[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.643323] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.849169] random: sshd: uninitialized urandom read (32 bytes read) [ 38.416818] random: sshd: uninitialized urandom read (32 bytes read) [ 39.867925] random: sshd: uninitialized urandom read (32 bytes read) [ 50.908841] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. [ 56.564836] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/17 18:28:08 parsed 1 programs [ 58.266804] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/17 18:28:11 executed programs: 0 [ 60.313973] IPVS: ftp: loaded support on port[0] = 21 [ 60.334863] IPVS: ftp: loaded support on port[0] = 21 [ 60.385767] IPVS: ftp: loaded support on port[0] = 21 [ 60.408620] IPVS: ftp: loaded support on port[0] = 21 [ 60.427363] IPVS: ftp: loaded support on port[0] = 21 [ 60.443348] IPVS: ftp: loaded support on port[0] = 21 [ 60.446658] IPVS: ftp: loaded support on port[0] = 21 [ 60.464173] IPVS: ftp: loaded support on port[0] = 21 [ 63.544525] PANIC: double fault, error_code: 0x0 [ 63.549372] CPU: 1 PID: 4915 Comm: syz-executor5 Not tainted 4.18.0-rc4+ #27 [ 63.556571] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.565958] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 63.571721] 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 [ 63.591186] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 63.596571] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 63.603861] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 63.611183] RBP: fffffe000003d030 R08: 0000000000000001 R09: 0000000000a3f160 [ 63.618476] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 63.625783] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 63.633071] FS: 0000000002574940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 63.641315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.647212] CR2: fffffe000003cff8 CR3: 00000001b6210000 CR4: 00000000001406e0 [ 63.654502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.661796] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.669230] Call Trace: [ 63.672187] [ 63.675507] kmsan_memmove_shadow+0x87/0xe0 [ 63.679864] __msan_memmove+0xb7/0x150 [ 63.683985] fixup_bad_iret+0x85/0x110 [ 63.687900] error_entry+0xe8/0x100 [ 63.691534] RIP: 0000: (null) [ 63.695428] Code: Bad RIP value. [ 63.698832] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 63.706564] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 63.713871] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 63.721179] RBP: 0000000000000000 R08: 000000000000fb28 R09: 0000000000000002 [ 63.728554] R10: 0000000000a3f160 R11: 0000000000000001 R12: 000000000000fb28 [ 63.736101] R13: 0000000000000002 R14: 0000000000a3f160 R15: 0000000000000001 [ 63.743497] ? general_protection+0x8/0x30 [ 63.747749] ? general_protection+0x8/0x30 [ 63.752011] [ 63.755387] Kernel panic - not syncing: Machine halted. [ 63.760775] CPU: 1 PID: 4915 Comm: syz-executor5 Not tainted 4.18.0-rc4+ #27 [ 63.768169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.777542] Call Trace: [ 63.780141] <#DF> [ 63.782317] dump_stack+0x185/0x1e0 [ 63.785975] panic+0x3d0/0x9b0 [ 63.789209] ? show_regs+0xcc/0x100 [ 63.792863] df_debug+0xa6/0xb0 [ 63.796170] do_double_fault+0x30f/0x420 [ 63.800356] double_fault+0x1e/0x30 [ 63.804008] RIP: 0010:kmsan_get_shadow_address+0x1b1/0x3d0 [ 63.809640] 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 [ 63.828981] RSP: 0018:fffffe000003d000 EFLAGS: 00010093 [ 63.834398] RAX: 000000000003d150 RBX: 0000000000000088 RCX: 000000000000002e [ 63.841690] RDX: 0000780000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 63.848981] RBP: fffffe000003d030 R08: 0000000000000001 R09: 0000000000a3f160 [ 63.856274] R10: ffffffff8a400f48 R11: ffffffff8a400f48 R12: 0000000000000001 [ 63.863650] R13: fffffe000003d150 R14: 0000000000000001 R15: 0000000000000001 [ 63.870973] ? general_protection+0x8/0x30 [ 63.875237] ? general_protection+0x8/0x30 [ 63.879516] [ 63.881769] [ 63.885078] kmsan_memmove_shadow+0x87/0xe0 [ 63.889424] __msan_memmove+0xb7/0x150 [ 63.893341] fixup_bad_iret+0x85/0x110 [ 63.897257] error_entry+0xe8/0x100 [ 63.900893] RIP: 0000: (null) [ 63.904782] Code: Bad RIP value. [ 63.908202] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 [ 63.916202] RAX: 0000000000000000 RBX: ffffffff8a400f48 RCX: 0000000000000000 [ 63.923591] RDX: 0000000000000246 RSI: 0000000000000000 RDI: 0000000000000000 [ 63.930899] RBP: 0000000000000000 R08: 000000000000fb28 R09: 0000000000000002 [ 63.938282] R10: 0000000000a3f160 R11: 0000000000000001 R12: 000000000000fb28 [ 63.945576] R13: 0000000000000002 R14: 0000000000a3f160 R15: 0000000000000001 [ 63.952878] ? general_protection+0x8/0x30 [ 63.957145] ? general_protection+0x8/0x30 [ 63.961403] [ 63.965502] Dumping ftrace buffer: [ 63.969041] (ftrace buffer empty) [ 63.972747] Kernel Offset: disabled [ 63.976376] Rebooting in 86400 seconds..