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

Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts.
syzkaller login: [  179.264464] Not allocated shadow for addr ffff8801cac18000 (page ffffea000ac08900)
[  179.272284] Attempted to access 102 bytes
[  179.276486] ------------[ cut here ]------------
[  179.281267] kernel BUG at mm/kmsan/kmsan.c:1326!
[  179.286050] invalid opcode: 0000 [#1] SMP PTI
[  179.290554] Dumping ftrace buffer:
[  179.294081]    (ftrace buffer empty)
[  179.297947] Modules linked in:
[  179.301140] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0+ #82
[  179.307374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  179.316758] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0
[  179.322378] RSP: 0018:ffff88021fd0eed8 EFLAGS: 00010086
[  179.327751] RAX: 000000000000001d RBX: 0000000000000720 RCX: 0000000000000000
[  179.335039] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[  179.342445] RBP: ffff88021fd0eef0 R08: 0000000000000000 R09: 0000000000000001
[  179.349704] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cac18000
[  179.356985] R13: 0000000000000066 R14: 0000000000000001 R15: 0000000000000066
[  179.364264] FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[  179.372507] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  179.378416] CR2: 00007fed8da41fb0 CR3: 00000001ad258000 CR4: 00000000001406e0
[  179.385703] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  179.392994] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  179.400259] Call Trace:
[  179.402834]  <IRQ>
[  179.404989]  kmsan_internal_unpoison_shadow+0x5c/0xe0
[  179.410180]  kmsan_unpoison_shadow+0x66/0xb0
[  179.414592]  virtqueue_get_buf_ctx+0x742/0xa20
[  179.419201]  virtqueue_get_buf+0x72/0x90
[  179.423270]  start_xmit+0x276/0x2840
[  179.426982]  ? virtnet_close+0x2c0/0x2c0
[  179.431040]  dev_hard_start_xmit+0x5f1/0xc70
[  179.435492]  sch_direct_xmit+0x540/0x8f0
[  179.439576]  __qdisc_run+0x1785/0x3730
[  179.443478]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  179.448863]  __dev_queue_xmit+0x174a/0x2b60
[  179.453195]  dev_queue_xmit+0x4b/0x60
[  179.457014]  ip_finish_output2+0x1198/0x1380
[  179.461437]  ip_finish_output+0xcb0/0xff0
[  179.465597]  ip_output+0x502/0x5c0
[  179.469133]  ? ip_mc_finish_output+0x3b0/0x3b0
[  179.473715]  ? ip_finish_output+0xff0/0xff0
[  179.478050]  ip_queue_xmit+0x1fae/0x21c0
[  179.482129]  ? __ip_local_out+0x5b0/0x5b0
[  179.486291]  ? __msan_poison_alloca+0x15c/0x1d0
[  179.490974]  ? ip_output+0x5c0/0x5c0
[  179.494687]  tcp_transmit_skb+0x38be/0x51f0
[  179.499006]  tcp_send_ack+0x7e3/0x910
[  179.502813]  tcp_delack_timer_handler+0x5d0/0xac0
[  179.507648]  tcp_delack_timer+0x1be/0x360
[  179.511787]  ? call_timer_fn+0x7e/0x5a0
[  179.515766]  call_timer_fn+0x26a/0x5a0
[  179.519665]  ? tcp_write_timer+0x290/0x290
[  179.523903]  __run_timers+0xda7/0x11c0
[  179.527779]  ? tcp_write_timer+0x290/0x290
[  179.532029]  ? irq_exit+0x202/0x240
[  179.535659]  ? run_timer_softirq+0x14/0x70
[  179.539886]  ? timers_dead_cpu+0x1010/0x1010
[  179.544294]  run_timer_softirq+0x43/0x70
[  179.548374]  __do_softirq+0x56d/0x93d
[  179.552191]  irq_exit+0x202/0x240
[  179.555739]  exiting_irq+0xe/0x10
[  179.559208]  smp_apic_timer_interrupt+0x64/0x90
[  179.563887]  apic_timer_interrupt+0xf/0x20
[  179.568123]  </IRQ>
[  179.570397] RIP: 0010:default_idle+0x1fb/0x3c0
[  179.574994] RSP: 0018:ffff8801df67fdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12
[  179.582734] RAX: ffff880203eb5440 RBX: 0000000000000000 RCX: ffff880000000000
[  179.590036] RDX: ffff880203ab5440 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
[  179.597372] RBP: ffff8801df67fe28 R08: 0000000001080020 R09: 0000000000000002
[  179.604654] R10: 00000029bcf79000 R11: 0000000000000000 R12: 0000000000000000
[  179.611943] R13: ffff8801df5f3b00 R14: ffff8801df67fe8c R15: ffff8801df5f4418
[  179.619263]  ? __sched_text_end+0x1/0x1
[  179.623271]  arch_cpu_idle+0x20/0x30
[  179.627020]  do_idle+0x349/0x790
[  179.630418]  cpu_startup_entry+0x45/0x50
[  179.634501]  ? setup_APIC_timer+0x220/0x220
[  179.640002]  start_secondary+0x39d/0x470
[  179.644108]  secondary_startup_64+0xa5/0xb0
[  179.648736] 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 
[  179.667871] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff88021fd0eed8
[  179.674965] ---[ end trace 6699632dae5b189f ]---
[  179.679715] Kernel panic - not syncing: Fatal exception in interrupt
[  179.686685] Dumping ftrace buffer:
[  179.690231]    (ftrace buffer empty)
[  179.693942] Kernel Offset: disabled
[  179.697578] Rebooting in 86400 seconds..