[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.241005] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.855884] random: sshd: uninitialized urandom read (32 bytes read)
[   38.229098] random: sshd: uninitialized urandom read (32 bytes read)
[   39.640194] random: sshd: uninitialized urandom read (32 bytes read)
[   41.067395] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts.
[   46.568685] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/18 09:10:25 parsed 1 programs
[   47.890854] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/18 09:10:27 executed programs: 0
[   49.608851] IPVS: ftp: loaded support on port[0] = 21
[   49.657370] IPVS: ftp: loaded support on port[0] = 21
[   49.666640] IPVS: ftp: loaded support on port[0] = 21
[   49.677306] IPVS: ftp: loaded support on port[0] = 21
[   49.685892] IPVS: ftp: loaded support on port[0] = 21
[   49.693408] IPVS: ftp: loaded support on port[0] = 21
[   49.709775] IPVS: ftp: loaded support on port[0] = 21
[   49.726909] IPVS: ftp: loaded support on port[0] = 21
2018/07/18 09:10:32 executed programs: 78
[   55.848362] ==================================================================
[   55.855802] BUG: KMSAN: kernel-infoleak in copy_page_to_iter+0x752/0x1b70
[   55.862860] CPU: 0 PID: 5243 Comm: blkid Not tainted 4.18.0-rc4+ #27
[   55.869373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.878734] Call Trace:
[   55.881346]  dump_stack+0x185/0x1e0
[   55.884987]  kmsan_report+0x195/0x2c0
[   55.888806]  kmsan_internal_check_memory+0x18e/0x210
[   55.893936]  kmsan_copy_to_user+0x83/0xe0
[   55.898093]  copy_page_to_iter+0x752/0x1b70
[   55.902446]  generic_file_read_iter+0x2f9b/0x45e0
[   55.907337]  blkdev_read_iter+0x20d/0x280
[   55.911504]  ? blkdev_write_iter+0x680/0x680
[   55.915921]  __vfs_read+0x827/0xb40
[   55.919581]  vfs_read+0x36c/0x6b0
[   55.923176]  __x64_sys_read+0x1cf/0x400
[   55.927176]  ? ksys_read+0x380/0x380
[   55.930899]  do_syscall_64+0x15b/0x230
[   55.934808]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   55.940006] RIP: 0033:0x7fbd3bfd3310
[   55.943718] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 
[   55.963057] RSP: 002b:00007fff4929a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   55.970787] RAX: ffffffffffffffda RBX: 000000000006d000 RCX: 00007fbd3bfd3310
[   55.978073] RDX: 0000000000000029 RSI: 0000000000727a08 RDI: 0000000000000003
[   55.985366] RBP: 00000000007279e0 R08: 0000000000000058 R09: 0101010101010101
[   55.992651] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000721030
[   55.999936] R13: 0000000000000029 R14: 0000000000721080 R15: 00000000007279f8
[   56.007225] 
[   56.008882] Uninit was created at:
[   56.012460]  kmsan_internal_alloc_meta_for_pages+0x157/0x730
[   56.018278]  kmsan_alloc_page+0x80/0xe0
[   56.022268]  __alloc_pages_nodemask+0x105b/0x6320
[   56.027141]  alloc_pages_current+0x6b1/0x970
[   56.031561]  __page_cache_alloc+0x95/0x320
[   56.035811]  generic_file_read_iter+0x230f/0x45e0
[   56.040664]  blkdev_read_iter+0x20d/0x280
[   56.044823]  __vfs_read+0x827/0xb40
[   56.048460]  vfs_read+0x36c/0x6b0
[   56.051925]  __x64_sys_read+0x1cf/0x400
[   56.055908]  do_syscall_64+0x15b/0x230
[   56.059805]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   56.064985] 
[   56.066636] Bytes 0-40 of 41 are uninitialized
[   56.071218] Memory access starts at ffff8801ad6a8000
[   56.076319] ==================================================================
[   56.083681] Disabling lock debugging due to kernel taint
[   56.089142] Kernel panic - not syncing: panic_on_warn set ...
[   56.089142] 
[   56.096533] CPU: 0 PID: 5243 Comm: blkid Tainted: G    B             4.18.0-rc4+ #27
[   56.104422] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.113786] Call Trace:
[   56.116392]  dump_stack+0x185/0x1e0
[   56.120038]  panic+0x3d0/0x9b0
[   56.123266]  kmsan_report+0x2bf/0x2c0
[   56.127085]  kmsan_internal_check_memory+0x18e/0x210
[   56.132214]  kmsan_copy_to_user+0x83/0xe0
[   56.136379]  copy_page_to_iter+0x752/0x1b70
[   56.140737]  generic_file_read_iter+0x2f9b/0x45e0
[   56.145624]  blkdev_read_iter+0x20d/0x280
[   56.149813]  ? blkdev_write_iter+0x680/0x680
[   56.154253]  __vfs_read+0x827/0xb40
[   56.157911]  vfs_read+0x36c/0x6b0
[   56.161387]  __x64_sys_read+0x1cf/0x400
[   56.165384]  ? ksys_read+0x380/0x380
[   56.169114]  do_syscall_64+0x15b/0x230
[   56.173021]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   56.178221] RIP: 0033:0x7fbd3bfd3310
[   56.181932] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 
[   56.201458] RSP: 002b:00007fff4929a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[   56.209187] RAX: ffffffffffffffda RBX: 000000000006d000 RCX: 00007fbd3bfd3310
[   56.216468] RDX: 0000000000000029 RSI: 0000000000727a08 RDI: 0000000000000003
[   56.223749] RBP: 00000000007279e0 R08: 0000000000000058 R09: 0101010101010101
[   56.231029] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000721030
[   56.238323] R13: 0000000000000029 R14: 0000000000721080 R15: 00000000007279f8
[   56.246126] Dumping ftrace buffer:
[   56.249662]    (ftrace buffer empty)
[   56.253353] Kernel Offset: disabled
[   56.256960] Rebooting in 86400 seconds..