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: [   43.295640] Not allocated shadow for addr ffff8801d4078000 (page ffffea000af82d00)
[   43.303364] Attempted to access 270 bytes
[   43.307505] ------------[ cut here ]------------
[   43.312237] kernel BUG at mm/kmsan/kmsan.c:1326!
[   43.316975] invalid opcode: 0000 [#1] SMP PTI
[   43.321441] Dumping ftrace buffer:
[   43.324952]    (ftrace buffer empty)
[   43.328640] Modules linked in:
[   43.331812] CPU: 0 PID: 4515 Comm: sshd Not tainted 4.16.0+ #85
[   43.337841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.347179] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[   43.352773] RSP: 0018:ffff8801993be648 EFLAGS: 00010082
[   43.358114] RAX: 000000000000001d RBX: 0000000000000740 RCX: 0000000000000000
[   43.365365] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[   43.372611] RBP: ffff8801993be660 R08: 0000000000000000 R09: 0000000000000001
[   43.379855] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d4078000
[   43.387102] R13: 000000000000010e R14: 0000000000000001 R15: 000000000000010e
[   43.394359] FS:  00007f22a56e87c0(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   43.402569] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.408424] CR2: 00007f22a4b3bf70 CR3: 0000000197df2000 CR4: 00000000001406f0
[   43.415669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.422916] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.430159] Call Trace:
[   43.432726]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[   43.437894]  kmsan_unpoison_shadow+0x66/0xb0
[   43.442285]  virtqueue_get_buf_ctx+0x742/0xa20
[   43.446850]  virtqueue_get_buf+0x72/0x90
[   43.450896]  start_xmit+0x293/0x29a0
[   43.454588]  ? packet_rcv+0x21a0/0x21a0
[   43.458540]  ? virtnet_close+0x2c0/0x2c0
[   43.462589]  dev_hard_start_xmit+0x5f1/0xc70
[   43.466980]  sch_direct_xmit+0x540/0x8f0
[   43.471021]  __qdisc_run+0x1785/0x3730
[   43.474886]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   43.480232]  __dev_queue_xmit+0x1d50/0x3520
[   43.484530]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   43.489873]  dev_queue_xmit+0x4b/0x60
[   43.493652]  ip_finish_output2+0x12a1/0x1470
[   43.498050]  ip_finish_output+0xcb2/0xff0
[   43.502191]  ip_output+0x505/0x5d0
[   43.505709]  ? ip_mc_finish_output+0x3b0/0x3b0
[   43.510270]  ? ip_finish_output+0xff0/0xff0
[   43.514572]  ip_queue_xmit+0x1a1e/0x1d10
[   43.518614]  ? __msan_metadata_ptr_for_store_2+0x13/0x20
[   43.524045]  ? kmsan_set_origin+0x9e/0x160
[   43.528261]  ? ip_output+0x5d0/0x5d0
[   43.531960]  tcp_transmit_skb+0x3d81/0x53d0
[   43.536266]  tcp_write_xmit+0x3911/0xb920
[   43.540406]  __tcp_push_pending_frames+0x124/0x3f0
[   43.545315]  tcp_push+0x8b6/0x9c0
[   43.548761]  tcp_sendmsg_locked+0x5450/0x6cf0
[   43.553245]  ? kmsan_set_origin_inline+0x6b/0x120
[   43.558077]  ? __msan_poison_alloca+0x15c/0x1d0
[   43.562748]  tcp_sendmsg+0xb2/0x100
[   43.566356]  ? tcp_sendmsg_locked+0x6cf0/0x6cf0
[   43.571004]  inet_sendmsg+0x48d/0x740
[   43.574784]  ? security_socket_sendmsg+0x9e/0x210
[   43.579605]  ? inet_getname+0x500/0x500
[   43.583562]  sock_write_iter+0x3b9/0x470
[   43.587611]  ? sock_read_iter+0x480/0x480
[   43.591745]  __vfs_write+0x7fb/0x9f0
[   43.595450]  vfs_write+0x463/0x8d0
[   43.598978]  SYSC_write+0x172/0x360
[   43.602591]  SyS_write+0x55/0x80
[   43.605935]  do_syscall_64+0x309/0x430
[   43.609798]  ? SYSC_read+0x360/0x360
[   43.613491]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.618658] RIP: 0033:0x7f22a3a83370
[   43.622347] RSP: 002b:00007ffd2d349e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   43.630045] RAX: ffffffffffffffda RBX: 0000000000000138 RCX: 00007f22a3a83370
[   43.637302] RDX: 0000000000000138 RSI: 00005612e7e29440 RDI: 0000000000000003
[   43.644548] RBP: 00005612e7e29440 R08: 00005612e7e27c30 R09: 00005612e787b820
[   43.651792] R10: 000000007f1c361a R11: 0000000000000246 R12: 00007ffd2d349efc
[   43.659038] R13: 0000000000000001 R14: 00005612e7e2f4a0 R15: 0000000000000000
[   43.666291] Code: 75 29 48 c7 c7 fd 92 7d 8a 31 c0 e8 9d 6a 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 82 6a 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 
[   43.685455] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801993be648
[   43.692541] ---[ end trace 4e7195b5673c0e84 ]---
[   43.697272] Kernel panic - not syncing: Fatal exception in interrupt
[   43.704158] Dumping ftrace buffer:
[   43.707675]    (ftrace buffer empty)
[   43.711360] Kernel Offset: disabled
[   43.714956] Rebooting in 86400 seconds..