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: [   32.313780] Not allocated shadow for addr ffff8801dc8bc000 (page ffffea000b2b4680)
[   32.321515] Attempted to access 774 bytes
[   32.325663] ------------[ cut here ]------------
[   32.330391] kernel BUG at mm/kmsan/kmsan.c:1326!
[   32.335126] invalid opcode: 0000 [#1] SMP PTI
[   32.339594] Dumping ftrace buffer:
[   32.343112]    (ftrace buffer empty)
[   32.346797] Modules linked in:
[   32.349968] CPU: 1 PID: 3573 Comm: sshd Not tainted 4.16.0+ #84
[   32.356003] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.365346] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   32.370946] RSP: 0018:ffff8801d553e638 EFLAGS: 00010086
[   32.376286] RAX: 000000000000001d RBX: 0000000000000760 RCX: 0000000000000000
[   32.383532] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   32.390779] RBP: ffff8801d553e650 R08: 0000000000000000 R09: 0000000000000001
[   32.398032] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dc8bc000
[   32.405277] R13: 0000000000000306 R14: 0000000000000001 R15: 0000000000000306
[   32.412526] FS:  00007ffa042e27c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   32.420726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.426586] CR2: 00007ffa03735f70 CR3: 00000001d50fa000 CR4: 00000000001406e0
[   32.433833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.441086] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.448341] Call Trace:
[   32.450913]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   32.456090]  kmsan_unpoison_shadow+0x66/0xb0
[   32.460480]  virtqueue_get_buf_ctx+0x742/0xa20
[   32.465056]  virtqueue_get_buf+0x72/0x90
[   32.469111]  start_xmit+0x276/0x2840
[   32.472813]  ? virtnet_close+0x2c0/0x2c0
[   32.476853]  dev_hard_start_xmit+0x5f1/0xc70
[   32.481241]  sch_direct_xmit+0x540/0x8f0
[   32.485291]  __qdisc_run+0x1785/0x3730
[   32.489165]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   32.494510]  __dev_queue_xmit+0x174a/0x2b60
[   32.498815]  dev_queue_xmit+0x4b/0x60
[   32.502594]  ip_finish_output2+0x1198/0x1380
[   32.506980]  ip_finish_output+0xcb0/0xff0
[   32.511574]  ip_output+0x502/0x5c0
[   32.515091]  ? ip_mc_finish_output+0x3b0/0x3b0
[   32.519650]  ? ip_finish_output+0xff0/0xff0
[   32.523947]  ip_queue_xmit+0x1fae/0x21c0
[   32.527983]  ? __ip_local_out+0x5b0/0x5b0
[   32.532109]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   32.537537]  ? __skb_clone+0x6de/0x980
[   32.541406]  ? ip_output+0x5c0/0x5c0
[   32.545102]  tcp_transmit_skb+0x38be/0x51f0
[   32.549416]  tcp_write_xmit+0x4311/0xb920
[   32.553553]  __tcp_push_pending_frames+0x124/0x3f0
[   32.558460]  tcp_push+0x8b6/0x9c0
[   32.561892]  tcp_sendmsg_locked+0x5445/0x6d20
[   32.566369]  ? local_bh_enable+0x36/0x40
[   32.570410]  ? local_bh_enable+0x36/0x40
[   32.574451]  tcp_sendmsg+0xb2/0x100
[   32.578054]  ? tcp_sendmsg_locked+0x6d20/0x6d20
[   32.582700]  inet_sendmsg+0x48d/0x740
[   32.586477]  ? security_socket_sendmsg+0x9e/0x210
[   32.591299]  ? inet_getname+0x500/0x500
[   32.595262]  sock_write_iter+0x3b9/0x470
[   32.599306]  ? sock_read_iter+0x480/0x480
[   32.603436]  __vfs_write+0x719/0x910
[   32.607131]  vfs_write+0x463/0x8d0
[   32.610649]  SYSC_write+0x172/0x360
[   32.614254]  SyS_write+0x55/0x80
[   32.617598]  do_syscall_64+0x309/0x430
[   32.621465]  ? SYSC_read+0x360/0x360
[   32.625157]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   32.630322] RIP: 0033:0x7ffa0267d370
[   32.634007] RSP: 002b:00007ffebb47c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   32.641699] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007ffa0267d370
[   32.648954] RDX: 0000000000000138 RSI: 000056419d9f4440 RDI: 0000000000000003
[   32.656205] RBP: 000056419d9f4440 R08: 000056419d9f24e0 R09: 000056419d7e5820
[   32.663453] R10: 000000001ba2aae9 R11: 0000000000000246 R12: 00007ffebb47c27c
[   32.670708] R13: 0000000000000001 R14: 000056419d9fa4a0 R15: 0000000000000000
[   32.677962] 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 
[   32.697057] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801d553e638
[   32.704154] ---[ end trace dec286b193353a36 ]---
[   32.708883] Kernel panic - not syncing: Fatal exception in interrupt
[   32.715819] Dumping ftrace buffer:
[   32.719339]    (ftrace buffer empty)
[   32.723021] Kernel Offset: disabled
[   32.726622] Rebooting in 86400 seconds..