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: [   32.010772] Not allocated shadow for addr ffff8801dcad8000 (page ffffea000b2c1100)
[   32.018500] Attempted to access 774 bytes
[   32.022643] ------------[ cut here ]------------
[   32.027379] kernel BUG at mm/kmsan/kmsan.c:1326!
[   32.032114] invalid opcode: 0000 [#1] SMP PTI
[   32.036581] Dumping ftrace buffer:
[   32.040089]    (ftrace buffer empty)
[   32.043774] Modules linked in:
[   32.046946] CPU: 1 PID: 3568 Comm: sshd Not tainted 4.16.0+ #82
[   32.052974] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.062316] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   32.067912] RSP: 0018:ffff8801aaebe638 EFLAGS: 00010086
[   32.073253] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   32.080499] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   32.087744] RBP: ffff8801aaebe650 R08: 0000000000000000 R09: 0000000000000001
[   32.094993] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dcad8000
[   32.102239] R13: 0000000000000306 R14: 0000000000000001 R15: 0000000000000306
[   32.109487] FS:  00007f41a0a9f7c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   32.117776] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.123634] CR2: 00007f41a0252fb0 CR3: 00000001d1180000 CR4: 00000000001406e0
[   32.130891] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.138145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.145393] Call Trace:
[   32.147973]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   32.153144]  kmsan_unpoison_shadow+0x66/0xb0
[   32.157535]  virtqueue_get_buf_ctx+0x742/0xa20
[   32.162107]  virtqueue_get_buf+0x72/0x90
[   32.166147]  start_xmit+0x276/0x2840
[   32.169845]  ? virtnet_close+0x2c0/0x2c0
[   32.173883]  dev_hard_start_xmit+0x5f1/0xc70
[   32.178275]  sch_direct_xmit+0x540/0x8f0
[   32.182318]  __qdisc_run+0x1785/0x3730
[   32.186183]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   32.191527]  __dev_queue_xmit+0x174a/0x2b60
[   32.195829]  dev_queue_xmit+0x4b/0x60
[   32.199607]  ip_finish_output2+0x1198/0x1380
[   32.203996]  ip_finish_output+0xcb0/0xff0
[   32.208121]  ip_output+0x502/0x5c0
[   32.211638]  ? ip_mc_finish_output+0x3b0/0x3b0
[   32.216200]  ? ip_finish_output+0xff0/0xff0
[   32.220495]  ip_queue_xmit+0x1fae/0x21c0
[   32.224541]  ? __ip_local_out+0x5b0/0x5b0
[   32.228673]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   32.234096]  ? __skb_clone+0x6de/0x980
[   32.237964]  ? ip_output+0x5c0/0x5c0
[   32.241651]  tcp_transmit_skb+0x38be/0x51f0
[   32.245953]  tcp_write_xmit+0x4311/0xb920
[   32.250090]  __tcp_push_pending_frames+0x124/0x3f0
[   32.254995]  tcp_push+0x8b6/0x9c0
[   32.258433]  tcp_sendmsg_locked+0x5445/0x6d20
[   32.262910]  ? local_bh_enable+0x36/0x40
[   32.266947]  ? local_bh_enable+0x36/0x40
[   32.270994]  tcp_sendmsg+0xb2/0x100
[   32.274598]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   32.279241]  inet_sendmsg+0x48d/0x740
[   32.283035]  ? security_socket_sendmsg+0x9e/0x210
[   32.287852]  ? inet_getname+0x500/0x500
[   32.291801]  sock_write_iter+0x3b9/0x470
[   32.295840]  ? sock_read_iter+0x480/0x480
[   32.299962]  __vfs_write+0x719/0x910
[   32.303654]  vfs_write+0x463/0x8d0
[   32.307171]  SYSC_write+0x172/0x360
[   32.310776]  SyS_write+0x55/0x80
[   32.314118]  do_syscall_64+0x309/0x430
[   32.317979]  ? SYSC_read+0x360/0x360
[   32.321669]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   32.326834] RIP: 0033:0x7f419ee3a370
[   32.330541] RSP: 002b:00007ffe9ce75398 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   32.338224] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f419ee3a370
[   32.345475] RDX: 0000000000000138 RSI: 00005624d4a61440 RDI: 0000000000000003
[   32.352721] RBP: 00005624d4a61440 R08: 00005624d4a5f590 R09: 00005624d3a51820
[   32.359966] R10: 000000000b5cce9c R11: 0000000000000246 R12: 00007ffe9ce753fc
[   32.367213] R13: 0000000000000001 R14: 00005624d4a674a0 R15: 0000000000000000
[   32.374461] 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 
[   32.393545] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801aaebe638
[   32.400622] ---[ end trace a446e573a2aa36f5 ]---
[   32.405350] Kernel panic - not syncing: Fatal exception in interrupt
[   32.412300] Dumping ftrace buffer:
[   32.415817]    (ftrace buffer empty)
[   32.419499] Kernel Offset: disabled
[   32.423099] Rebooting in 86400 seconds..