[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.486390] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.261831] random: sshd: uninitialized urandom read (32 bytes read)
[   36.556855] random: sshd: uninitialized urandom read (32 bytes read)
[   37.956911] random: sshd: uninitialized urandom read (32 bytes read)
[   38.240438] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts.
[   43.722163] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/19 08:38:24 parsed 1 programs
[   44.964673] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/19 08:38:26 executed programs: 0
[   46.281147] IPVS: ftp: loaded support on port[0] = 21
[   48.898421] PANIC: double fault, error_code: 0x0
[   48.903237] CPU: 1 PID: 4997 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27
[   48.910416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.919777] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0
[   48.925386] Code: ff 48 01 cb e9 11 02 00 00 65 44 8b 3c 25 20 a1 02 00 48 b8 00 00 00 00 00 02 00 00 4c 01 e8 48 3d ff 0f ec 00 77 35 44 89 ff <e8> aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af 
[   48.944707] RSP: 0018:fffffe000003d000 EFLAGS: 00010093
[   48.950079] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e
[   48.957340] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001
[   48.964601] RBP: fffffe000003d030 R08: 0000000000000001 R09: 000000000072bea0
[   48.971872] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001
[   48.979151] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001
[   48.986415] FS:  000000000171e940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   48.994635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   49.000528] CR2: fffffe000003cff8 CR3: 00000001a6ba4000 CR4: 00000000001406e0
[   49.007889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   49.015161] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   49.022440] Call Trace:
[   49.025016]  <ENTRY_TRAMPOLINE>
[   49.028305]  kmsan_memmove_shadow+0x87/0xe0
[   49.032621]  __msan_memmove+0xb7/0x150
[   49.036504]  fixup_bad_iret+0x85/0x110
[   49.040387]  error_entry+0xe8/0x100
[   49.044003] RIP: 0000:          (null)
[   49.047881] Code: Bad RIP value.
[   49.051275] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   49.058989] RAX: 000000000072bec4 RBX: ffffffff8a400f48 RCX: 000000000000bf01
[   49.066266] RDX: 0000000000000246 RSI: 0000000000a3e930 RDI: 0000000000000000
[   49.073558] RBP: 000000000072bec4 R08: 0000000000000019 R09: 0000000000000002
[   49.080837] R10: 000000000072bea0 R11: 0000000000000001 R12: 0000000000000019
[   49.088111] R13: 0000000000000002 R14: 000000000072bea0 R15: 0000000000000001
[   49.095395]  ? general_protection+0x8/0x30
[   49.099626]  ? general_protection+0x8/0x30
[   49.103883]  </ENTRY_TRAMPOLINE>
[   49.107231] Kernel panic - not syncing: Machine halted.
[   49.112596] CPU: 1 PID: 4997 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27
[   49.119772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.129128] Call Trace:
[   49.131695]  <#DF>
[   49.133842]  dump_stack+0x185/0x1e0
[   49.137471]  panic+0x3d0/0x9b0
[   49.140676]  ? show_regs+0xcc/0x100
[   49.144298]  df_debug+0xa6/0xb0
[   49.147572]  do_double_fault+0x30f/0x420
[   49.151632]  double_fault+0x1e/0x30
[   49.155428] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0
[   49.161040] Code: ff 48 01 cb e9 11 02 00 00 65 44 8b 3c 25 20 a1 02 00 48 b8 00 00 00 00 00 02 00 00 4c 01 e8 48 3d ff 0f ec 00 77 35 44 89 ff <e8> aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af 
[   49.180247] RSP: 0018:fffffe000003d000 EFLAGS: 00010093
[   49.185604] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e
[   49.192863] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001
[   49.200141] RBP: fffffe000003d030 R08: 0000000000000001 R09: 000000000072bea0
[   49.207405] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001
[   49.214679] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001
[   49.221966]  ? general_protection+0x8/0x30
[   49.226223]  ? general_protection+0x8/0x30
[   49.230447]  </#DF>
[   49.232666]  <ENTRY_TRAMPOLINE>
[   49.235939]  kmsan_memmove_shadow+0x87/0xe0
[   49.240251]  __msan_memmove+0xb7/0x150
[   49.244136]  fixup_bad_iret+0x85/0x110
[   49.248039]  error_entry+0xe8/0x100
[   49.251656] RIP: 0000:          (null)
[   49.255522] Code: Bad RIP value.
[   49.258885] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   49.266591] RAX: 000000000072bec4 RBX: ffffffff8a400f48 RCX: 000000000000bf01
[   49.273862] RDX: 0000000000000246 RSI: 0000000000a3e930 RDI: 0000000000000000
[   49.281125] RBP: 000000000072bec4 R08: 0000000000000019 R09: 0000000000000002
[   49.288408] R10: 000000000072bea0 R11: 0000000000000001 R12: 0000000000000019
[   49.295668] R13: 0000000000000002 R14: 000000000072bea0 R15: 0000000000000001
[   49.302954]  ? general_protection+0x8/0x30
[   49.307193]  ? general_protection+0x8/0x30
[   49.311417]  </ENTRY_TRAMPOLINE>
[   49.315278] Dumping ftrace buffer:
[   49.318810]    (ftrace buffer empty)
[   49.322501] Kernel Offset: disabled
[   49.326109] Rebooting in 86400 seconds..