CR4: 00000000001406f0
[   31.577878] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.585124] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.592379] Call Trace:
[   31.594957]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   31.600127]  kmsan_unpoison_shadow+0x66/0xb0
[   31.604517]  virtqueue_get_buf_ctx+0x742/0xa20
[   31.609082]  virtqueue_get_buf+0x72/0x90
[   31.613120]  start_xmit+0x276/0x2840
[   31.616814]  ? virtnet_close+0x2c0/0x2c0
[   31.620853]  dev_hard_start_xmit+0x5f1/0xc70
[   31.625248]  sch_direct_xmit+0x540/0x8f0
[   31.629291]  __qdisc_run+0x1785/0x3730
[   31.633163]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   31.638507]  __dev_queue_xmit+0x174a/0x2b60
[   31.642812]  dev_queue_xmit+0x4b/0x60
[   31.646590]  ip_finish_output2+0x1198/0x1380
[   31.650977]  ip_finish_output+0xcb0/0xff0
[   31.655125]  ip_output+0x502/0x5c0
[   31.658660]  ? ip_mc_finish_output+0x3b0/0x3b0
[   31.663218]  ? ip_finish_output+0xff0/0xff0
[   31.667516]  ip_queue_xmit+0x1fae/0x21c0
[   31.671556]  ? __ip_local_out+0x5b0/0x5b0
[   31.675684]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   31.681119]  ? __skb_clone+0x6de/0x980
[   31.684988]  ? ip_output+0x5c0/0x5c0
[   31.688678]  tcp_transmit_skb+0x38be/0x51f0
[   31.692982]  tcp_write_xmit+0x4311/0xb920
[   31.697123]  __tcp_push_pending_frames+0x124/0x3f0
[   31.702032]  tcp_push+0x8b6/0x9c0
[   31.705475]  tcp_sendmsg_locked+0x5445/0x6d20
[   31.709954]  ? local_bh_enable+0x36/0x40
[   31.713994]  ? local_bh_enable+0x36/0x40
[   31.718036]  tcp_sendmsg+0xb2/0x100
[   31.721647]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   31.726298]  inet_sendmsg+0x48d/0x740
[   31.730077]  ? security_socket_sendmsg+0x9e/0x210
[   31.734898]  ? inet_getname+0x500/0x500
[   31.738852]  sock_write_iter+0x3b9/0x470
[   31.742892]  ? sock_read_iter+0x480/0x480
[   31.747022]  __vfs_write+0x719/0x910
[   31.750728]  vfs_write+0x463/0x8d0
[   31.754249]  SYSC_write+0x172/0x360
[   31.757855]  SyS_write+0x55/0x80
[   31.761198]  do_syscall_64+0x309/0x430
[   31.765064]  ? SYSC_read+0x360/0x360
[   31.768758]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   31.773927] RIP: 0033:0x7fd84d568370
[   31.777613] RSP: 002b:00007fff9368fe48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   31.785304] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007fd84d568370
[   31.792554] RDX: 0000000000000138 RSI: 000055726edad430 RDI: 0000000000000003
[   31.799802] RBP: 000055726edad430 R08: 000055726edac270 R09: 000055726d398820
[   31.807053] R10: 00000000c525e8f7 R11: 0000000000000246 R12: 00007fff9368feac
[   31.814311] R13: 0000000000000001 R14: 000055726edb3490 R15: 0000000000000000
[   31.821562] Code: 75 29 48 c7 c7 71 2a a1 87 31 c0 e8 0d 11 86 ff 80 3c 25 a8 a4 2d 88 00 75 11 48 c7 c7 a1 2a a1 87 31 c0 4c 89 fe e8 f2 10 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
[   31.840658] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801b02ee638
[   31.847738] ---[ end trace 795cb0b5c8b322f2 ]---
[   31.852471] Kernel panic - not syncing: Fatal exception in interrupt
[   31.859421] Dumping ftrace buffer:
[   31.862938]    (ftrace buffer empty)
[   31.866626] Kernel Offset: disabled
[   31.870225] Rebooting in 86400 seconds..