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: [   32.694770] Not allocated shadow for addr ffff8801dc888000 (page ffffea000b2b3300)
[   32.702503] Attempted to access 262 bytes
[   32.706652] ------------[ cut here ]------------
[   32.711385] kernel BUG at mm/kmsan/kmsan.c:1326!
[   32.716138] invalid opcode: 0000 [#1] SMP PTI
[   32.720611] Dumping ftrace buffer:
[   32.724139]    (ftrace buffer empty)
[   32.727837] Modules linked in:
[   32.731029] CPU: 0 PID: 3568 Comm: sshd Not tainted 4.16.0+ #84
[   32.737069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.746423] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   32.752038] RSP: 0018:ffff8801b806e638 EFLAGS: 00010086
[   32.757393] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   32.764656] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   32.771906] RBP: ffff8801b806e650 R08: 0000000000000000 R09: 0000000000000001
[   32.779164] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dc888000
[   32.786421] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   32.793680] FS:  00007f539b00e7c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   32.801887] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.807752] CR2: 00007f539a7c1fb0 CR3: 00000001d6524000 CR4: 00000000001406f0
[   32.815016] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.822291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.829549] Call Trace:
[   32.832136]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   32.837317]  kmsan_unpoison_shadow+0x66/0xb0
[   32.841726]  virtqueue_get_buf_ctx+0x742/0xa20
[   32.846296]  virtqueue_get_buf+0x72/0x90
[   32.850343]  start_xmit+0x276/0x2840
[   32.854058]  ? virtnet_close+0x2c0/0x2c0
[   32.858116]  dev_hard_start_xmit+0x5f1/0xc70
[   32.862538]  sch_direct_xmit+0x540/0x8f0
[   32.866616]  __qdisc_run+0x1785/0x3730
[   32.870495]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   32.875859]  __dev_queue_xmit+0x174a/0x2b60
[   32.880172]  dev_queue_xmit+0x4b/0x60
[   32.883964]  ip_finish_output2+0x1198/0x1380
[   32.888356]  ip_finish_output+0xcb0/0xff0
[   32.892487]  ip_output+0x502/0x5c0
[   32.896011]  ? ip_mc_finish_output+0x3b0/0x3b0
[   32.900594]  ? ip_finish_output+0xff0/0xff0
[   32.904916]  ip_queue_xmit+0x1fae/0x21c0
[   32.908965]  ? __ip_local_out+0x5b0/0x5b0
[   32.913101]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   32.918538]  ? __skb_clone+0x6de/0x980
[   32.922415]  ? ip_output+0x5c0/0x5c0
[   32.926123]  tcp_transmit_skb+0x38be/0x51f0
[   32.930452]  tcp_write_xmit+0x4311/0xb920
[   32.934604]  __tcp_push_pending_frames+0x124/0x3f0
[   32.939530]  tcp_push+0x8b6/0x9c0
[   32.942970]  tcp_sendmsg_locked+0x5445/0x6d20
[   32.947460]  ? local_bh_enable+0x36/0x40
[   32.951504]  ? local_bh_enable+0x36/0x40
[   32.955558]  tcp_sendmsg+0xb2/0x100
[   32.959173]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   32.963826]  inet_sendmsg+0x48d/0x740
[   32.967609]  ? security_socket_sendmsg+0x9e/0x210
[   32.972432]  ? inet_getname+0x500/0x500
[   32.976386]  sock_write_iter+0x3b9/0x470
[   32.980431]  ? sock_read_iter+0x480/0x480
[   32.984559]  __vfs_write+0x719/0x910
[   32.988257]  vfs_write+0x463/0x8d0
[   32.991785]  SYSC_write+0x172/0x360
[   32.995400]  SyS_write+0x55/0x80
[   32.998753]  do_syscall_64+0x309/0x430
[   33.002625]  ? SYSC_read+0x360/0x360
[   33.006343]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   33.011520] RIP: 0033:0x7f53993a9370
[   33.015211] RSP: 002b:00007ffdad0362b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   33.022902] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f53993a9370
[   33.030154] RDX: 0000000000000138 RSI: 000055b5d5c8f440 RDI: 0000000000000003
[   33.037411] RBP: 000055b5d5c8f440 R08: 000055b5d5c8b8f0 R09: 000055b5d4308820
[   33.044661] R10: 000000005c49d0bf R11: 0000000000000246 R12: 00007ffdad03631c
[   33.051914] R13: 0000000000000001 R14: 000055b5d5c954a0 R15: 0000000000000000
[   33.060203] 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 
[   33.079318] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801b806e638
[   33.086500] ---[ end trace b597e7cc02c40382 ]---
[   33.091232] Kernel panic - not syncing: Fatal exception in interrupt
[   33.098302] Dumping ftrace buffer:
[   33.101828]    (ftrace buffer empty)
[   33.105514] Kernel Offset: disabled
[   33.109119] Rebooting in 86400 seconds..