[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.522588] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.666580] random: sshd: uninitialized urandom read (32 bytes read) [ 39.084410] random: sshd: uninitialized urandom read (32 bytes read) [ 40.483234] random: sshd: uninitialized urandom read (32 bytes read) [ 40.715642] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. [ 46.246348] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/16 07:59:43 parsed 1 programs [ 47.725566] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/16 07:59:46 executed programs: 0 [ 49.214017] IPVS: ftp: loaded support on port[0] = 21 [ 49.223522] IPVS: ftp: loaded support on port[0] = 21 [ 49.225874] IPVS: ftp: loaded support on port[0] = 21 [ 49.248333] IPVS: ftp: loaded support on port[0] = 21 [ 49.262150] IPVS: ftp: loaded support on port[0] = 21 [ 49.287794] IPVS: ftp: loaded support on port[0] = 21 [ 49.296132] IPVS: ftp: loaded support on port[0] = 21 [ 49.325915] IPVS: ftp: loaded support on port[0] = 21 [ 52.804376] PANIC: double fault, error_code: 0x0 [ 52.809202] CPU: 0 PID: 5011 Comm: syz-executor5 Not tainted 4.18.0-rc4+ #27 [ 52.816394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.825782] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 52.831402] 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 [ 52.850712] RSP: 0018:fffffe0000002000 EFLAGS: 00010093 [ 52.856085] RAX: 0000000000002150 RBX: 0000000000000088 RCX: 000000000000002e [ 52.863360] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 52.870638] RBP: fffffe0000002030 R08: 0000000000000001 R09: 00000000004d3ae0 [ 52.877914] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 52.885192] R13: fffffe0000002150 R14: 0000000000000001 R15: 0000000000000000 [ 52.892470] FS: 000000000224f940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 52.900705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.906593] CR2: fffffe0000001ff8 CR3: 00000001bcb18000 CR4: 00000000001406f0 [ 52.913888] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.921162] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.928429] Call Trace: [ 52.931012] [ 52.934307] kmsan_memmove_shadow+0x87/0xe0 [ 52.938640] __msan_memmove+0xb7/0x150 [ 52.942546] fixup_bad_iret+0x85/0x110 [ 52.946449] error_entry+0xe8/0x100 [ 52.950079] RIP: 0000:0x46 [ 52.952913] Code: Bad RIP value. [ 52.956293] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 52.964018] RAX: 0000000020000700 RBX: ffffffff8a400f48 RCX: 0000000000000046 [ 52.971292] RDX: 0000000000000246 RSI: 0000000000000046 RDI: 0000000000000000 [ 52.978566] RBP: 0000000020000700 R08: 00000000ffffffff R09: 00000000004c20a6 [ 52.985841] R10: 00000000004d3ae0 R11: 0000000000000001 R12: 00000000ffffffff [ 52.993116] R13: 00000000004c20a6 R14: 00000000004d3ae0 R15: 0000000000000001 [ 53.000407] ? general_protection+0x8/0x30 [ 53.004664] ? general_protection+0x8/0x30 [ 53.008916] [ 53.012290] Kernel panic - not syncing: Machine halted. [ 53.017668] CPU: 0 PID: 5011 Comm: syz-executor5 Not tainted 4.18.0-rc4+ #27 [ 53.024852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.034204] Call Trace: [ 53.036788] <#DF> [ 53.038948] dump_stack+0x185/0x1e0 [ 53.042591] panic+0x3d0/0x9b0 [ 53.045812] ? show_regs+0xcc/0x100 [ 53.049448] df_debug+0xa6/0xb0 [ 53.052740] do_double_fault+0x30f/0x420 [ 53.056817] double_fault+0x1e/0x30 [ 53.060455] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 53.066076] 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 [ 53.085402] RSP: 0018:fffffe0000002000 EFLAGS: 00010093 [ 53.090769] RAX: 0000000000002150 RBX: 0000000000000088 RCX: 000000000000002e [ 53.098042] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 53.105319] RBP: fffffe0000002030 R08: 0000000000000001 R09: 00000000004d3ae0 [ 53.112590] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 53.119867] R13: fffffe0000002150 R14: 0000000000000001 R15: 0000000000000000 [ 53.127162] ? general_protection+0x8/0x30 [ 53.131406] ? general_protection+0x8/0x30 [ 53.135642] [ 53.137871] [ 53.141268] kmsan_memmove_shadow+0x87/0xe0 [ 53.145601] __msan_memmove+0xb7/0x150 [ 53.149508] fixup_bad_iret+0x85/0x110 [ 53.153414] error_entry+0xe8/0x100 [ 53.157046] RIP: 0000:0x46 [ 53.159884] Code: Bad RIP value. [ 53.163267] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 53.170980] RAX: 0000000020000700 RBX: ffffffff8a400f48 RCX: 0000000000000046 [ 53.178251] RDX: 0000000000000246 RSI: 0000000000000046 RDI: 0000000000000000 [ 53.185520] RBP: 0000000020000700 R08: 00000000ffffffff R09: 00000000004c20a6 [ 53.192795] R10: 00000000004d3ae0 R11: 0000000000000001 R12: 00000000ffffffff [ 53.200066] R13: 00000000004c20a6 R14: 00000000004d3ae0 R15: 0000000000000001 [ 53.207350] ? general_protection+0x8/0x30 [ 53.211593] ? general_protection+0x8/0x30 [ 53.215834] [ 53.219673] Dumping ftrace buffer: [ 53.223198] (ftrace buffer empty) [ 53.226886] Kernel Offset: disabled [ 53.230492] Rebooting in 86400 seconds..