[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.902147] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   38.403776] random: sshd: uninitialized urandom read (32 bytes read)
[   38.812448] random: sshd: uninitialized urandom read (32 bytes read)
[   40.225699] random: sshd: uninitialized urandom read (32 bytes read)
[   40.462986] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts.
[   45.987816] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/16 07:44:25 parsed 1 programs
[   47.294009] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/16 07:44:27 executed programs: 0
[   48.837316] IPVS: ftp: loaded support on port[0] = 21
[   50.257465] PANIC: double fault, error_code: 0x0
[   50.262285] CPU: 1 PID: 4706 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27
[   50.269471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.278833] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0
[   50.284438] 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 
[   50.303592] RSP: 0018:fffffe000003d000 EFLAGS: 00010093
[   50.308939] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e
[   50.316201] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001
[   50.323455] RBP: fffffe000003d030 R08: 0000000000000001 R09: 00000000004d3ae0
[   50.330727] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001
[   50.337977] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001
[   50.345242] FS:  00000000016b0940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   50.353450] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.359315] CR2: fffffe000003cff8 CR3: 0000000199c46000 CR4: 00000000001406e0
[   50.366568] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.373819] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.381075] Call Trace:
[   50.383644]  <ENTRY_TRAMPOLINE>
[   50.386916]  kmsan_memmove_shadow+0x87/0xe0
[   50.391223]  __msan_memmove+0xb7/0x150
[   50.395095]  fixup_bad_iret+0x85/0x110
[   50.398968]  error_entry+0xe8/0x100
[   50.402577] RIP: 0000:0x419
[   50.405488] Code: Bad RIP value.
[   50.408845] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   50.416536] RAX: 0000000020000700 RBX: ffffffff8a400f48 RCX: 0000000000000419
[   50.423789] RDX: 0000000000000246 RSI: 0000000000000419 RDI: 0000000000000000
[   50.431056] RBP: 0000000020000700 R08: 00000000ffffffff R09: 00000000004c20a6
[   50.438310] R10: 00000000004d3ae0 R11: 0000000000000001 R12: 00000000ffffffff
[   50.445561] R13: 00000000004c20a6 R14: 00000000004d3ae0 R15: 0000000000000001
[   50.452842]  ? general_protection+0x8/0x30
[   50.457072]  ? general_protection+0x8/0x30
[   50.461297]  </ENTRY_TRAMPOLINE>
[   50.464640] Kernel panic - not syncing: Machine halted.
[   50.469997] CPU: 1 PID: 4706 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27
[   50.477171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.486505] Call Trace:
[   50.489072]  <#DF>
[   50.491218]  dump_stack+0x185/0x1e0
[   50.494830]  panic+0x3d0/0x9b0
[   50.498027]  ? show_regs+0xcc/0x100
[   50.501664]  df_debug+0xa6/0xb0
[   50.504931]  do_double_fault+0x30f/0x420
[   50.508979]  double_fault+0x1e/0x30
[   50.512599] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0
[   50.518197] 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 
[   50.537347] RSP: 0018:fffffe000003d000 EFLAGS: 00010093
[   50.542707] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e
[   50.549958] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001
[   50.557209] RBP: fffffe000003d030 R08: 0000000000000001 R09: 00000000004d3ae0
[   50.564460] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001
[   50.571711] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001
[   50.579156]  ? general_protection+0x8/0x30
[   50.583384]  ? general_protection+0x8/0x30
[   50.587602]  </#DF>
[   50.589826]  <ENTRY_TRAMPOLINE>
[   50.593102]  kmsan_memmove_shadow+0x87/0xe0
[   50.597415]  __msan_memmove+0xb7/0x150
[   50.601290]  fixup_bad_iret+0x85/0x110
[   50.605162]  error_entry+0xe8/0x100
[   50.608767] RIP: 0000:0x419
[   50.611677] Code: Bad RIP value.
[   50.615039] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   50.622734] RAX: 0000000020000700 RBX: ffffffff8a400f48 RCX: 0000000000000419
[   50.629985] RDX: 0000000000000246 RSI: 0000000000000419 RDI: 0000000000000000
[   50.637249] RBP: 0000000020000700 R08: 00000000ffffffff R09: 00000000004c20a6
[   50.644500] R10: 00000000004d3ae0 R11: 0000000000000001 R12: 00000000ffffffff
[   50.651749] R13: 00000000004c20a6 R14: 00000000004d3ae0 R15: 0000000000000001
[   50.659012]  ? general_protection+0x8/0x30
[   50.663243]  ? general_protection+0x8/0x30
[   50.667470]  </ENTRY_TRAMPOLINE>
[   50.671338] Dumping ftrace buffer:
[   50.674864]    (ftrace buffer empty)
[   50.678554] Kernel Offset: disabled
[   50.682173] Rebooting in 86400 seconds..