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: [   78.319517] Not allocated shadow for addr ffff8801de784000 (page ffffea000b36d180)
[   78.327231] Attempted to access 262 bytes
[   78.331370] ------------[ cut here ]------------
[   78.336093] kernel BUG at mm/kmsan/kmsan.c:1326!
[   78.340826] invalid opcode: 0000 [#1] SMP PTI
[   78.345291] Dumping ftrace buffer:
[   78.348800]    (ftrace buffer empty)
[   78.352481] Modules linked in:
[   78.355652] CPU: 1 PID: 3572 Comm: sshd Not tainted 4.16.0+ #84
[   78.361683] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   78.371025] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   78.376619] RSP: 0018:ffff8801aaa8e638 EFLAGS: 00010086
[   78.381956] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   78.389206] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   78.396453] RBP: ffff8801aaa8e650 R08: 0000000000000000 R09: 0000000000000001
[   78.403700] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801de784000
[   78.410943] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   78.418188] FS:  00007f4f89a2e7c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   78.426390] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.432243] CR2: 00007f4f891e1fb0 CR3: 00000001abef0000 CR4: 00000000001406e0
[   78.439486] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   78.446730] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   78.453974] Call Trace:
[   78.456541]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   78.461706]  kmsan_unpoison_shadow+0x66/0xb0
[   78.466088]  virtqueue_get_buf_ctx+0x742/0xa20
[   78.470646]  virtqueue_get_buf+0x72/0x90
[   78.474684]  start_xmit+0x276/0x2840
[   78.478375]  ? virtnet_close+0x2c0/0x2c0
[   78.482411]  dev_hard_start_xmit+0x5f1/0xc70
[   78.486799]  sch_direct_xmit+0x540/0x8f0
[   78.490838]  __qdisc_run+0x1785/0x3730
[   78.494704]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   78.500046]  __dev_queue_xmit+0x174a/0x2b60
[   78.504353]  dev_queue_xmit+0x4b/0x60
[   78.508130]  ip_finish_output2+0x1198/0x1380
[   78.512514]  ip_finish_output+0xcb0/0xff0
[   78.516638]  ip_output+0x502/0x5c0
[   78.520150]  ? ip_mc_finish_output+0x3b0/0x3b0
[   78.524707]  ? ip_finish_output+0xff0/0xff0
[   78.529001]  ip_queue_xmit+0x1fae/0x21c0
[   78.533037]  ? __ip_local_out+0x5b0/0x5b0
[   78.537158]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   78.542585]  ? __skb_clone+0x6de/0x980
[   78.546449]  ? ip_output+0x5c0/0x5c0
[   78.550138]  tcp_transmit_skb+0x38be/0x51f0
[   78.554437]  tcp_write_xmit+0x4311/0xb920
[   78.558570]  __tcp_push_pending_frames+0x124/0x3f0
[   78.563473]  tcp_push+0x8b6/0x9c0
[   78.566903]  tcp_sendmsg_locked+0x5445/0x6d20
[   78.571376]  ? local_bh_enable+0x36/0x40
[   78.575415]  ? local_bh_enable+0x36/0x40
[   78.579461]  tcp_sendmsg+0xb2/0x100
[   78.583064]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   78.587709]  inet_sendmsg+0x48d/0x740
[   78.591484]  ? security_socket_sendmsg+0x9e/0x210
[   78.596299]  ? inet_getname+0x500/0x500
[   78.600249]  sock_write_iter+0x3b9/0x470
[   78.604293]  ? sock_read_iter+0x480/0x480
[   78.608414]  __vfs_write+0x719/0x910
[   78.612105]  vfs_write+0x463/0x8d0
[   78.615623]  SYSC_write+0x172/0x360
[   78.619225]  SyS_write+0x55/0x80
[   78.622565]  do_syscall_64+0x309/0x430
[   78.626429]  ? SYSC_read+0x360/0x360
[   78.630117]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   78.635280] RIP: 0033:0x7f4f87dc9370
[   78.638962] RSP: 002b:00007ffc355174f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   78.646643] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f4f87dc9370
[   78.653887] RDX: 0000000000000138 RSI: 0000562124098430 RDI: 0000000000000003
[   78.661132] RBP: 0000562124098430 R08: 0000562124097270 R09: 0000562122483820
[   78.668376] R10: 0000000035d33fa4 R11: 0000000000000246 R12: 00007ffc3551755c
[   78.675619] R13: 0000000000000001 R14: 000056212409e490 R15: 0000000000000000
[   78.682865] 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 
[   78.701940] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801aaa8e638
[   78.709014] ---[ end trace 50300f87b518a3e3 ]---
[   78.713742] Kernel panic - not syncing: Fatal exception in interrupt
[   78.720620] Dumping ftrace buffer:
[   78.724137]    (ftrace buffer empty)
[   78.727818] Kernel Offset: disabled
[   78.731417] Rebooting in 86400 seconds..