[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.627388] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.796834] random: sshd: uninitialized urandom read (32 bytes read) [ 26.466325] random: sshd: uninitialized urandom read (32 bytes read) [ 27.366820] random: sshd: uninitialized urandom read (32 bytes read) [ 27.543416] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 33.023636] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.118527] kasan: CONFIG_KASAN_INLINE enabled [ 33.123233] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.130641] general protection fault: 0000 [#1] SMP KASAN [ 33.136233] CPU: 0 PID: 4535 Comm: syz-executor419 Not tainted 4.18.0-rc4+ #141 [ 33.143680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.153042] RIP: 0010:strlen+0x1f/0xa0 [ 33.156908] 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 [ 33.176052] RSP: 0018:ffff8801af2df3d8 EFLAGS: 00010296 [ 33.181408] RAX: dffffc0000000000 RBX: 1ffff10035e5be83 RCX: ffffffff8766d02b [ 33.188671] RDX: 0000000000000000 RSI: ffffffff87679de2 RDI: 0000000000000000 [ 33.195937] RBP: ffff8801af2df3f0 R08: ffff8801aee4a240 R09: 0000000000000000 [ 33.203198] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000000 [ 33.210456] R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff10035e5beba [ 33.217718] FS: 0000000001e72880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 33.225942] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.231823] CR2: 00000000200003c0 CR3: 00000001aeec6000 CR4: 00000000001406f0 [ 33.239084] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.246344] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.253613] Call Trace: [ 33.256205] p9_fd_create_unix+0xbf/0x370 [ 33.260350] ? p9_socket_open+0x220/0x220 [ 33.264500] ? p9_idpool_create+0x42/0x190 [ 33.269257] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.274638] ? kmem_cache_alloc_trace+0x616/0x780 [ 33.279473] ? __lockdep_init_map+0x105/0x590 [ 33.283966] ? lockdep_init_map+0x9/0x10 [ 33.288026] ? __raw_spin_lock_init+0x2d/0x100 [ 33.292611] p9_client_create+0x915/0x16c9 [ 33.296844] ? p9_client_read+0xc60/0xc60 [ 33.300982] ? find_held_lock+0x36/0x1c0 [ 33.305100] ? __lockdep_init_map+0x105/0x590 [ 33.309595] ? kasan_check_write+0x14/0x20 [ 33.313903] ? __init_rwsem+0x1cc/0x2a0 [ 33.317871] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 33.323071] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.328087] ? __kmalloc_track_caller+0x5f5/0x760 [ 33.332927] ? save_stack+0xa9/0xd0 [ 33.336556] ? save_stack+0x43/0xd0 [ 33.340181] ? kasan_kmalloc+0xc4/0xe0 [ 33.344058] ? kmem_cache_alloc_trace+0x152/0x780 [ 33.349258] ? memcpy+0x45/0x50 [ 33.352541] v9fs_session_init+0x21a/0x1a80 [ 33.356877] ? find_held_lock+0x36/0x1c0 [ 33.361190] ? v9fs_show_options+0x7e0/0x7e0 [ 33.365583] ? kasan_check_read+0x11/0x20 [ 33.369712] ? rcu_is_watching+0x8c/0x150 [ 33.373845] ? rcu_pm_notify+0xc0/0xc0 [ 33.377732] ? v9fs_mount+0x61/0x900 [ 33.381533] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.386557] ? kmem_cache_alloc_trace+0x616/0x780 [ 33.391482] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 33.397009] v9fs_mount+0x7c/0x900 [ 33.400546] mount_fs+0xae/0x328 [ 33.403920] vfs_kern_mount.part.34+0xdc/0x4e0 [ 33.408499] ? may_umount+0xb0/0xb0 [ 33.412113] ? _raw_read_unlock+0x22/0x30 [ 33.416249] ? __get_fs_type+0x97/0xc0 [ 33.420124] do_mount+0x581/0x30e0 [ 33.423670] ? copy_mount_string+0x40/0x40 [ 33.428044] ? copy_mount_options+0x5f/0x380 [ 33.432451] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.437475] ? kmem_cache_alloc_trace+0x616/0x780 [ 33.442307] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.447879] ? _copy_from_user+0xdf/0x150 [ 33.452028] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.457576] ? copy_mount_options+0x285/0x380 [ 33.462078] ksys_mount+0x12d/0x140 [ 33.465702] __x64_sys_mount+0xbe/0x150 [ 33.469678] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.474687] do_syscall_64+0x1b9/0x820 [ 33.478572] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.483489] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.488409] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 33.493773] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.498610] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.503806] RIP: 0033:0x440159 [ 33.507000] 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 [ 33.526201] RSP: 002b:00007fffa01e83a8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 33.533915] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440159 [ 33.541185] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 [ 33.549640] RBP: 00000000006ca018 R08: 00000000200006c0 R09: 00000000004002c8 [ 33.556911] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 33.564169] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 33.571430] Modules linked in: [ 33.574620] Dumping ftrace buffer: [ 33.578140] (ftrace buffer empty) [ 33.581945] ---[ end trace fcc1910ad3a9d968 ]--- [ 33.586763] RIP: 0010:strlen+0x1f/0xa0 [ 33.590683] 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 [ 33.609994] RSP: 0018:ffff8801af2df3d8 EFLAGS: 00010296 [ 33.615431] RAX: dffffc0000000000 RBX: 1ffff10035e5be83 RCX: ffffffff8766d02b [ 33.622729] RDX: 0000000000000000 RSI: ffffffff87679de2 RDI: 0000000000000000 [ 33.630036] RBP: ffff8801af2df3f0 R08: ffff8801aee4a240 R09: 0000000000000000 [ 33.637335] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000000 [ 33.644709] R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff10035e5beba [ 33.652048] FS: 0000000001e72880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 33.660311] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.666246] CR2: 00000000200003c0 CR3: 00000001aeec6000 CR4: 00000000001406f0 [ 33.673575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.680900] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.688198] Kernel panic - not syncing: Fatal exception [ 33.694123] Dumping ftrace buffer: [ 33.697650] (ftrace buffer empty) [ 33.701360] Kernel Offset: disabled [ 33.704994] Rebooting in 86400 seconds..