[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.258429] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.034639] random: sshd: uninitialized urandom read (32 bytes read) [ 23.623822] random: sshd: uninitialized urandom read (32 bytes read) [ 24.376099] random: sshd: uninitialized urandom read (32 bytes read) [ 24.514846] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. [ 29.995417] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.078470] kasan: CONFIG_KASAN_INLINE enabled [ 30.083104] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.090484] general protection fault: 0000 [#1] SMP KASAN [ 30.096035] CPU: 0 PID: 4518 Comm: syz-executor483 Not tainted 4.18.0-rc4-next-20180713+ #7 [ 30.104507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.113863] RIP: 0010:strlen+0x1f/0xa0 [ 30.117728] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 c1 ea 03 48 89 e5 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 30.136855] RSP: 0018:ffff8801ce667488 EFLAGS: 00010296 [ 30.142216] RAX: dffffc0000000000 RBX: 1ffff10039ccce99 RCX: ffffffff877091c3 [ 30.149478] RDX: 0000000000000000 RSI: ffffffff87715fd2 RDI: 0000000000000000 [ 30.156734] RBP: ffff8801ce6674a0 R08: ffff8801ae16c580 R09: 0000000000000000 [ 30.163987] R10: fffffbfff12569a0 R11: ffffffff892b4d03 R12: 0000000000000000 [ 30.171245] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801ce667680 [ 30.178543] FS: 00000000010ef880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.186881] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.192840] CR2: 00000000200003c0 CR3: 00000001ae0f3000 CR4: 00000000001406f0 [ 30.200105] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.207370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.214622] Call Trace: [ 30.217204] p9_fd_create_unix+0xbf/0x370 [ 30.221336] ? p9_socket_open+0x220/0x220 [ 30.225483] ? kasan_unpoison_shadow+0x35/0x50 [ 30.230063] ? kasan_kmalloc+0xc4/0xe0 [ 30.233935] ? __lockdep_init_map+0x105/0x590 [ 30.238426] ? kmem_cache_alloc_trace+0x318/0x780 [ 30.243257] ? lockdep_init_map+0x9/0x10 [ 30.247314] ? __raw_spin_lock_init+0x2d/0x100 [ 30.251886] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.257410] p9_client_create+0x8ed/0x1770 [ 30.261641] ? p9_client_read+0xc60/0xc60 [ 30.265785] ? lock_acquire+0x1e4/0x540 [ 30.269755] ? lock_acquire+0x1e4/0x540 [ 30.273717] ? fs_reclaim_acquire+0x20/0x20 [ 30.278045] ? lock_release+0xa30/0xa30 [ 30.282017] ? __lockdep_init_map+0x105/0x590 [ 30.286518] ? kasan_check_write+0x14/0x20 [ 30.290749] ? __init_rwsem+0x1cc/0x2a0 [ 30.294706] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 30.299715] ? __kmalloc_track_caller+0x311/0x760 [ 30.304543] ? save_stack+0xa9/0xd0 [ 30.308151] ? save_stack+0x43/0xd0 [ 30.311761] ? kasan_kmalloc+0xc4/0xe0 [ 30.315631] ? kmem_cache_alloc_trace+0x152/0x780 [ 30.320453] ? memcpy+0x45/0x50 [ 30.323719] v9fs_session_init+0x21a/0x1a80 [ 30.328029] ? rcu_note_context_switch+0x730/0x730 [ 30.332957] ? do_mount+0x69e/0x1fb0 [ 30.336657] ? lock_acquire+0x1e4/0x540 [ 30.340618] ? lock_downgrade+0x8f0/0x8f0 [ 30.344759] ? v9fs_show_options+0x7e0/0x7e0 [ 30.349157] ? kasan_check_read+0x11/0x20 [ 30.353293] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.357696] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 30.362273] ? kasan_check_write+0x14/0x20 [ 30.366497] ? do_raw_spin_lock+0xc1/0x200 [ 30.370718] ? kasan_unpoison_shadow+0x35/0x50 [ 30.375291] ? kasan_kmalloc+0xc4/0xe0 [ 30.379165] ? kmem_cache_alloc_trace+0x318/0x780 [ 30.383996] ? kasan_unpoison_shadow+0x35/0x50 [ 30.388574] ? kasan_kmalloc+0xc4/0xe0 [ 30.392452] v9fs_mount+0x7c/0x900 [ 30.395980] ? v9fs_drop_inode+0x150/0x150 [ 30.400213] legacy_get_tree+0x118/0x440 [ 30.404355] vfs_get_tree+0x1cb/0x5c0 [ 30.408147] do_mount+0x6c1/0x1fb0 [ 30.411678] ? check_same_owner+0x340/0x340 [ 30.415983] ? lock_release+0xa30/0xa30 [ 30.419951] ? copy_mount_string+0x40/0x40 [ 30.424171] ? kasan_kmalloc+0xc4/0xe0 [ 30.428047] ? kmem_cache_alloc_trace+0x318/0x780 [ 30.432887] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.438416] ? _copy_from_user+0xdf/0x150 [ 30.442554] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.448085] ? copy_mount_options+0x285/0x380 [ 30.452571] ksys_mount+0x12d/0x140 [ 30.456188] __x64_sys_mount+0xbe/0x150 [ 30.460161] do_syscall_64+0x1b9/0x820 [ 30.464039] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.468958] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.473874] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 30.478876] ? prepare_exit_to_usermode+0x291/0x3b0 [ 30.483877] ? perf_trace_sys_enter+0xb10/0xb10 [ 30.488548] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.493392] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.498570] RIP: 0033:0x440159 [ 30.501743] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 30.520864] RSP: 002b:00007ffee9342a48 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 30.528568] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440159 [ 30.535827] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 [ 30.543094] RBP: 00000000006ca018 R08: 00000000200006c0 R09: 00000000004002c8 [ 30.550356] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 30.557612] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 30.564869] Modules linked in: [ 30.568050] Dumping ftrace buffer: [ 30.571578] (ftrace buffer empty) [ 30.575392] ---[ end trace 5390b8595872a66b ]--- [ 30.580175] RIP: 0010:strlen+0x1f/0xa0 [ 30.584085] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 c1 ea 03 48 89 e5 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 30.603326] RSP: 0018:ffff8801ce667488 EFLAGS: 00010296 [ 30.608809] RAX: dffffc0000000000 RBX: 1ffff10039ccce99 RCX: ffffffff877091c3 [ 30.616095] RDX: 0000000000000000 RSI: ffffffff87715fd2 RDI: 0000000000000000 [ 30.623379] RBP: ffff8801ce6674a0 R08: ffff8801ae16c580 R09: 0000000000000000 [ 30.630659] R10: fffffbfff12569a0 R11: ffffffff892b4d03 R12: 0000000000000000 [ 30.637942] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801ce667680 [ 30.645225] FS: 00000000010ef880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.653482] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.659371] CR2: 00000000200003c0 CR3: 00000001ae0f3000 CR4: 00000000001406f0 [ 30.666655] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.673953] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.681238] Kernel panic - not syncing: Fatal exception [ 30.687142] Dumping ftrace buffer: [ 30.690670] (ftrace buffer empty) [ 30.694380] Kernel Offset: disabled [ 30.697993] Rebooting in 86400 seconds..