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: [   31.314926] Not allocated shadow for addr ffff8801dcb1c000 (page ffffea000b2c2a80)
[   31.322656] Attempted to access 262 bytes
[   31.326800] ------------[ cut here ]------------
[   31.331544] kernel BUG at mm/kmsan/kmsan.c:1326!
[   31.336280] invalid opcode: 0000 [#1] SMP PTI
[   31.340746] Dumping ftrace buffer:
[   31.344265]    (ftrace buffer empty)
[   31.347965] Modules linked in:
[   31.351141] CPU: 0 PID: 3563 Comm: sshd Not tainted 4.16.0+ #84
[   31.357167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.366518] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   31.372113] RSP: 0018:ffff8801afa4e638 EFLAGS: 00010086
[   31.377453] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   31.384702] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   31.391948] RBP: ffff8801afa4e650 R08: 0000000000000000 R09: 0000000000000001
[   31.399195] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dcb1c000
[   31.406442] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   31.413688] FS:  00007fa1b08087c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   31.421889] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.427748] CR2: 00007fa1afc5bf70 CR3: 00000001d4d42000 CR4: 00000000001406f0
[   31.434995] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.442257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.449504] Call Trace:
[   31.452089]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   31.457272]  kmsan_unpoison_shadow+0x66/0xb0
[   31.461657]  virtqueue_get_buf_ctx+0x742/0xa20
[   31.466221]  virtqueue_get_buf+0x72/0x90
[   31.470259]  start_xmit+0x276/0x2840
[   31.473952]  ? virtnet_close+0x2c0/0x2c0
[   31.477989]  dev_hard_start_xmit+0x5f1/0xc70
[   31.482391]  sch_direct_xmit+0x540/0x8f0
[   31.486432]  __qdisc_run+0x1785/0x3730
[   31.490301]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   31.495651]  __dev_queue_xmit+0x174a/0x2b60
[   31.499956]  dev_queue_xmit+0x4b/0x60
[   31.503757]  ip_finish_output2+0x1198/0x1380
[   31.508152]  ip_finish_output+0xcb0/0xff0
[   31.512277]  ip_output+0x502/0x5c0
[   31.515800]  ? ip_mc_finish_output+0x3b0/0x3b0
[   31.520359]  ? ip_finish_output+0xff0/0xff0
[   31.524656]  ip_queue_xmit+0x1fae/0x21c0
[   31.528694]  ? __ip_local_out+0x5b0/0x5b0
[   31.532816]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   31.538242]  ? __skb_clone+0x6de/0x980
[   31.542120]  ? ip_output+0x5c0/0x5c0
[   31.545818]  tcp_transmit_skb+0x38be/0x51f0
[   31.550133]  tcp_write_xmit+0x4311/0xb920
[   31.554272]  __tcp_push_pending_frames+0x124/0x3f0
[   31.559177]  tcp_push+0x8b6/0x9c0
[   31.562610]  tcp_sendmsg_locked+0x5445/0x6d20
[   31.567098]  ? local_bh_enable+0x36/0x40
[   31.571138]  ? local_bh_enable+0x36/0x40
[   31.575175]  tcp_sendmsg+0xb2/0x100
[   31.578778]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   31.583423]  inet_sendmsg+0x48d/0x740
[   31.587199]  ? security_socket_sendmsg+0x9e/0x210
[   31.592016]  ? inet_getname+0x500/0x500
[   31.595968]  sock_write_iter+0x3b9/0x470
[   31.600005]  ? sock_read_iter+0x480/0x480
[   31.604127]  __vfs_write+0x719/0x910
[   31.607820]  vfs_write+0x463/0x8d0
[   31.611336]  SYSC_write+0x172/0x360
[   31.614940]  SyS_write+0x55/0x80
[   31.618283]  do_syscall_64+0x309/0x430
[   31.622149]  ? SYSC_read+0x360/0x360
[   31.625850]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   31.631021] RIP: 0033:0x7fa1aeba3370
[   31.634704] RSP: 002b:00007ffc1ab7bfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   31.642386] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007fa1aeba3370
[   31.649639] RDX: 0000000000000138 RSI: 00005651c6c52450 RDI: 0000000000000003
[   31.656892] RBP: 00005651c6c52450 R08: 00005651c6c50590 R09: 00005651c4dfd820
[   31.664145] R10: 00000000c6e65ea2 R11: 0000000000000246 R12: 00007ffc1ab7c01c
[   31.671416] R13: 0000000000000001 R14: 00005651c6c584b0 R15: 0000000000000000
[   31.678672] 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 
[   31.697765] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801afa4e638
[   31.704854] ---[ end trace 8a167df88641472b ]---
[   31.709597] Kernel panic - not syncing: Fatal exception in interrupt
[   31.716536] Dumping ftrace buffer:
[   31.720052]    (ftrace buffer empty)
[   31.723735] Kernel Offset: disabled
[   31.727334] Rebooting in 86400 seconds..
serialport: VM disconnected.