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: [   40.658451] Not allocated shadow for addr ffff8801d40e8000 (page ffffea000af85700)
[   40.666506] Attempted to access 270 bytes
[   40.670647] ------------[ cut here ]------------
[   40.675377] kernel BUG at mm/kmsan/kmsan.c:1326!
[   40.680117] invalid opcode: 0000 [#1] SMP PTI
[   40.684584] Dumping ftrace buffer:
[   40.688094]    (ftrace buffer empty)
[   40.691776] Modules linked in:
[   40.694945] CPU: 1 PID: 4510 Comm: sshd Not tainted 4.16.0+ #87
[   40.700976] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.710312] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   40.715906] RSP: 0018:ffff88019a05e648 EFLAGS: 00010082
[   40.721247] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000
[   40.728498] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   40.735744] RBP: ffff88019a05e660 R08: 0000000000000000 R09: 0000000000000001
[   40.742987] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d40e8000
[   40.750231] R13: 000000000000010e R14: 0000000000000001 R15: 000000000000010e
[   40.757475] FS:  00007f1916ba27c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   40.765672] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.771528] CR2: 00007f1915ff5f70 CR3: 000000019a5be000 CR4: 00000000001406e0
[   40.778774] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   40.786022] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   40.793277] Call Trace:
[   40.795846]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   40.801030]  kmsan_unpoison_shadow+0x66/0xb0
[   40.805417]  virtqueue_get_buf_ctx+0x742/0xa20
[   40.809979]  virtqueue_get_buf+0x72/0x90
[   40.814016]  start_xmit+0x293/0x29a0
[   40.817705]  ? packet_rcv+0x21a0/0x21a0
[   40.821655]  ? virtnet_close+0x2c0/0x2c0
[   40.825695]  dev_hard_start_xmit+0x5f1/0xc70
[   40.830085]  sch_direct_xmit+0x540/0x8f0
[   40.834131]  __qdisc_run+0x1785/0x3730
[   40.837997]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   40.843339]  __dev_queue_xmit+0x1d50/0x3520
[   40.847638]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   40.852976]  dev_queue_xmit+0x4b/0x60
[   40.856751]  ip_finish_output2+0x12a1/0x1470
[   40.861137]  ip_finish_output+0xcb2/0xff0
[   40.865265]  ip_output+0x505/0x5d0
[   40.868779]  ? ip_mc_finish_output+0x3b0/0x3b0
[   40.873339]  ? ip_finish_output+0xff0/0xff0
[   40.877632]  ip_queue_xmit+0x1a1e/0x1d10
[   40.881667]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   40.887091]  ? kmsan_set_origin+0x9e/0x160
[   40.891301]  ? ip_output+0x5d0/0x5d0
[   40.894987]  tcp_transmit_skb+0x3d81/0x53d0
[   40.899293]  tcp_write_xmit+0x3911/0xb920
[   40.903430]  __tcp_push_pending_frames+0x124/0x3f0
[   40.908335]  tcp_push+0x8b6/0x9c0
[   40.911767]  tcp_sendmsg_locked+0x5450/0x6cf0
[   40.916242]  ? kmsan_set_origin_inline+0x6b/0x120
[   40.921060]  ? __msan_poison_alloca+0x15c/0x1d0
[   40.925710]  tcp_sendmsg+0xb2/0x100
[   40.929315]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   40.933961]  inet_sendmsg+0x48d/0x740
[   40.937740]  ? security_socket_sendmsg+0x9e/0x210
[   40.942559]  ? inet_getname+0x500/0x500
[   40.946505]  sock_write_iter+0x3b9/0x470
[   40.950545]  ? sock_read_iter+0x480/0x480
[   40.954670]  __vfs_write+0x7fb/0x9f0
[   40.958361]  vfs_write+0x463/0x8d0
[   40.961878]  SYSC_write+0x172/0x360
[   40.965481]  SyS_write+0x55/0x80
[   40.968823]  do_syscall_64+0x309/0x430
[   40.972687]  ? SYSC_read+0x360/0x360
[   40.976386]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   40.981548] RIP: 0033:0x7f1914f3d370
[   40.985233] RSP: 002b:00007ffede3c1a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   40.992913] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f1914f3d370
[   41.000156] RDX: 0000000000000138 RSI: 0000559962b9f440 RDI: 0000000000000003
[   41.007399] RBP: 0000559962b9f440 R08: 0000559962b9b8f0 R09: 000055996143a820
[   41.014642] R10: 0000000037395c30 R11: 0000000000000246 R12: 00007ffede3c1a7c
[   41.021885] R13: 0000000000000001 R14: 0000559962ba54a0 R15: 0000000000000000
[   41.029128] 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 
[   41.048202] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff88019a05e648
[   41.055278] ---[ end trace 9367d698e7d9f3d7 ]---
[   41.060002] Kernel panic - not syncing: Fatal exception in interrupt
[   41.066968] Dumping ftrace buffer:
[   41.070484]    (ftrace buffer empty)
[   41.074170] Kernel Offset: disabled
[   41.077770] Rebooting in 86400 seconds..