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: [   47.447628] Not allocated shadow for addr ffff8801d436c000 (page ffffea000af94880)
[   47.455361] Attempted to access 782 bytes
[   47.459506] ------------[ cut here ]------------
[   47.464231] kernel BUG at mm/kmsan/kmsan.c:1326!
[   47.468974] invalid opcode: 0000 [#1] SMP PTI
[   47.473446] Dumping ftrace buffer:
[   47.476955]    (ftrace buffer empty)
[   47.480644] Modules linked in:
[   47.483814] CPU: 0 PID: 4506 Comm: sshd Not tainted 4.16.0+ #87
[   47.489842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.499176] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   47.504770] RSP: 0018:ffff8801ca26e648 EFLAGS: 00010082
[   47.510114] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000
[   47.517357] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   47.524600] RBP: ffff8801ca26e660 R08: 0000000000000000 R09: 0000000000000001
[   47.531844] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d436c000
[   47.539087] R13: 000000000000030e R14: 0000000000000001 R15: 000000000000030e
[   47.546338] FS:  00007f38dac977c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   47.554548] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.560407] CR2: 00007f38da0eaf70 CR3: 00000001a22d2000 CR4: 00000000001406f0
[   47.567650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.574900] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.582149] Call Trace:
[   47.584720]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   47.589885]  kmsan_unpoison_shadow+0x66/0xb0
[   47.594270]  virtqueue_get_buf_ctx+0x742/0xa20
[   47.598830]  virtqueue_get_buf+0x72/0x90
[   47.602873]  start_xmit+0x293/0x29a0
[   47.606562]  ? packet_rcv+0x21a0/0x21a0
[   47.610513]  ? virtnet_close+0x2c0/0x2c0
[   47.614549]  dev_hard_start_xmit+0x5f1/0xc70
[   47.618941]  sch_direct_xmit+0x540/0x8f0
[   47.622980]  __qdisc_run+0x1785/0x3730
[   47.626845]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   47.632193]  __dev_queue_xmit+0x1d50/0x3520
[   47.636491]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   47.641836]  dev_queue_xmit+0x4b/0x60
[   47.645611]  ip_finish_output2+0x12a1/0x1470
[   47.650006]  ip_finish_output+0xcb2/0xff0
[   47.654133]  ip_output+0x505/0x5d0
[   47.657653]  ? ip_mc_finish_output+0x3b0/0x3b0
[   47.662210]  ? ip_finish_output+0xff0/0xff0
[   47.666506]  ip_queue_xmit+0x1a1e/0x1d10
[   47.670546]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   47.675979]  ? kmsan_set_origin+0x9e/0x160
[   47.680190]  ? ip_output+0x5d0/0x5d0
[   47.683879]  tcp_transmit_skb+0x3d81/0x53d0
[   47.688188]  tcp_write_xmit+0x3911/0xb920
[   47.692337]  __tcp_push_pending_frames+0x124/0x3f0
[   47.697258]  tcp_push+0x8b6/0x9c0
[   47.700692]  tcp_sendmsg_locked+0x5450/0x6cf0
[   47.705166]  ? kmsan_set_origin_inline+0x6b/0x120
[   47.709990]  ? __msan_poison_alloca+0x15c/0x1d0
[   47.714645]  tcp_sendmsg+0xb2/0x100
[   47.718256]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   47.722904]  inet_sendmsg+0x48d/0x740
[   47.726693]  ? security_socket_sendmsg+0x9e/0x210
[   47.731536]  ? inet_getname+0x500/0x500
[   47.735511]  sock_write_iter+0x3b9/0x470
[   47.739556]  ? sock_read_iter+0x480/0x480
[   47.743690]  __vfs_write+0x7fb/0x9f0
[   47.747383]  vfs_write+0x463/0x8d0
[   47.750905]  SYSC_write+0x172/0x360
[   47.754511]  SyS_write+0x55/0x80
[   47.757855]  do_syscall_64+0x309/0x430
[   47.761726]  ? SYSC_read+0x360/0x360
[   47.765417]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   47.770581] RIP: 0033:0x7f38d9032370
[   47.774265] RSP: 002b:00007ffd121be128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   47.781945] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f38d9032370
[   47.789198] RDX: 0000000000000138 RSI: 0000559288826440 RDI: 0000000000000003
[   47.796442] RBP: 0000559288826440 R08: 0000559288824240 R09: 000055928758d820
[   47.803688] R10: 00000000cae9a445 R11: 0000000000000246 R12: 00007ffd121be18c
[   47.810940] R13: 0000000000000001 R14: 000055928882c4a0 R15: 0000000000000000
[   47.818198] 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 
[   47.837273] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801ca26e648
[   47.844347] ---[ end trace 3ccff4b251a4bdcb ]---
[   47.849073] Kernel panic - not syncing: Fatal exception in interrupt
[   47.855953] Dumping ftrace buffer:
[   47.859468]    (ftrace buffer empty)
[   47.863161] Kernel Offset: disabled
[   47.866765] Rebooting in 86400 seconds..