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 '10.128.10.24' (ECDSA) to the list of known hosts.
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syzkaller login: [   32.743635] ==================================================================
[   32.751045] BUG: KMSAN: uninit-value in copy_page_to_iter+0x754/0x1b70
[   32.757688] CPU: 1 PID: 3627 Comm: blkid Not tainted 4.16.0+ #84
[   32.763803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.773131] Call Trace:
[   32.775697]  dump_stack+0x185/0x1d0
[   32.779302]  ? kmsan_internal_check_memory+0x155/0x1e0
[   32.784553]  kmsan_report+0x142/0x240
[   32.788330]  kmsan_internal_check_memory+0x174/0x1e0
[   32.793420]  kmsan_copy_to_user+0x69/0x160
[   32.797634]  copy_page_to_iter+0x754/0x1b70
[   32.801935]  generic_file_read_iter+0x2ee8/0x43f0
[   32.806762]  blkdev_read_iter+0x20d/0x280
[   32.810887]  ? blkdev_write_iter+0x5f0/0x5f0
[   32.815271]  __vfs_read+0x6fb/0x8e0
[   32.818879]  vfs_read+0x36c/0x6c0
[   32.822309]  SYSC_read+0x172/0x360
[   32.825825]  SyS_read+0x55/0x80
[   32.829080]  do_syscall_64+0x309/0x430
[   32.832964]  ? vfs_write+0x8d0/0x8d0
[   32.836654]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   32.841818] RIP: 0033:0x7eff14931310
[   32.845502] RSP: 002b:00007ffeed24b368 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   32.853195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007eff14931310
[   32.860439] RDX: 0000000000000400 RSI: 0000000001af1c58 RDI: 0000000000000003
[   32.867697] RBP: 0000000001af1c30 R08: 0000000000000028 R09: 0000000001680000
[   32.874943] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001af1030
[   32.882190] R13: 0000000000000400 R14: 0000000001af1080 R15: 0000000001af1c48
[   32.889433] 
[   32.891034] Uninit was stored to memory at:
[   32.895333]  kmsan_internal_chain_origin+0x12b/0x210
[   32.900411]  kmsan_memcpy_origins+0x11d/0x170
[   32.904882]  __msan_memcpy+0x19f/0x1f0
[   32.908742]  _copy_to_iter+0x852/0x28f0
[   32.912692]  copy_page_to_iter+0x383/0x1b70
[   32.916995]  shmem_file_read_iter+0x99f/0x1180
[   32.921557]  do_iter_readv_writev+0x7bb/0x970
[   32.926036]  do_iter_read+0x303/0xd70
[   32.929831]  vfs_iter_read+0x118/0x180
[   32.933780]  loop_queue_work+0x270e/0x3ef0
[   32.938011]  kthread_worker_fn+0x58f/0x900
[   32.942230]  loop_kthread_worker_fn+0x90/0xb0
[   32.946698]  kthread+0x539/0x720
[   32.950044]  ret_from_fork+0x35/0x40
[   32.953728] Uninit was created at:
[   32.957241]  kmsan_alloc_meta_for_pages+0x161/0x3a0
[   32.962231]  kmsan_alloc_page+0x82/0xe0
[   32.966179]  __alloc_pages_nodemask+0xf5b/0x5dc0
[   32.970907]  alloc_pages_vma+0xcc8/0x1800
[   32.975037]  shmem_alloc_and_acct_page+0x6d5/0x1000
[   32.980034]  shmem_getpage_gfp+0x35db/0x5770
[   32.984420]  shmem_file_read_iter+0x508/0x1180
[   32.988976]  do_iter_readv_writev+0x7bb/0x970
[   32.993448]  do_iter_read+0x303/0xd70
[   32.997223]  vfs_iter_read+0x118/0x180
[   33.001087]  loop_queue_work+0x270e/0x3ef0
[   33.005296]  kthread_worker_fn+0x58f/0x900
[   33.009516]  loop_kthread_worker_fn+0x90/0xb0
[   33.013983]  kthread+0x539/0x720
[   33.017328]  ret_from_fork+0x35/0x40
[   33.021015] 
[   33.022622] Bytes 344-1023 of 1024 are uninitialized
[   33.027693] ==================================================================
[   33.035025] Disabling lock debugging due to kernel taint
[   33.040453] Kernel panic - not syncing: panic_on_warn set ...
[   33.040453] 
[   33.047792] CPU: 1 PID: 3627 Comm: blkid Tainted: G    B            4.16.0+ #84
[   33.055208] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.064532] Call Trace:
[   33.067106]  dump_stack+0x185/0x1d0
[   33.070712]  panic+0x39d/0x940
[   33.073891]  ? kmsan_internal_check_memory+0x155/0x1e0
[   33.079143]  kmsan_report+0x238/0x240
[   33.082922]  kmsan_internal_check_memory+0x174/0x1e0
[   33.088002]  kmsan_copy_to_user+0x69/0x160
[   33.092325]  copy_page_to_iter+0x754/0x1b70
[   33.096627]  generic_file_read_iter+0x2ee8/0x43f0
[   33.101456]  blkdev_read_iter+0x20d/0x280
[   33.105581]  ? blkdev_write_iter+0x5f0/0x5f0
[   33.109965]  __vfs_read+0x6fb/0x8e0
[   33.113570]  vfs_read+0x36c/0x6c0
[   33.116999]  SYSC_read+0x172/0x360
[   33.120523]  SyS_read+0x55/0x80
[   33.123777]  do_syscall_64+0x309/0x430
[   33.127639]  ? vfs_write+0x8d0/0x8d0
[   33.131332]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   33.136496] RIP: 0033:0x7eff14931310
[   33.140181] RSP: 002b:00007ffeed24b368 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   33.147869] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007eff14931310
[   33.155111] RDX: 0000000000000400 RSI: 0000000001af1c58 RDI: 0000000000000003
[   33.162356] RBP: 0000000001af1c30 R08: 0000000000000028 R09: 0000000001680000
[   33.169600] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001af1030
[   33.176844] R13: 0000000000000400 R14: 0000000001af1080 R15: 0000000001af1c48
[   33.184539] Dumping ftrace buffer:
[   33.188061]    (ftrace buffer empty)
[   33.191745] Kernel Offset: disabled
[   33.195344] Rebooting in 86400 seconds..