[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   39.126150] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   40.641900] random: sshd: uninitialized urandom read (32 bytes read)
[   40.987340] random: sshd: uninitialized urandom read (32 bytes read)
[   41.982356] random: sshd: uninitialized urandom read (32 bytes read)
[   42.268328] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts.
[   48.060738] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   48.193364] PANIC: double fault, error_code: 0x0
[   48.198181] CPU: 0 PID: 4740 Comm: syz-executor347 Not tainted 4.19.0-rc1+ #40
[   48.205561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.214915] RIP: 0010:get_cpu_entry_area+0x0/0x30
[   48.219750] Code: a4 00 45 85 e4 79 ad e9 61 ff ff ff 49 89 d6 44 89 ff e8 93 82 a4 00 89 c0 48 89 c1 48 c1 e1 20 48 09 c1 49 89 0e eb a0 90 90 <55> 48 89 e5 53 89 fb e8 74 91 49 00 48 63 c3 48 69 c8 00 b0 03 00
[   48.238671] RSP: 0018:fffffe0000002000 EFLAGS: 00010093
[   48.244037] RAX: 0000000000002150 RBX: 0000000000000088 RCX: 000000000000002e
[   48.251319] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000000
[   48.258577] RBP: fffffe0000002038 R08: 0000000000000000 R09: 00000000004012e0
[   48.265838] R10: ffffffff89000f48 R11: ffffffff89000f48 R12: 0000000000000001
[   48.273098] R13: fffffe0000002150 R14: 0000000000000001 R15: 0000000000000000
[   48.280360] FS:  0000000002524940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[   48.288573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.294445] CR2: fffffe0000001ff8 CR3: 00000001a97e4000 CR4: 00000000001406f0
[   48.301704] Call Trace:
[   48.304274]  <ENTRY_TRAMPOLINE>
[   48.307564]  ? kmsan_get_shadow_address+0x1b6/0x3d0
[   48.312594]  kmsan_memmove_shadow+0x87/0xe0
[   48.316961]  __msan_memmove+0xaa/0x130
[   48.320873]  fixup_bad_iret+0x85/0x110
[   48.324784]  error_entry+0xe6/0xf0
[   48.328324] RIP: 0000:          (null)
[   48.332208] Code: Bad RIP value.
[   48.335563] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   48.343268] RAX: 0000000000000000 RBX: ffffffff89000f48 RCX: 0000000000000000
[   48.350527] RDX: 0000000000000000 RSI: 0000006e0000005b RDI: 0000000000000000
[   48.357795] RBP: 0000000000000000 R08: 00000000004009ae R09: 0000000044000004
[   48.365081] R10: 00000000004012e0 R11: 0000000000000000 R12: 00000000004009ae
[   48.372358] R13: 0000000044000004 R14: 00000000004012e0 R15: 0000000000000000
[   48.379636]  ? general_protection+0x8/0x30
[   48.383868]  ? general_protection+0x8/0x30
[   48.388101]  </ENTRY_TRAMPOLINE>
[   48.391459] Kernel panic - not syncing: Machine halted.
[   48.396834] CPU: 0 PID: 4740 Comm: syz-executor347 Not tainted 4.19.0-rc1+ #40
[   48.404182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.413521] Call Trace:
[   48.416096]  <#DF>
[   48.418240]  dump_stack+0x14b/0x190
[   48.421875]  panic+0x35d/0x8cb
[   48.425149]  ? show_regs+0xcc/0x100
[   48.428787]  df_debug+0xa6/0xb0
[   48.432080]  do_double_fault+0x302/0x410
[   48.436146]  double_fault+0x1e/0x30
[   48.439765] RIP: 0010:get_cpu_entry_area+0x0/0x30
[   48.444610] Code: a4 00 45 85 e4 79 ad e9 61 ff ff ff 49 89 d6 44 89 ff e8 93 82 a4 00 89 c0 48 89 c1 48 c1 e1 20 48 09 c1 49 89 0e eb a0 90 90 <55> 48 89 e5 53 89 fb e8 74 91 49 00 48 63 c3 48 69 c8 00 b0 03 00
[   48.463502] RSP: 0018:fffffe0000002000 EFLAGS: 00010093
[   48.468856] RAX: 0000000000002150 RBX: 0000000000000088 RCX: 000000000000002e
[   48.476117] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000000
[   48.483377] RBP: fffffe0000002038 R08: 0000000000000000 R09: 00000000004012e0
[   48.490637] R10: ffffffff89000f48 R11: ffffffff89000f48 R12: 0000000000000001
[   48.497896] R13: fffffe0000002150 R14: 0000000000000001 R15: 0000000000000000
[   48.505173]  ? general_protection+0x8/0x30
[   48.509400]  ? general_protection+0x8/0x30
[   48.513635]  </#DF>
[   48.515877]  <ENTRY_TRAMPOLINE>
[   48.519152]  ? kmsan_get_shadow_address+0x1b6/0x3d0
[   48.524167]  kmsan_memmove_shadow+0x87/0xe0
[   48.528485]  __msan_memmove+0xaa/0x130
[   48.532372]  fixup_bad_iret+0x85/0x110
[   48.536256]  error_entry+0xe6/0xf0
[   48.539789] RIP: 0000:          (null)
[   48.543674] Code: Bad RIP value.
[   48.547069] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[   48.554788] RAX: 0000000000000000 RBX: ffffffff89000f48 RCX: 0000000000000000
[   48.562065] RDX: 0000000000000000 RSI: 0000006e0000005b RDI: 0000000000000000
[   48.569332] RBP: 0000000000000000 R08: 00000000004009ae R09: 0000000044000004
[   48.576607] R10: 00000000004012e0 R11: 0000000000000000 R12: 00000000004009ae
[   48.583893] R13: 0000000044000004 R14: 00000000004012e0 R15: 0000000000000000
[   48.591181]  ? general_protection+0x8/0x30
[   48.595409]  ? general_protection+0x8/0x30
[   48.599652]  </ENTRY_TRAMPOLINE>
[   48.603412] Dumping ftrace buffer:
[   48.606941]    (ftrace buffer empty)
[   48.610639] Kernel Offset: disabled
[   48.614256] Rebooting in 86400 seconds..