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: [   52.110957] Not allocated shadow for addr ffff8801d455c000 (page ffffea000afa0280)
[   52.118676] Attempted to access 270 bytes
[   52.122820] ------------[ cut here ]------------
[   52.127547] kernel BUG at mm/kmsan/kmsan.c:1326!
[   52.132288] invalid opcode: 0000 [#1] SMP PTI
[   52.136753] Dumping ftrace buffer:
[   52.140265]    (ftrace buffer empty)
[   52.143947] Modules linked in:
[   52.147116] CPU: 0 PID: 4468 Comm: sshd Not tainted 4.16.0+ #87
[   52.153145] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.162483] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   52.168080] RSP: 0018:ffff8801ac63e648 EFLAGS: 00010082
[   52.173415] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000
[   52.180658] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   52.187902] RBP: ffff8801ac63e660 R08: 0000000000000000 R09: 0000000000000001
[   52.195145] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d455c000
[   52.202398] R13: 000000000000010e R14: 0000000000000001 R15: 000000000000010e
[   52.209646] FS:  00007f08b3dc27c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   52.217844] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.223700] CR2: 00007f08b3215f70 CR3: 0000000198e6e000 CR4: 00000000001406f0
[   52.230945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.238188] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.245434] Call Trace:
[   52.247999]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   52.253163]  kmsan_unpoison_shadow+0x66/0xb0
[   52.257547]  virtqueue_get_buf_ctx+0x742/0xa20
[   52.262108]  virtqueue_get_buf+0x72/0x90
[   52.266146]  start_xmit+0x293/0x29a0
[   52.269836]  ? packet_rcv+0x21a0/0x21a0
[   52.273790]  ? virtnet_close+0x2c0/0x2c0
[   52.277828]  dev_hard_start_xmit+0x5f1/0xc70
[   52.282216]  sch_direct_xmit+0x540/0x8f0
[   52.286255]  __qdisc_run+0x1785/0x3730
[   52.290119]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   52.295460]  __dev_queue_xmit+0x1d50/0x3520
[   52.299757]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   52.305098]  dev_queue_xmit+0x4b/0x60
[   52.308873]  ip_finish_output2+0x12a1/0x1470
[   52.313257]  ip_finish_output+0xcb2/0xff0
[   52.317381]  ip_output+0x505/0x5d0
[   52.320896]  ? ip_mc_finish_output+0x3b0/0x3b0
[   52.325456]  ? ip_finish_output+0xff0/0xff0
[   52.329750]  ip_queue_xmit+0x1a1e/0x1d10
[   52.333787]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   52.339211]  ? kmsan_set_origin+0x9e/0x160
[   52.343422]  ? ip_output+0x5d0/0x5d0
[   52.347113]  tcp_transmit_skb+0x3d81/0x53d0
[   52.351413]  tcp_write_xmit+0x3911/0xb920
[   52.355550]  __tcp_push_pending_frames+0x124/0x3f0
[   52.360458]  tcp_push+0x8b6/0x9c0
[   52.363889]  tcp_sendmsg_locked+0x5450/0x6cf0
[   52.368363]  ? kmsan_set_origin_inline+0x6b/0x120
[   52.373183]  ? __msan_poison_alloca+0x15c/0x1d0
[   52.377833]  tcp_sendmsg+0xb2/0x100
[   52.381436]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   52.386085]  inet_sendmsg+0x48d/0x740
[   52.389876]  ? security_socket_sendmsg+0x9e/0x210
[   52.394694]  ? inet_getname+0x500/0x500
[   52.398649]  sock_write_iter+0x3b9/0x470
[   52.402689]  ? sock_read_iter+0x480/0x480
[   52.406813]  __vfs_write+0x7fb/0x9f0
[   52.410506]  vfs_write+0x463/0x8d0
[   52.414022]  SYSC_write+0x172/0x360
[   52.417630]  SyS_write+0x55/0x80
[   52.420973]  do_syscall_64+0x309/0x430
[   52.424835]  ? SYSC_read+0x360/0x360
[   52.428524]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   52.433687] RIP: 0033:0x7f08b215d370
[   52.437373] RSP: 002b:00007ffcc9f42458 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   52.445054] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f08b215d370
[   52.452300] RDX: 0000000000000138 RSI: 000056154f62b450 RDI: 0000000000000003
[   52.459547] RBP: 000056154f62b450 R08: 000056154f629590 R09: 000056154dd57820
[   52.466801] R10: 00000000c0049a6b R11: 0000000000000246 R12: 00007ffcc9f424bc
[   52.474044] R13: 0000000000000001 R14: 000056154f6314b0 R15: 0000000000000000
[   52.481290] 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 
[   52.500367] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801ac63e648
[   52.507449] ---[ end trace fcb93e11ea4d0647 ]---
[   52.512174] Kernel panic - not syncing: Fatal exception in interrupt
[   52.518999] Dumping ftrace buffer:
[   52.522516]    (ftrace buffer empty)
[   52.526209] Kernel Offset: disabled
[   52.529823] Rebooting in 86400 seconds..