[....] 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[   54.513181] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   55.525326] random: sshd: uninitialized urandom read (32 bytes read)
[   55.914471] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   57.546579] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.75' (ECDSA) to the list of known hosts.
[   63.339297] random: sshd: uninitialized urandom read (32 bytes read)
2018/09/20 17:30:27 fuzzer started
[   65.048983] random: cc1: uninitialized urandom read (8 bytes read)
2018/09/20 17:30:31 connecting to host at 10.128.0.26:33259
2018/09/20 17:30:31 checking revisions...
[   67.147973] ==================================================================
[   67.155388] BUG: KMSAN: uninit-value in kcov_open+0x4a/0xa0
[   67.161116] CPU: 1 PID: 4732 Comm: syz-fuzzer Not tainted 4.19.0-rc4+ #53
[   67.168051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.177391] Call Trace:
[   67.179990]  dump_stack+0x2f6/0x430
[   67.183627]  kmsan_report+0x183/0x2b0
[   67.187432]  kmsan_internal_check_memory+0x17e/0x1f0
[   67.192544]  kmsan_check_memory+0xb/0x10
[   67.196612]  kcov_open+0x4a/0xa0
[   67.199971]  ? kcov_mmap+0x120/0x120
[   67.203683]  open_proxy_open+0x545/0x5d0
[   67.207790]  ? debugfs_file_put+0x100/0x100
[   67.212113]  do_dentry_open+0xfb0/0x18b0
[   67.216173]  ? kmsan_memcpy_origins+0x111/0x1b0
[   67.220857]  vfs_open+0xaf/0xe0
[   67.224133]  path_openat+0x1845/0x6e50
[   67.228034]  ? kmsan_set_origin_inline+0x6b/0x120
[   67.233143]  do_filp_open+0x259/0x610
[   67.237047]  do_sys_open+0x630/0x940
[   67.240825]  __se_sys_openat+0xcb/0xe0
[   67.244723]  __x64_sys_openat+0x56/0x70
[   67.248741]  do_syscall_64+0xb8/0x100
[   67.252570]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   67.257762] RIP: 0033:0x47fcba
[   67.260961] Code: e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48
[   67.279853] RSP: 002b:000000c420175650 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
[   67.287560] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcba
[   67.294821] RDX: 0000000000080000 RSI: 000000c4200122a0 RDI: ffffffffffffff9c
[   67.302080] RBP: 000000c4201756d0 R08: 0000000000000000 R09: 0000000000000000
[   67.309338] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
[   67.316599] R13: 00000000000000f9 R14: 0000000000000011 R15: 0000000000000108
[   67.323870] 
[   67.325488] Local variable description: ----c.i.i.i.i@generic_permission
[   67.332306] Variable was created at:
[   67.336016]  generic_permission+0x4f/0xa90
[   67.340269]  inode_permission+0x11b/0x940
[   67.344403] 
[   67.346021] Byte 7 of 8 is uninitialized
[   67.350086] Memory access starts at ffff8801b049f810
[   67.355176] ==================================================================
[   67.362524] Disabling lock debugging due to kernel taint
[   67.367966] Kernel panic - not syncing: panic_on_warn set ...
[   67.367966] 
[   67.375356] CPU: 1 PID: 4732 Comm: syz-fuzzer Tainted: G    B             4.19.0-rc4+ #53
[   67.383688] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.393048] Call Trace:
[   67.395640]  dump_stack+0x2f6/0x430
[   67.399299]  panic+0x54c/0xaf7
[   67.402527]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   67.407980]  kmsan_report+0x2a8/0x2b0
[   67.411795]  kmsan_internal_check_memory+0x17e/0x1f0
[   67.416912]  kmsan_check_memory+0xb/0x10
[   67.420970]  kcov_open+0x4a/0xa0
[   67.424332]  ? kcov_mmap+0x120/0x120
[   67.428044]  open_proxy_open+0x545/0x5d0
[   67.432124]  ? debugfs_file_put+0x100/0x100
[   67.436444]  do_dentry_open+0xfb0/0x18b0
[   67.440501]  ? kmsan_memcpy_origins+0x111/0x1b0
[   67.445180]  vfs_open+0xaf/0xe0
[   67.448463]  path_openat+0x1845/0x6e50
[   67.452362]  ? kmsan_set_origin_inline+0x6b/0x120
[   67.457258]  do_filp_open+0x259/0x610
[   67.461117]  do_sys_open+0x630/0x940
[   67.464841]  __se_sys_openat+0xcb/0xe0
[   67.468749]  __x64_sys_openat+0x56/0x70
[   67.472753]  do_syscall_64+0xb8/0x100
[   67.476566]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   67.481765] RIP: 0033:0x47fcba
[   67.484991] Code: e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48
[   67.503989] RSP: 002b:000000c420175650 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
[   67.511691] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcba
[   67.518962] RDX: 0000000000080000 RSI: 000000c4200122a0 RDI: ffffffffffffff9c
[   67.526222] RBP: 000000c4201756d0 R08: 0000000000000000 R09: 0000000000000000
[   67.533485] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
[   67.540759] R13: 00000000000000f9 R14: 0000000000000011 R15: 0000000000000108
[   67.548367] Kernel Offset: disabled
[   67.552005] Rebooting in 86400 seconds..