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: [   41.176263] Not allocated shadow for addr ffff8801dc944000 (page ffffea000b2b7980)
[   41.184010] Attempted to access 262 bytes
[   41.188183] ------------[ cut here ]------------
[   41.192930] kernel BUG at mm/kmsan/kmsan.c:1326!
[   41.197672] invalid opcode: 0000 [#1] SMP PTI
[   41.202144] Dumping ftrace buffer:
[   41.205664]    (ftrace buffer empty)
[   41.209364] Modules linked in:
[   41.212543] CPU: 1 PID: 3587 Comm: sshd Not tainted 4.16.0+ #83
[   41.218577] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.227937] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   41.233542] RSP: 0018:ffff8801b360e638 EFLAGS: 00010086
[   41.238891] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   41.246145] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   41.253397] RBP: ffff8801b360e650 R08: 0000000000000000 R09: 0000000000000001
[   41.260647] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dc944000
[   41.267899] R13: 0000000000000106 R14: 0000000000000001 R15: 0000000000000106
[   41.275152] FS:  00007f7a9a5dc7c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   41.283362] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.289226] CR2: 00007f7a99a21100 CR3: 00000001a5e02000 CR4: 00000000001406e0
[   41.296478] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.303725] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.310977] Call Trace:
[   41.313553]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   41.318728]  kmsan_unpoison_shadow+0x66/0xb0
[   41.323119]  virtqueue_get_buf_ctx+0x742/0xa20
[   41.327685]  virtqueue_get_buf+0x72/0x90
[   41.331731]  start_xmit+0x276/0x2840
[   41.335429]  ? virtnet_close+0x2c0/0x2c0
[   41.339476]  dev_hard_start_xmit+0x5f1/0xc70
[   41.343881]  sch_direct_xmit+0x540/0x8f0
[   41.347956]  __qdisc_run+0x1785/0x3730
[   41.351848]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   41.357205]  __dev_queue_xmit+0x174a/0x2b60
[   41.361531]  dev_queue_xmit+0x4b/0x60
[   41.365319]  ip_finish_output2+0x1198/0x1380
[   41.369721]  ip_finish_output+0xcb0/0xff0
[   41.373854]  ip_output+0x502/0x5c0
[   41.377375]  ? ip_mc_finish_output+0x3b0/0x3b0
[   41.381939]  ? ip_finish_output+0xff0/0xff0
[   41.386258]  ip_queue_xmit+0x1fae/0x21c0
[   41.390305]  ? __ip_local_out+0x5b0/0x5b0
[   41.394443]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   41.399877]  ? __skb_clone+0x6de/0x980
[   41.403757]  ? ip_output+0x5c0/0x5c0
[   41.407496]  tcp_transmit_skb+0x38be/0x51f0
[   41.411810]  tcp_write_xmit+0x4311/0xb920
[   41.415952]  __tcp_push_pending_frames+0x124/0x3f0
[   41.420864]  tcp_push+0x8b6/0x9c0
[   41.424322]  tcp_sendmsg_locked+0x5445/0x6d20
[   41.428809]  ? local_bh_enable+0x36/0x40
[   41.432853]  ? local_bh_enable+0x36/0x40
[   41.436897]  tcp_sendmsg+0xb2/0x100
[   41.440504]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   41.445151]  inet_sendmsg+0x48d/0x740
[   41.448931]  ? security_socket_sendmsg+0x9e/0x210
[   41.453753]  ? inet_getname+0x500/0x500
[   41.457709]  sock_write_iter+0x3b9/0x470
[   41.461753]  ? sock_read_iter+0x480/0x480
[   41.465883]  __vfs_write+0x719/0x910
[   41.469583]  vfs_write+0x463/0x8d0
[   41.473109]  SYSC_write+0x172/0x360
[   41.476717]  SyS_write+0x55/0x80
[   41.480064]  do_syscall_64+0x309/0x430
[   41.483930]  ? SYSC_read+0x360/0x360
[   41.487626]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   41.492796] RIP: 0033:0x7f7a98977370
[   41.496483] RSP: 002b:00007ffe2a89f998 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   41.504168] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f7a98977370
[   41.511421] RDX: 0000000000000138 RSI: 0000557355672440 RDI: 0000000000000003
[   41.518673] RBP: 0000557355672440 R08: 00005573556704e0 R09: 0000557353b88820
[   41.525923] R10: 000000009b7e100f R11: 0000000000000246 R12: 00007ffe2a89f9fc
[   41.533172] R13: 0000000000000001 R14: 00005573556784a0 R15: 0000000000000000
[   41.540423] 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 
[   41.559515] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801b360e638
[   41.566597] ---[ end trace c8008e05bb9dee53 ]---
[   41.571328] Kernel panic - not syncing: Fatal exception in interrupt
[   41.578297] Dumping ftrace buffer:
[   41.581825]    (ftrace buffer empty)
[   41.585516] Kernel Offset: disabled
[   41.589121] Rebooting in 86400 seconds..