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 '10.128.10.26' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.981212] ==================================================================
[   47.988618] BUG: KMSAN: uninit-value in copy_page_to_iter+0x754/0x1b70
[   47.995280] CPU: 1 PID: 3582 Comm: blkid Not tainted 4.16.0+ #84
[   48.001402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.010742] Call Trace:
[   48.013326]  dump_stack+0x185/0x1d0
[   48.016958]  ? kmsan_internal_check_memory+0x155/0x1e0
[   48.022232]  kmsan_report+0x142/0x240
[   48.026042]  kmsan_internal_check_memory+0x174/0x1e0
[   48.031149]  kmsan_copy_to_user+0x69/0x160
[   48.035389]  copy_page_to_iter+0x754/0x1b70
[   48.039738]  generic_file_read_iter+0x2ee8/0x43f0
[   48.044637]  blkdev_read_iter+0x20d/0x280
[   48.048794]  ? blkdev_write_iter+0x5f0/0x5f0
[   48.053199]  __vfs_read+0x6fb/0x8e0
[   48.056849]  vfs_read+0x36c/0x6c0
[   48.060318]  SYSC_read+0x172/0x360
[   48.063875]  SyS_read+0x55/0x80
[   48.067154]  do_syscall_64+0x309/0x430
[   48.071054]  ? vfs_write+0x8d0/0x8d0
[   48.074773]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   48.079950] RIP: 0033:0x7f5bc1390310
[   48.083648] RSP: 002b:00007fffe1ccb538 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   48.091347] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5bc1390310
[   48.098598] RDX: 0000000000000400 RSI: 0000000001ca9c58 RDI: 0000000000000003
[   48.105852] RBP: 0000000001ca9c30 R08: 0000000000000028 R09: 0000000001680000
[   48.113107] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001ca9030
[   48.120368] R13: 0000000000000400 R14: 0000000001ca9080 R15: 0000000001ca9c48
[   48.127622] 
[   48.129227] Uninit was stored to memory at:
[   48.133546]  kmsan_internal_chain_origin+0x12b/0x210
[   48.138635]  kmsan_memcpy_origins+0x11d/0x170
[   48.143129]  __msan_memcpy+0x19f/0x1f0
[   48.147012]  iov_iter_copy_from_user_atomic+0xb04/0x17d0
[   48.152458]  generic_perform_write+0x4c6/0x990
[   48.157032]  __generic_file_write_iter+0x43b/0x990
[   48.161956]  blkdev_write_iter+0x3a8/0x5f0
[   48.166180]  do_iter_readv_writev+0x7bb/0x970
[   48.170663]  do_iter_write+0x30d/0xd40
[   48.174540]  vfs_iter_write+0x118/0x180
[   48.178508]  iter_file_splice_write+0xbc3/0x1710
[   48.183255]  direct_splice_actor+0x19b/0x200
[   48.187655]  splice_direct_to_actor+0x764/0x1040
[   48.192398]  do_splice_direct+0x335/0x540
[   48.196548]  do_sendfile+0x1067/0x1e40
[   48.200422]  SYSC_sendfile64+0x1b3/0x300
[   48.204483]  SyS_sendfile64+0x64/0x90
[   48.208270]  do_syscall_64+0x309/0x430
[   48.212144]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   48.217315] Uninit was created at:
[   48.220838]  kmsan_alloc_meta_for_pages+0x161/0x3a0
[   48.225836]  kmsan_alloc_page+0x82/0xe0
[   48.229793]  __alloc_pages_nodemask+0xf5b/0x5dc0
[   48.234537]  alloc_pages_vma+0xcc8/0x1800
[   48.238677]  shmem_alloc_and_acct_page+0x6d5/0x1000
[   48.243684]  shmem_getpage_gfp+0x35db/0x5770
[   48.248081]  shmem_file_read_iter+0x508/0x1180
[   48.252649]  generic_file_splice_read+0x4e8/0x830
[   48.257483]  splice_direct_to_actor+0x4c6/0x1040
[   48.262244]  do_splice_direct+0x335/0x540
[   48.266394]  do_sendfile+0x1067/0x1e40
[   48.270273]  SYSC_sendfile64+0x1b3/0x300
[   48.274324]  SyS_sendfile64+0x64/0x90
[   48.278117]  do_syscall_64+0x309/0x430
[   48.281998]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   48.287172] 
[   48.288787] Bytes 0-1023 of 1024 are uninitialized
[   48.293697] ==================================================================
[   48.301037] Disabling lock debugging due to kernel taint
[   48.306473] Kernel panic - not syncing: panic_on_warn set ...
[   48.306473] 
[   48.313841] CPU: 1 PID: 3582 Comm: blkid Tainted: G    B            4.16.0+ #84
[   48.321273] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.330623] Call Trace:
[   48.333207]  dump_stack+0x185/0x1d0
[   48.336836]  panic+0x39d/0x940
[   48.340104]  ? kmsan_internal_check_memory+0x155/0x1e0
[   48.345373]  kmsan_report+0x238/0x240
[   48.349175]  kmsan_internal_check_memory+0x174/0x1e0
[   48.354284]  kmsan_copy_to_user+0x69/0x160
[   48.358527]  copy_page_to_iter+0x754/0x1b70
[   48.362876]  generic_file_read_iter+0x2ee8/0x43f0
[   48.367759]  blkdev_read_iter+0x20d/0x280
[   48.371910]  ? blkdev_write_iter+0x5f0/0x5f0
[   48.376316]  __vfs_read+0x6fb/0x8e0
[   48.379973]  vfs_read+0x36c/0x6c0
[   48.383440]  SYSC_read+0x172/0x360
[   48.386993]  SyS_read+0x55/0x80
[   48.390273]  do_syscall_64+0x309/0x430
[   48.394167]  ? vfs_write+0x8d0/0x8d0
[   48.397886]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   48.403064] RIP: 0033:0x7f5bc1390310
[   48.406765] RSP: 002b:00007fffe1ccb538 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   48.414468] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5bc1390310
[   48.421726] RDX: 0000000000000400 RSI: 0000000001ca9c58 RDI: 0000000000000003
[   48.428983] RBP: 0000000001ca9c30 R08: 0000000000000028 R09: 0000000001680000
[   48.436248] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001ca9030
[   48.443518] R13: 0000000000000400 R14: 0000000001ca9080 R15: 0000000001ca9c48
[   48.453022] Dumping ftrace buffer:
[   48.456542]    (ftrace buffer empty)
[   48.460227] Kernel Offset: disabled
[   48.463828] Rebooting in 86400 seconds..