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 '10.128.10.7' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   43.113477] ==================================================================
[   43.120861] BUG: KMSAN: uninit-value in vcs_read+0x18ba/0x1cc0
[   43.126810] CPU: 0 PID: 4513 Comm: syz-executor273 Not tainted 4.16.0+ #87
[   43.133801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.143145] Call Trace:
[   43.145716]  dump_stack+0x185/0x1d0
[   43.149333]  ? kmsan_internal_check_memory+0x155/0x1e0
[   43.154586]  kmsan_report+0x142/0x240
[   43.158366]  kmsan_internal_check_memory+0x174/0x1e0
[   43.163446]  kmsan_copy_to_user+0x69/0x160
[   43.167658]  vcs_read+0x18ba/0x1cc0
[   43.171270]  do_iter_read+0x880/0xd70
[   43.175055]  ? vcs_lseek+0x470/0x470
[   43.178744]  do_preadv+0x3a1/0x580
[   43.182269]  ? syscall_return_slowpath+0xe9/0x700
[   43.187089]  SYSC_preadv+0xc6/0xe0
[   43.190609]  SyS_preadv+0x77/0xa0
[   43.194050]  do_syscall_64+0x309/0x430
[   43.197916]  ? SYSC_writev+0xb0/0xb0
[   43.201618]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.206784] RIP: 0033:0x4491e9
[   43.209950] RSP: 002b:00007f7f4909bda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
[   43.217718] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004491e9
[   43.224963] RDX: 0000000000000002 RSI: 0000000020000540 RDI: 0000000000000003
[   43.232209] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   43.239454] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac20
[   43.246699] R13: 7363762f7665642f R14: 00007f7f4909c9c0 R15: 0000000000000001
[   43.253945] 
[   43.255544] Uninit was stored to memory at:
[   43.259843]  kmsan_internal_chain_origin+0x12b/0x210
[   43.264919]  __msan_chain_origin+0x69/0xc0
[   43.269128]  vcs_read+0x17a3/0x1cc0
[   43.272728]  do_iter_read+0x880/0xd70
[   43.276588]  do_preadv+0x3a1/0x580
[   43.280102]  SYSC_preadv+0xc6/0xe0
[   43.283618]  SyS_preadv+0x77/0xa0
[   43.287049]  do_syscall_64+0x309/0x430
[   43.290912]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.296077] Uninit was created at:
[   43.299592]  kmsan_internal_poison_shadow+0xb8/0x1b0
[   43.304667]  kmsan_kmalloc+0x94/0x100
[   43.308441]  __kmalloc+0x23c/0x350
[   43.311955]  vc_allocate+0x438/0x800
[   43.315641]  con_install+0x8c/0x640
[   43.319241]  tty_init_dev+0x1b0/0x1020
[   43.323101]  tty_open+0x15e9/0x2ea0
[   43.326703]  chrdev_open+0xc20/0xd90
[   43.330391]  do_dentry_open+0xcc6/0x1430
[   43.334425]  vfs_open+0x1b7/0x2e0
[   43.337852]  path_openat+0x481d/0x6610
[   43.341718]  do_filp_open+0x261/0x640
[   43.345500]  do_sys_open+0x624/0x960
[   43.349192]  SYSC_open+0xab/0xc0
[   43.352532]  SyS_open+0x54/0x80
[   43.355785]  do_syscall_64+0x309/0x430
[   43.359645]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.364802] 
[   43.366411] Bytes 4-8 of 9 are uninitialized
[   43.370793] ==================================================================
[   43.378122] Disabling lock debugging due to kernel taint
[   43.383543] Kernel panic - not syncing: panic_on_warn set ...
[   43.383543] 
[   43.390887] CPU: 0 PID: 4513 Comm: syz-executor273 Tainted: G    B            4.16.0+ #87
[   43.399175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.408503] Call Trace:
[   43.411069]  dump_stack+0x185/0x1d0
[   43.414673]  panic+0x39d/0x940
[   43.417849]  ? kmsan_internal_check_memory+0x155/0x1e0
[   43.423100]  kmsan_report+0x238/0x240
[   43.426875]  kmsan_internal_check_memory+0x174/0x1e0
[   43.431963]  kmsan_copy_to_user+0x69/0x160
[   43.436176]  vcs_read+0x18ba/0x1cc0
[   43.439795]  do_iter_read+0x880/0xd70
[   43.443573]  ? vcs_lseek+0x470/0x470
[   43.447268]  do_preadv+0x3a1/0x580
[   43.450786]  ? syscall_return_slowpath+0xe9/0x700
[   43.455613]  SYSC_preadv+0xc6/0xe0
[   43.459131]  SyS_preadv+0x77/0xa0
[   43.462563]  do_syscall_64+0x309/0x430
[   43.466427]  ? SYSC_writev+0xb0/0xb0
[   43.470125]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.475288] RIP: 0033:0x4491e9
[   43.478452] RSP: 002b:00007f7f4909bda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
[   43.486133] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004491e9
[   43.493377] RDX: 0000000000000002 RSI: 0000000020000540 RDI: 0000000000000003
[   43.500619] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   43.507868] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac20
[   43.515114] R13: 7363762f7665642f R14: 00007f7f4909c9c0 R15: 0000000000000001
[   43.522881] Dumping ftrace buffer:
[   43.526393]    (ftrace buffer empty)
[   43.530078] Kernel Offset: disabled
[   43.533677] Rebooting in 86400 seconds..