[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.627195] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.249515] random: sshd: uninitialized urandom read (32 bytes read) [ 18.496019] random: sshd: uninitialized urandom read (32 bytes read) [ 18.927147] random: sshd: uninitialized urandom read (32 bytes read) [ 19.475432] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. [ 25.179586] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 25.267672] kasan: CONFIG_KASAN_INLINE enabled [ 25.272371] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.279779] general protection fault: 0000 [#1] SMP KASAN [ 25.285316] CPU: 0 PID: 4328 Comm: syz-executor623 Not tainted 4.18.0-rc8-next-20180807+ #33 [ 25.293870] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.303212] RIP: 0010:kstrtouint+0x83/0x1b0 [ 25.307518] Code: f1 f1 c7 40 04 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 1a 31 18 fe 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 e8 00 00 00 44 0f b6 33 bf [ 25.326407] RSP: 0018:ffff8801ad63f888 EFLAGS: 00010246 [ 25.331787] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff10035ac7f5f [ 25.339039] RDX: 0000000000000000 RSI: ffffffff8364fc96 RDI: 0000000000000000 [ 25.346291] RBP: ffff8801ad63f918 R08: ffff8801ad5da3c0 R09: ffff8801ad588580 [ 25.353544] R10: 00000000900ed4cc R11: ffff8801db0236b3 R12: 1ffff10035ac7f12 [ 25.360797] R13: ffff8801ad63fa18 R14: dffffc0000000000 R15: ffff8801ad63f8f0 [ 25.368056] FS: 0000000001d3b880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 25.376274] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.382139] CR2: 00007fbd50b94518 CR3: 00000001c46c3000 CR4: 00000000001406f0 [ 25.389394] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.396650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.403910] Call Trace: [ 25.406481] ? _kstrtoul+0x180/0x180 [ 25.410177] ? cmp_constant+0x34/0x50 [ 25.413978] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 25.419501] ? bsearch+0xa6/0xc0 [ 25.422849] ? __lookup_constant+0x80/0x80 [ 25.427068] fs_parse+0xb8d/0x1130 [ 25.430604] hugetlbfs_parse_param+0xd1/0xa50 [ 25.435084] ? hugetlbfs_fill_super+0xa40/0xa40 [ 25.439737] ? cmp_constant+0x34/0x50 [ 25.443543] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 25.449064] ? bsearch+0xa6/0xc0 [ 25.452429] ? __lookup_constant+0x80/0x80 [ 25.456658] ? hugetlbfs_fill_super+0xa40/0xa40 [ 25.461317] vfs_parse_fs_param+0x196/0x2c0 [ 25.465622] vfs_parse_fs_string+0x1d5/0x2b0 [ 25.470016] ? vfs_parse_fs_param+0x2c0/0x2c0 [ 25.474500] ? trace_hardirqs_on+0xd/0x10 [ 25.478636] generic_parse_monolithic+0x17c/0x210 [ 25.483476] ? vfs_parse_fs_string+0x2b0/0x2b0 [ 25.488046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 25.493573] ? vfs_parse_fs_string+0x2b0/0x2b0 [ 25.498143] do_mount+0x6d8/0x1e30 [ 25.501674] ? check_same_owner+0x340/0x340 [ 25.505980] ? lock_release+0xa30/0xa30 [ 25.509940] ? copy_mount_string+0x40/0x40 [ 25.514160] ? kasan_kmalloc+0xc4/0xe0 [ 25.518038] ? kmem_cache_alloc_trace+0x318/0x780 [ 25.522877] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 25.529038] ? _copy_from_user+0xdf/0x150 [ 25.533176] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 25.538697] ? copy_mount_options+0x285/0x380 [ 25.543176] ksys_mount+0x12d/0x140 [ 25.546788] __x64_sys_mount+0xbe/0x150 [ 25.550746] do_syscall_64+0x1b9/0x820 [ 25.554614] ? syscall_return_slowpath+0x5e0/0x5e0 [ 25.559526] ? syscall_return_slowpath+0x31d/0x5e0 [ 25.564441] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 25.569438] ? prepare_exit_to_usermode+0x291/0x3b0 [ 25.574438] ? perf_trace_sys_enter+0xb10/0xb10 [ 25.579091] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.583926] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 25.589102] RIP: 0033:0x4441a9 [ 25.592284] Code: 0d d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 25.611189] RSP: 002b:00007ffcb4f5f8a8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 25.618887] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004441a9 [ 25.626150] RDX: 0000000020000300 RSI: 0000000020000340 RDI: 0000000020000000 [ 25.633406] RBP: 00000000006cf018 R08: 00000000200001c0 R09: 00000000200001c0 [ 25.640669] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000401e10 [ 25.647927] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 25.655183] Modules linked in: [ 25.658359] Dumping ftrace buffer: [ 25.661873] (ftrace buffer empty) [ 25.665889] ---[ end trace 3277e6ee2f78e7e4 ]--- [ 25.670698] RIP: 0010:kstrtouint+0x83/0x1b0 [ 25.675049] Code: f1 f1 c7 40 04 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 1a 31 18 fe 48 89 d8 48 89 da 48 c1 e8 03 83 e2 07 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 e8 00 00 00 44 0f b6 33 bf [ 25.694001] RSP: 0018:ffff8801ad63f888 EFLAGS: 00010246 [ 25.699420] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff10035ac7f5f [ 25.706701] RDX: 0000000000000000 RSI: ffffffff8364fc96 RDI: 0000000000000000 [ 25.713991] RBP: ffff8801ad63f918 R08: ffff8801ad5da3c0 R09: ffff8801ad588580 [ 25.721260] R10: 00000000900ed4cc R11: ffff8801db0236b3 R12: 1ffff10035ac7f12 [ 25.728546] R13: ffff8801ad63fa18 R14: dffffc0000000000 R15: ffff8801ad63f8f0 [ 25.735832] FS: 0000000001d3b880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 25.744170] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.750064] CR2: 00007fbd50b94518 CR3: 00000001c46c3000 CR4: 00000000001406f0 [ 25.757357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.764635] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.771930] Kernel panic - not syncing: Fatal exception [ 25.777576] Dumping ftrace buffer: [ 25.781098] (ftrace buffer empty) [ 25.784797] Kernel Offset: disabled [ 25.788416] Rebooting in 86400 seconds..