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: [  800.520001] Not allocated shadow for addr ffff880199228000 (page ffffea000996cf00)
[  800.527780] Attempted to access 782 bytes
[  800.531923] ------------[ cut here ]------------
[  800.536648] kernel BUG at mm/kmsan/kmsan.c:1326!
[  800.541402] invalid opcode: 0000 [#1] SMP PTI
[  800.545891] Dumping ftrace buffer:
[  800.549401]    (ftrace buffer empty)
[  800.553088] Modules linked in:
[  800.556260] CPU: 0 PID: 4462 Comm: sshd Not tainted 4.16.0+ #87
[  800.562290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  800.571658] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[  800.577254] RSP: 0018:ffff8801d8efe648 EFLAGS: 00010082
[  800.582590] RAX: 000000000000001d RBX: 0000000000000660 RCX: 0000000000000000
[  800.589833] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[  800.597081] RBP: ffff8801d8efe660 R08: 0000000000000000 R09: 0000000000000001
[  800.604325] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880199228000
[  800.611581] R13: 000000000000030e R14: 0000000000000001 R15: 000000000000030e
[  800.618839] FS:  00007f7bc15a67c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[  800.627039] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  800.632893] CR2: 00007f7bc09f9f70 CR3: 000000019e884000 CR4: 00000000001406f0
[  800.640143] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  800.647385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  800.654626] Call Trace:
[  800.657193]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[  800.662365]  kmsan_unpoison_shadow+0x66/0xb0
[  800.666801]  virtqueue_get_buf_ctx+0x742/0xa20
[  800.671359]  virtqueue_get_buf+0x72/0x90
[  800.675413]  start_xmit+0x293/0x29a0
[  800.679127]  ? packet_rcv+0x21a0/0x21a0
[  800.683091]  ? virtnet_close+0x2c0/0x2c0
[  800.687148]  dev_hard_start_xmit+0x5f1/0xc70
[  800.691555]  sch_direct_xmit+0x540/0x8f0
[  800.695595]  __qdisc_run+0x1785/0x3730
[  800.699459]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  800.704806]  __dev_queue_xmit+0x1d50/0x3520
[  800.709102]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  800.714444]  dev_queue_xmit+0x4b/0x60
[  800.718247]  ip_finish_output2+0x12a1/0x1470
[  800.722641]  ip_finish_output+0xcb2/0xff0
[  800.726765]  ip_output+0x505/0x5d0
[  800.730288]  ? ip_mc_finish_output+0x3b0/0x3b0
[  800.734846]  ? ip_finish_output+0xff0/0xff0
[  800.739149]  ip_queue_xmit+0x1a1e/0x1d10
[  800.743191]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[  800.748618]  ? kmsan_set_origin+0x9e/0x160
[  800.752844]  ? ip_output+0x5d0/0x5d0
[  800.756560]  tcp_transmit_skb+0x3d81/0x53d0
[  800.760870]  tcp_write_xmit+0x3911/0xb920
[  800.765018]  __tcp_push_pending_frames+0x124/0x3f0
[  800.769929]  tcp_push+0x8b6/0x9c0
[  800.773379]  tcp_sendmsg_locked+0x5450/0x6cf0
[  800.777872]  ? kmsan_set_origin_inline+0x6b/0x120
[  800.782697]  ? __msan_poison_alloca+0x15c/0x1d0
[  800.787347]  tcp_sendmsg+0xb2/0x100
[  800.790951]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[  800.795616]  inet_sendmsg+0x48d/0x740
[  800.799434]  ? security_socket_sendmsg+0x9e/0x210
[  800.804254]  ? inet_getname+0x500/0x500
[  800.808228]  sock_write_iter+0x3b9/0x470
[  800.812269]  ? sock_read_iter+0x480/0x480
[  800.816394]  __vfs_write+0x7fb/0x9f0
[  800.820088]  vfs_write+0x463/0x8d0
[  800.823614]  SYSC_write+0x172/0x360
[  800.827219]  SyS_write+0x55/0x80
[  800.830562]  do_syscall_64+0x309/0x430
[  800.834426]  ? SYSC_read+0x360/0x360
[  800.838160]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[  800.843324] RIP: 0033:0x7f7bbf941370
[  800.847020] RSP: 002b:00007ffcbab84fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  800.854702] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f7bbf941370
[  800.861953] RDX: 0000000000000138 RSI: 00005624bce2f430 RDI: 0000000000000003
[  800.869196] RBP: 00005624bce2f430 R08: 00005624bce2e270 R09: 00005624bc651820
[  800.876439] R10: 000000006b880067 R11: 0000000000000246 R12: 00007ffcbab8501c
[  800.883684] R13: 0000000000000001 R14: 00005624bce35490 R15: 0000000000000000
[  800.890930] 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 
[  800.910005] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801d8efe648
[  800.917176] ---[ end trace 1a1047d58727da8f ]---
[  800.921901] Kernel panic - not syncing: Fatal exception in interrupt
[  800.928766] Dumping ftrace buffer:
[  800.932276]    (ftrace buffer empty)
[  800.936004] Kernel Offset: disabled
[  800.939609] Rebooting in 86400 seconds..