[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.962934] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.375791] random: sshd: uninitialized urandom read (32 bytes read) [ 36.857857] random: sshd: uninitialized urandom read (32 bytes read) [ 38.274565] random: sshd: uninitialized urandom read (32 bytes read) [ 48.580877] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. [ 54.099818] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/21 11:46:45 parsed 1 programs [ 55.202834] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/21 11:46:47 executed programs: 0 [ 56.754629] IPVS: ftp: loaded support on port[0] = 21 [ 56.762875] IPVS: ftp: loaded support on port[0] = 21 [ 56.766448] IPVS: ftp: loaded support on port[0] = 21 [ 56.777894] IPVS: ftp: loaded support on port[0] = 21 [ 56.780626] IPVS: ftp: loaded support on port[0] = 21 [ 56.801388] IPVS: ftp: loaded support on port[0] = 21 [ 56.804292] IPVS: ftp: loaded support on port[0] = 21 [ 56.807762] IPVS: ftp: loaded support on port[0] = 21 2018/07/21 11:46:52 executed programs: 246 [ 65.957167] PANIC: double fault, error_code: 0x0 [ 65.961978] CPU: 1 PID: 5551 Comm: blkid Not tainted 4.18.0-rc5+ #29 [ 65.968469] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.977840] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 65.983456] 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 [ 66.002778] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 66.008152] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 66.015424] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 66.022695] RBP: fffffe000003d030 R08: 00007f239a25c028 R09: 00007f239a04ca0b [ 66.029969] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 66.037241] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 66.044517] FS: 00007f239a252740(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 66.052764] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.058648] CR2: fffffe000003cff8 CR3: 00000001b34b6000 CR4: 00000000001406e0 [ 66.065929] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.073203] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.080468] Call Trace: [ 66.083050] [ 66.086341] kmsan_memmove_shadow+0x87/0xe0 [ 66.090673] __msan_memmove+0xb7/0x150 [ 66.094579] fixup_bad_iret+0x85/0x110 [ 66.098480] error_entry+0xe8/0x100 [ 66.102105] RIP: 0000: (null) [ 66.105984] Code: Bad RIP value. [ 66.109367] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 66.117079] RAX: 00007ffce2ecde40 RBX: ffffffff8a400f48 RCX: 00007f239a25c9d8 [ 66.124348] RDX: 0000000000000206 RSI: 000000009a04ca0b RDI: 0000000000000000 [ 66.131618] RBP: 00007ffce2ecde40 R08: 00007f239a03c000 R09: 00007f239a03ca78 [ 66.138891] R10: 00007f239a04ca0b R11: 00007f239a25c028 R12: 00007f239a03c000 [ 66.146160] R13: 00007f239a03ca78 R14: 00007f239a04ca0b R15: 00007f239a25c028 [ 66.153446] ? general_protection+0x8/0x30 [ 66.157691] ? general_protection+0x8/0x30 [ 66.161931] [ 66.165293] Kernel panic - not syncing: Machine halted. [ 66.170660] CPU: 1 PID: 5551 Comm: blkid Not tainted 4.18.0-rc5+ #29 [ 66.177146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.186498] Call Trace: [ 66.189079] <#DF> [ 66.191241] dump_stack+0x185/0x1e0 [ 66.194881] panic+0x3d0/0x9b0 [ 66.198094] ? show_regs+0xcc/0x100 [ 66.201735] df_debug+0xa6/0xb0 [ 66.205024] do_double_fault+0x30f/0x420 [ 66.209103] double_fault+0x1e/0x30 [ 66.212738] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 66.218357] 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 [ 66.237685] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 66.243053] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 66.250327] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 66.257605] RBP: fffffe000003d030 R08: 00007f239a25c028 R09: 00007f239a04ca0b [ 66.264877] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 66.272148] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 66.281037] ? general_protection+0x8/0x30 [ 66.285279] ? general_protection+0x8/0x30 [ 66.289530] [ 66.291767] [ 66.295059] kmsan_memmove_shadow+0x87/0xe0 [ 66.299392] __msan_memmove+0xb7/0x150 [ 66.303295] fixup_bad_iret+0x85/0x110 [ 66.307197] error_entry+0xe8/0x100 [ 66.310836] RIP: 0000: (null) [ 66.314715] Code: Bad RIP value. [ 66.318098] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 66.325816] RAX: 00007ffce2ecde40 RBX: ffffffff8a400f48 RCX: 00007f239a25c9d8 [ 66.333090] RDX: 0000000000000206 RSI: 000000009a04ca0b RDI: 0000000000000000 [ 66.340364] RBP: 00007ffce2ecde40 R08: 00007f239a03c000 R09: 00007f239a03ca78 [ 66.347637] R10: 00007f239a04ca0b R11: 00007f239a25c028 R12: 00007f239a03c000 [ 66.354912] R13: 00007f239a03ca78 R14: 00007f239a04ca0b R15: 00007f239a25c028 [ 66.362201] ? general_protection+0x8/0x30 [ 66.366446] ? general_protection+0x8/0x30 [ 66.370689] [ 66.374635] Dumping ftrace buffer: [ 66.378166] (ftrace buffer empty) [ 66.381855] Kernel Offset: disabled [ 66.385468] Rebooting in 86400 seconds..