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 '10.128.10.52' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   52.655831] ==================================================================
[   52.663255] BUG: KMSAN: uninit-value in _copy_to_iter+0x46d/0x28f0
[   52.669557] CPU: 1 PID: 4516 Comm: syz-executor879 Not tainted 4.16.0+ #87
[   52.676892] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.686241] Call Trace:
[   52.688809]  dump_stack+0x185/0x1d0
[   52.692638]  ? kmsan_internal_check_memory+0x116/0x1e0
[   52.697892]  kmsan_report+0x142/0x240
[   52.701671]  kmsan_internal_check_memory+0x135/0x1e0
[   52.706769]  kmsan_copy_to_user+0x69/0x160
[   52.711076]  ? _copy_to_iter+0x95/0x28f0
[   52.715234]  _copy_to_iter+0x46d/0x28f0
[   52.719191]  ? finish_wait+0x10a/0x3e0
[   52.723075]  vhost_chr_read_iter+0x7ac/0xc50
[   52.727489]  ? init_wait_entry+0x1a0/0x1a0
[   52.731813]  vhost_net_chr_read_iter+0xf6/0x130
[   52.736474]  ? vhost_net_exit+0x30/0x30
[   52.740446]  aio_read+0x5c1/0x6f0
[   52.743883]  ? __msan_metadata_ptr_for_load_1+0x10/0x20
[   52.749514]  ? fget+0x41b/0x460
[   52.752861]  do_io_submit+0x1bb4/0x2f60
[   52.756813]  ? kmsan_set_origin_inline+0x6b/0x120
[   52.761905]  SYSC_io_submit+0x98/0xb0
[   52.765781]  SyS_io_submit+0x56/0x80
[   52.769481]  do_syscall_64+0x309/0x430
[   52.773377]  ? SYSC_io_destroy+0x390/0x390
[   52.777768]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   52.782936] RIP: 0033:0x4457b9
[   52.786189] RSP: 002b:00007ff9343e4da8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d1
[   52.793871] RAX: ffffffffffffffda RBX: 00000000006dac44 RCX: 00000000004457b9
[   52.801118] RDX: 00000000200001c0 RSI: 0000000000000001 RDI: 00007ff93439a000
[   52.808374] RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000
[   52.815629] R10: 0000000000000000 R11: 0000000000000293 R12: 901aeeff3a98f9ab
[   52.822963] R13: 98c94b26f489688e R14: ae1b2dfa3c87200a R15: 0000000000000001
[   52.830868] 
[   52.832474] Uninit was created at:
[   52.836351]  kmsan_internal_poison_shadow+0xb8/0x1b0
[   52.841516]  kmsan_kmalloc+0x94/0x100
[   52.845294]  __kmalloc+0x23c/0x350
[   52.848968]  translate_desc+0xbef/0x1120
[   52.853105]  vhost_update_used_flags+0x469/0x8d0
[   52.858119]  vhost_vq_init_access+0x173/0xa20
[   52.862603]  vhost_net_ioctl+0x22b0/0x3480
[   52.866815]  do_vfs_ioctl+0xaf0/0x2440
[   52.870689]  SYSC_ioctl+0x1d2/0x260
[   52.874827]  SyS_ioctl+0x54/0x80
[   52.878209]  do_syscall_64+0x309/0x430
[   52.882699]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   52.888122] 
[   52.889739] Bytes 4-7 of 72 are uninitialized
[   52.894842] ==================================================================
[   52.902264] Disabling lock debugging due to kernel taint
[   52.907691] Kernel panic - not syncing: panic_on_warn set ...
[   52.907691] 
[   52.915033] CPU: 1 PID: 4516 Comm: syz-executor879 Tainted: G    B            4.16.0+ #87
[   52.923330] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.932669] Call Trace:
[   52.935254]  dump_stack+0x185/0x1d0
[   52.939463]  panic+0x39d/0x940
[   52.942643]  ? kmsan_internal_check_memory+0x116/0x1e0
[   52.947895]  kmsan_report+0x238/0x240
[   52.951681]  kmsan_internal_check_memory+0x135/0x1e0
[   52.956759]  kmsan_copy_to_user+0x69/0x160
[   52.960972]  ? _copy_to_iter+0x95/0x28f0
[   52.965013]  _copy_to_iter+0x46d/0x28f0
[   52.968963]  ? finish_wait+0x10a/0x3e0
[   52.972835]  vhost_chr_read_iter+0x7ac/0xc50
[   52.977397]  ? init_wait_entry+0x1a0/0x1a0
[   52.981612]  vhost_net_chr_read_iter+0xf6/0x130
[   52.986487]  ? vhost_net_exit+0x30/0x30
[   52.991154]  aio_read+0x5c1/0x6f0
[   52.994599]  ? __msan_metadata_ptr_for_load_1+0x10/0x20
[   53.001611]  ? fget+0x41b/0x460
[   53.005141]  do_io_submit+0x1bb4/0x2f60
[   53.009135]  ? kmsan_set_origin_inline+0x6b/0x120
[   53.014006]  SYSC_io_submit+0x98/0xb0
[   53.017790]  SyS_io_submit+0x56/0x80
[   53.021583]  do_syscall_64+0x309/0x430
[   53.025583]  ? SYSC_io_destroy+0x390/0x390
[   53.029860]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   53.035128] RIP: 0033:0x4457b9
[   53.038479] RSP: 002b:00007ff9343e4da8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d1
[   53.046175] RAX: ffffffffffffffda RBX: 00000000006dac44 RCX: 00000000004457b9
[   53.053437] RDX: 00000000200001c0 RSI: 0000000000000001 RDI: 00007ff93439a000
[   53.060801] RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000
[   53.068331] R10: 0000000000000000 R11: 0000000000000293 R12: 901aeeff3a98f9ab
[   53.075850] R13: 98c94b26f489688e R14: ae1b2dfa3c87200a R15: 0000000000000001
[   53.083628] Dumping ftrace buffer:
[   53.087142]    (ftrace buffer empty)
[   53.090828] Kernel Offset: disabled
[   53.094435] Rebooting in 86400 seconds..