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: [   31.072324] Not allocated shadow for addr ffff8801dca8c000 (page ffffea000b2bf480)
[   31.080069] Attempted to access 774 bytes
[   31.084209] ------------[ cut here ]------------
[   31.088935] kernel BUG at mm/kmsan/kmsan.c:1326!
[   31.093676] invalid opcode: 0000 [#1] SMP PTI
[   31.098151] Dumping ftrace buffer:
[   31.101669]    (ftrace buffer empty)
[   31.105352] Modules linked in:
[   31.108524] CPU: 0 PID: 3581 Comm: sshd Not tainted 4.16.0+ #83
[   31.114553] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.124003] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   31.129596] RSP: 0018:ffff8801a567e638 EFLAGS: 00010086
[   31.134933] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   31.142293] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   31.149537] RBP: ffff8801a567e650 R08: 0000000000000000 R09: 0000000000000001
[   31.156780] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dca8c000
[   31.164028] R13: 0000000000000306 R14: 0000000000000001 R15: 0000000000000306
[   31.171278] FS:  00007fc1c71267c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   31.179581] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.185435] CR2: 00007fc1c6579f70 CR3: 00000001a5bae000 CR4: 00000000001406f0
[   31.192682] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.199930] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.207175] Call Trace:
[   31.209748]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   31.214918]  kmsan_unpoison_shadow+0x66/0xb0
[   31.219304]  virtqueue_get_buf_ctx+0x742/0xa20
[   31.223864]  virtqueue_get_buf+0x72/0x90
[   31.227903]  start_xmit+0x276/0x2840
[   31.231596]  ? virtnet_close+0x2c0/0x2c0
[   31.235637]  dev_hard_start_xmit+0x5f1/0xc70
[   31.240099]  sch_direct_xmit+0x540/0x8f0
[   31.244139]  __qdisc_run+0x1785/0x3730
[   31.248008]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   31.253353]  __dev_queue_xmit+0x174a/0x2b60
[   31.257658]  dev_queue_xmit+0x4b/0x60
[   31.261437]  ip_finish_output2+0x1198/0x1380
[   31.265822]  ip_finish_output+0xcb0/0xff0
[   31.269946]  ip_output+0x502/0x5c0
[   31.273462]  ? ip_mc_finish_output+0x3b0/0x3b0
[   31.278026]  ? ip_finish_output+0xff0/0xff0
[   31.282331]  ip_queue_xmit+0x1fae/0x21c0
[   31.287192]  ? __ip_local_out+0x5b0/0x5b0
[   31.291322]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   31.296793]  ? __skb_clone+0x6de/0x980
[   31.300694]  ? ip_output+0x5c0/0x5c0
[   31.304480]  tcp_transmit_skb+0x38be/0x51f0
[   31.308781]  tcp_write_xmit+0x4311/0xb920
[   31.312916]  __tcp_push_pending_frames+0x124/0x3f0
[   31.317826]  tcp_push+0x8b6/0x9c0
[   31.321258]  tcp_sendmsg_locked+0x5445/0x6d20
[   31.325736]  ? local_bh_enable+0x36/0x40
[   31.329773]  ? local_bh_enable+0x36/0x40
[   31.333809]  tcp_sendmsg+0xb2/0x100
[   31.337412]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   31.342058]  inet_sendmsg+0x48d/0x740
[   31.345834]  ? security_socket_sendmsg+0x9e/0x210
[   31.350654]  ? inet_getname+0x500/0x500
[   31.354604]  sock_write_iter+0x3b9/0x470
[   31.358683]  ? sock_read_iter+0x480/0x480
[   31.362806]  __vfs_write+0x719/0x910
[   31.366503]  vfs_write+0x463/0x8d0
[   31.370020]  SYSC_write+0x172/0x360
[   31.373636]  SyS_write+0x55/0x80
[   31.376982]  do_syscall_64+0x309/0x430
[   31.380847]  ? SYSC_read+0x360/0x360
[   31.384541]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   31.389705] RIP: 0033:0x7fc1c54c1370
[   31.393389] RSP: 002b:00007ffee3babb38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   31.401081] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007fc1c54c1370
[   31.408330] RDX: 0000000000000138 RSI: 0000561233733440 RDI: 0000000000000003
[   31.415586] RBP: 0000561233733440 R08: 0000561233731240 R09: 00005612332d4820
[   31.422833] R10: 0000000039c4b15d R11: 0000000000000246 R12: 00007ffee3babb9c
[   31.430075] R13: 0000000000000001 R14: 00005612337394a0 R15: 0000000000000000
[   31.437436] 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 
[   31.456524] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801a567e638
[   31.463606] ---[ end trace 48dd426281415dca ]---
[   31.468336] Kernel panic - not syncing: Fatal exception in interrupt
[   31.475304] Dumping ftrace buffer:
[   31.478820]    (ftrace buffer empty)
[   31.482500] Kernel Offset: disabled
[   31.486100] Rebooting in 86400 seconds..