[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 35.173189] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 39.134631] random: sshd: uninitialized urandom read (32 bytes read) [ 39.589870] random: sshd: uninitialized urandom read (32 bytes read) [ 40.949881] random: sshd: uninitialized urandom read (32 bytes read) [ 41.193512] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 46.682424] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/16 11:48:58 parsed 1 programs [ 48.244642] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/16 11:49:00 executed programs: 0 [ 49.790398] IPVS: ftp: loaded support on port[0] = 21 [ 49.817343] IPVS: ftp: loaded support on port[0] = 21 [ 49.851492] IPVS: ftp: loaded support on port[0] = 21 [ 49.857297] IPVS: ftp: loaded support on port[0] = 21 [ 49.883135] IPVS: ftp: loaded support on port[0] = 21 [ 49.885805] IPVS: ftp: loaded support on port[0] = 21 [ 49.927864] IPVS: ftp: loaded support on port[0] = 21 [ 49.948967] IPVS: ftp: loaded support on port[0] = 21 [ 52.042407] PANIC: double fault, error_code: 0x0 [ 52.047246] CPU: 1 PID: 4847 Comm: syz-executor6 Not tainted 4.18.0-rc4+ #27 [ 52.054441] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.063828] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 52.069541] 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 aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 52.090634] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 52.096115] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 52.103401] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 52.110691] RBP: fffffe000003d030 R08: 0000000000000001 R09: 00007ffcb66234e0 [ 52.118012] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 52.125746] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 52.133037] FS: 00000000019ac940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 52.141277] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.147167] CR2: fffffe000003cff8 CR3: 000000019f440000 CR4: 00000000001406e0 [ 52.154454] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.162001] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.169287] Call Trace: [ 52.171879] [ 52.175181] kmsan_memmove_shadow+0x87/0xe0 [ 52.179522] __msan_memmove+0xb7/0x150 [ 52.183430] fixup_bad_iret+0x85/0x110 [ 52.187339] error_entry+0xe8/0x100 [ 52.190980] RIP: 0000: (null) [ 52.194872] Code: Bad RIP value. [ 52.198263] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 52.206077] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 52.213369] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 52.220661] RBP: 0000000000000000 R08: 000000000000ce38 R09: 0000000000000002 [ 52.227943] R10: 00007ffcb66234e0 R11: 0000000000000001 R12: 000000000000ce38 [ 52.235240] R13: 0000000000000002 R14: 00007ffcb66234e0 R15: 0000000000000001 [ 52.242621] ? general_protection+0x8/0x30 [ 52.246969] ? general_protection+0x8/0x30 [ 52.251229] [ 52.254605] Kernel panic - not syncing: Machine halted. [ 52.259986] CPU: 1 PID: 4847 Comm: syz-executor6 Not tainted 4.18.0-rc4+ #27 [ 52.267186] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.276556] Call Trace: [ 52.279148] <#DF> [ 52.281325] dump_stack+0x185/0x1e0 [ 52.284981] panic+0x3d0/0x9b0 [ 52.288231] ? show_regs+0xcc/0x100 [ 52.291884] df_debug+0xa6/0xb0 [ 52.295180] do_double_fault+0x30f/0x420 [ 52.299262] double_fault+0x1e/0x30 [ 52.302907] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 52.308542] 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 aa 84 59 ff 4c 89 e9 48 29 c1 85 c9 78 23 48 63 c1 48 3d ff af [ 52.328012] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 52.333420] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 52.340701] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 52.347987] RBP: fffffe000003d030 R08: 0000000000000001 R09: 00007ffcb66234e0 [ 52.355266] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 52.362553] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 52.369864] ? general_protection+0x8/0x30 [ 52.374122] ? general_protection+0x8/0x30 [ 52.378367] [ 52.380612] [ 52.383917] kmsan_memmove_shadow+0x87/0xe0 [ 52.388261] __msan_memmove+0xb7/0x150 [ 52.392172] fixup_bad_iret+0x85/0x110 [ 52.396082] error_entry+0xe8/0x100 [ 52.399719] RIP: 0000: (null) [ 52.403602] Code: Bad RIP value. [ 52.406997] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 52.414723] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 52.422004] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 52.429292] RBP: 0000000000000000 R08: 000000000000ce38 R09: 0000000000000002 [ 52.436576] R10: 00007ffcb66234e0 R11: 0000000000000001 R12: 000000000000ce38 [ 52.444472] R13: 0000000000000002 R14: 00007ffcb66234e0 R15: 0000000000000001 [ 52.451776] ? general_protection+0x8/0x30 [ 52.456062] ? general_protection+0x8/0x30 [ 52.460339] [ 52.464271] Dumping ftrace buffer: [ 52.467804] (ftrace buffer empty) [ 52.471502] Kernel Offset: disabled [ 52.475117] Rebooting in 86400 seconds..