[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.239370] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.411249] random: sshd: uninitialized urandom read (32 bytes read) [ 38.779716] random: sshd: uninitialized urandom read (32 bytes read) [ 40.183552] random: sshd: uninitialized urandom read (32 bytes read) [ 40.414733] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. [ 45.921792] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/18 05:16:54 parsed 1 programs [ 47.230815] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/18 05:16:56 executed programs: 0 [ 48.606696] IPVS: ftp: loaded support on port[0] = 21 [ 48.615803] IPVS: ftp: loaded support on port[0] = 21 [ 48.621673] IPVS: ftp: loaded support on port[0] = 21 [ 48.632513] IPVS: ftp: loaded support on port[0] = 21 [ 48.635480] IPVS: ftp: loaded support on port[0] = 21 [ 48.672463] IPVS: ftp: loaded support on port[0] = 21 [ 48.681406] IPVS: ftp: loaded support on port[0] = 21 [ 48.685277] IPVS: ftp: loaded support on port[0] = 21 2018/07/18 05:17:01 executed programs: 233 [ 55.168955] PANIC: double fault, error_code: 0x0 [ 55.173784] CPU: 1 PID: 5295 Comm: syz-executor6 Not tainted 4.18.0-rc4+ #27 [ 55.180984] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.190391] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 55.196020] 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 [ 55.215379] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 55.220764] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 55.228050] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 55.235359] RBP: fffffe000003d030 R08: 0000000000000001 R09: 0000000000a3f160 [ 55.242644] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 55.249929] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 55.257216] FS: 00000000028d2940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 55.265454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.271352] CR2: fffffe000003cff8 CR3: 000000018f3be000 CR4: 00000000001406e0 [ 55.278636] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.285922] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.293202] Call Trace: [ 55.295791] [ 55.299090] kmsan_memmove_shadow+0x87/0xe0 [ 55.303436] __msan_memmove+0xb7/0x150 [ 55.307348] fixup_bad_iret+0x85/0x110 [ 55.311265] error_entry+0xe8/0x100 [ 55.314933] RIP: 0000: (null) [ 55.318822] Code: Bad RIP value. [ 55.322226] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 55.329948] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 55.337234] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 55.344520] RBP: 0000000000000000 R08: 000000000000da8d R09: 0000000000000002 [ 55.351804] R10: 0000000000a3f160 R11: 0000000000000001 R12: 000000000000da8d [ 55.359093] R13: 0000000000000002 R14: 0000000000a3f160 R15: 0000000000000001 [ 55.366401] ? general_protection+0x8/0x30 [ 55.370664] ? general_protection+0x8/0x30 [ 55.374919] [ 55.378296] Kernel panic - not syncing: Machine halted. [ 55.383668] CPU: 1 PID: 5295 Comm: syz-executor6 Not tainted 4.18.0-rc4+ #27 [ 55.390858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.400245] Call Trace: [ 55.402839] <#DF> [ 55.405008] dump_stack+0x185/0x1e0 [ 55.408654] panic+0x3d0/0x9b0 [ 55.411879] ? show_regs+0xcc/0x100 [ 55.415525] df_debug+0xa6/0xb0 [ 55.418848] do_double_fault+0x30f/0x420 [ 55.422994] double_fault+0x1e/0x30 [ 55.426634] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 55.432278] 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 [ 55.451607] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 55.456994] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 55.464284] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 55.471568] RBP: fffffe000003d030 R08: 0000000000000001 R09: 0000000000a3f160 [ 55.478857] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 55.486140] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 55.493440] ? general_protection+0x8/0x30 [ 55.497729] ? general_protection+0x8/0x30 [ 55.501982] [ 55.504223] [ 55.507509] kmsan_memmove_shadow+0x87/0xe0 [ 55.511827] __msan_memmove+0xb7/0x150 [ 55.515720] fixup_bad_iret+0x85/0x110 [ 55.519599] error_entry+0xe8/0x100 [ 55.523208] RIP: 0000: (null) [ 55.527077] Code: Bad RIP value. [ 55.530450] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 55.538146] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 55.545419] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 55.552686] RBP: 0000000000000000 R08: 000000000000da8d R09: 0000000000000002 [ 55.559942] R10: 0000000000a3f160 R11: 0000000000000001 R12: 000000000000da8d [ 55.567201] R13: 0000000000000002 R14: 0000000000a3f160 R15: 0000000000000001 [ 55.574553] ? general_protection+0x8/0x30 [ 55.578783] ? general_protection+0x8/0x30 [ 55.583008] [ 55.586952] Dumping ftrace buffer: [ 55.590474] (ftrace buffer empty) [ 55.594178] Kernel Offset: disabled [ 55.597800] Rebooting in 86400 seconds..