[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.140716] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 34.378749] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.733721] random: sshd: uninitialized urandom read (32 bytes read) [ 36.169737] random: sshd: uninitialized urandom read (32 bytes read) [ 65.325249] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. [ 70.749833] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/21 16:08:02 parsed 1 programs [ 72.003886] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/21 16:08:04 executed programs: 0 [ 73.331740] IPVS: ftp: loaded support on port[0] = 21 [ 73.346253] IPVS: ftp: loaded support on port[0] = 21 [ 73.359330] IPVS: ftp: loaded support on port[0] = 21 [ 73.360211] IPVS: ftp: loaded support on port[0] = 21 [ 73.374246] IPVS: ftp: loaded support on port[0] = 21 [ 73.383099] IPVS: ftp: loaded support on port[0] = 21 [ 73.396532] IPVS: ftp: loaded support on port[0] = 21 [ 73.421246] IPVS: ftp: loaded support on port[0] = 21 [ 74.753610] PANIC: double fault, error_code: 0x0 [ 74.758398] CPU: 1 PID: 4792 Comm: blkid Not tainted 4.18.0-rc5+ #29 [ 74.764866] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.774215] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 74.779813] 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 da 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 74.798972] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 74.804316] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 74.811569] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 74.818819] RBP: fffffe000003d030 R08: 00007fff1e566240 R09: 00007fff1e566270 [ 74.826069] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 74.833321] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 74.840569] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 74.848776] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.854641] CR2: fffffe000003cff8 CR3: 00000001a933c000 CR4: 00000000001406e0 [ 74.861895] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.869145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.876403] Call Trace: [ 74.878967] [ 74.882238] kmsan_memmove_shadow+0x87/0xe0 [ 74.886543] __msan_memmove+0xb7/0x150 [ 74.890415] fixup_bad_iret+0x85/0x110 [ 74.894286] error_entry+0xe8/0x100 [ 74.897890] RIP: 0000: (null) [ 74.901752] Code: Bad RIP value. [ 74.905111] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 74.912799] RAX: 00007fff1e5664c0 RBX: ffffffff8a400f48 RCX: 00007f4772f8f4c8 [ 74.920051] RDX: 00007f4772d882d6 RSI: 0000000072d708a8 RDI: 0000000000000000 [ 74.927302] RBP: 00007fff1e5664c0 R08: 00007fff1e5665a8 R09: 0000000000000002 [ 74.934552] R10: 00007fff1e566270 R11: 00007fff1e566240 R12: 00007fff1e5665a8 [ 74.941813] R13: 0000000000000002 R14: 00007fff1e566270 R15: 00007fff1e566240 [ 74.949074] ? general_protection+0x8/0x30 [ 74.953295] ? general_protection+0x8/0x30 [ 74.957514] [ 74.960856] Kernel panic - not syncing: Machine halted. [ 74.966200] CPU: 1 PID: 4792 Comm: blkid Not tainted 4.18.0-rc5+ #29 [ 74.972684] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.982016] Call Trace: [ 74.984587] <#DF> [ 74.986725] dump_stack+0x185/0x1e0 [ 74.990336] panic+0x3d0/0x9b0 [ 74.993517] ? show_regs+0xcc/0x100 [ 74.997131] df_debug+0xa6/0xb0 [ 75.000408] do_double_fault+0x30f/0x420 [ 75.004466] double_fault+0x1e/0x30 [ 75.008076] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 75.013760] 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 da 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 75.032928] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 75.038271] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 75.045524] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 75.052774] RBP: fffffe000003d030 R08: 00007fff1e566240 R09: 00007fff1e566270 [ 75.060024] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 75.067272] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 75.074531] ? general_protection+0x8/0x30 [ 75.078757] ? general_protection+0x8/0x30 [ 75.082970] [ 75.085185] [ 75.088448] kmsan_memmove_shadow+0x87/0xe0 [ 75.092755] __msan_memmove+0xb7/0x150 [ 75.096628] fixup_bad_iret+0x85/0x110 [ 75.100504] error_entry+0xe8/0x100 [ 75.104120] RIP: 0000: (null) [ 75.108004] Code: Bad RIP value. [ 75.111396] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 75.119111] RAX: 00007fff1e5664c0 RBX: ffffffff8a400f48 RCX: 00007f4772f8f4c8 [ 75.126384] RDX: 00007f4772d882d6 RSI: 0000000072d708a8 RDI: 0000000000000000 [ 75.133663] RBP: 00007fff1e5664c0 R08: 00007fff1e5665a8 R09: 0000000000000002 [ 75.140935] R10: 00007fff1e566270 R11: 00007fff1e566240 R12: 00007fff1e5665a8 [ 75.148206] R13: 0000000000000002 R14: 00007fff1e566270 R15: 00007fff1e566240 [ 75.155554] ? general_protection+0x8/0x30 [ 75.159804] ? general_protection+0x8/0x30 [ 75.164044] [ 75.168043] Dumping ftrace buffer: [ 75.171575] (ftrace buffer empty) [ 75.175278] Kernel Offset: disabled [ 75.178887] Rebooting in 86400 seconds..