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: [   86.105924] Not allocated shadow for addr ffff8801a5580000 (page ffffea0009e01000)
[   86.113679] Attempted to access 270 bytes
[   86.117828] ------------[ cut here ]------------
[   86.122554] kernel BUG at mm/kmsan/kmsan.c:1326!
[   86.127292] invalid opcode: 0000 [#1] SMP PTI
[   86.131759] Dumping ftrace buffer:
[   86.135269]    (ftrace buffer empty)
[   86.138950] Modules linked in:
[   86.142120] CPU: 0 PID: 4519 Comm: sshd Not tainted 4.16.0+ #86
[   86.148157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   86.157496] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   86.163092] RSP: 0018:ffff8801c601e648 EFLAGS: 00010082
[   86.168430] RAX: 000000000000001d RBX: 0000000000000680 RCX: 0000000000000000
[   86.175684] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   86.182935] RBP: ffff8801c601e660 R08: 0000000000000000 R09: 0000000000000001
[   86.190178] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801a5580000
[   86.197429] R13: 000000000000010e R14: 0000000000000001 R15: 000000000000010e
[   86.204674] FS:  00007feeb46597c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   86.212874] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   86.218731] CR2: 00007feeb3aacf70 CR3: 00000001b14de000 CR4: 00000000001406f0
[   86.225976] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   86.233220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   86.240464] Call Trace:
[   86.243030]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   86.248194]  kmsan_unpoison_shadow+0x66/0xb0
[   86.252578]  virtqueue_get_buf_ctx+0x742/0xa20
[   86.257138]  virtqueue_get_buf+0x72/0x90
[   86.261177]  start_xmit+0x293/0x29a0
[   86.264867]  ? packet_rcv+0x21a0/0x21a0
[   86.268820]  ? virtnet_close+0x2c0/0x2c0
[   86.272860]  dev_hard_start_xmit+0x5f1/0xc70
[   86.277256]  sch_direct_xmit+0x540/0x8f0
[   86.281298]  __qdisc_run+0x1785/0x3730
[   86.285165]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   86.290505]  __dev_queue_xmit+0x1d50/0x3520
[   86.294812]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   86.300157]  dev_queue_xmit+0x4b/0x60
[   86.303934]  ip_finish_output2+0x12a1/0x1470
[   86.308323]  ip_finish_output+0xcb2/0xff0
[   86.312452]  ip_output+0x505/0x5d0
[   86.315968]  ? ip_mc_finish_output+0x3b0/0x3b0
[   86.320528]  ? ip_finish_output+0xff0/0xff0
[   86.324825]  ip_queue_xmit+0x1a1e/0x1d10
[   86.328863]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   86.334289]  ? kmsan_set_origin+0x9e/0x160
[   86.338501]  ? ip_output+0x5d0/0x5d0
[   86.342191]  tcp_transmit_skb+0x3d81/0x53d0
[   86.346496]  tcp_write_xmit+0x3911/0xb920
[   86.350634]  __tcp_push_pending_frames+0x124/0x3f0
[   86.355553]  tcp_push+0x8b6/0x9c0
[   86.358985]  tcp_sendmsg_locked+0x5450/0x6cf0
[   86.363473]  ? kmsan_set_origin_inline+0x6b/0x120
[   86.368291]  ? __msan_poison_alloca+0x15c/0x1d0
[   86.372942]  tcp_sendmsg+0xb2/0x100
[   86.376546]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   86.381193]  inet_sendmsg+0x48d/0x740
[   86.384969]  ? security_socket_sendmsg+0x9e/0x210
[   86.389788]  ? inet_getname+0x500/0x500
[   86.393738]  sock_write_iter+0x3b9/0x470
[   86.397777]  ? sock_read_iter+0x480/0x480
[   86.401901]  __vfs_write+0x7fb/0x9f0
[   86.405594]  vfs_write+0x463/0x8d0
[   86.409114]  SYSC_write+0x172/0x360
[   86.412717]  SyS_write+0x55/0x80
[   86.416077]  do_syscall_64+0x309/0x430
[   86.419940]  ? SYSC_read+0x360/0x360
[   86.423632]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   86.428795] RIP: 0033:0x7feeb29f4370
[   86.432481] RSP: 002b:00007ffe6b6a7eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   86.440170] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007feeb29f4370
[   86.447413] RDX: 0000000000000138 RSI: 0000557ab0756450 RDI: 0000000000000003
[   86.454657] RBP: 0000557ab0756450 R08: 0000557ab0754590 R09: 0000557aafcb2820
[   86.461901] R10: 00000000becc8dfc R11: 0000000000000246 R12: 00007ffe6b6a7f1c
[   86.469145] R13: 0000000000000001 R14: 0000557ab075c4b0 R15: 0000000000000000
[   86.476390] Code: 75 29 48 c7 c7 fd 92 7d 8a 31 c0 e8 4d 68 86 ff 80 3c 25 e8 03 2c 8b 00 75 11 48 c7 c7 2d 93 7d 8a 31 c0 4c 89 fe e8 32 68 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
[   86.495469] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801c601e648
[   86.502545] ---[ end trace c33b43f409931341 ]---
[   86.507270] Kernel panic - not syncing: Fatal exception in interrupt
[   86.514125] Dumping ftrace buffer:
[   86.517635]    (ftrace buffer empty)
[   86.521320] Kernel Offset: disabled
[   86.524919] Rebooting in 86400 seconds..