[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.003615] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.414630] random: sshd: uninitialized urandom read (32 bytes read) [ 24.794731] random: sshd: uninitialized urandom read (32 bytes read) [ 25.519163] random: sshd: uninitialized urandom read (32 bytes read) [ 25.671787] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. [ 31.075185] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/08 03:09:42 parsed 1 programs 2018/05/08 03:09:42 executed programs: 0 [ 31.580074] IPVS: ftp: loaded support on port[0] = 21 2018/05/08 03:09:47 executed programs: 6 [ 41.480717] BUG: spinlock bad magic on CPU#0, syz-executor0/4586 [ 41.487612] lock: 0xffff8801ae8928c8, .magic: 00000000, .owner: /-1, .owner_cpu: 0 [ 41.496052] CPU: 0 PID: 4586 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #62 [ 41.503229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.512581] Call Trace: [ 41.515169] dump_stack+0x1b9/0x294 [ 41.518954] ? dump_stack_print_info.cold.2+0x52/0x52 [ 41.524130] ? lock_release+0xa10/0xa10 [ 41.528181] spin_dump+0x160/0x169 [ 41.531705] do_raw_spin_lock.cold.3+0x37/0x3c [ 41.536272] _raw_spin_lock+0x32/0x40 [ 41.540056] ? tun_do_read+0x18b1/0x29f0 [ 41.544101] tun_do_read+0x18b1/0x29f0 [ 41.547969] ? __enqueue_entity+0x10d/0x1f0 [ 41.552275] ? tun_flow_update+0x10d0/0x10d0 [ 41.556674] ? find_held_lock+0x36/0x1c0 [ 41.560721] ? graph_lock+0x170/0x170 [ 41.564501] ? finish_task_switch+0x182/0x810 [ 41.568992] ? kasan_check_read+0x11/0x20 [ 41.573310] ? do_raw_spin_unlock+0x9e/0x2e0 [ 41.577708] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 41.582279] ? find_held_lock+0x36/0x1c0 [ 41.586324] ? kasan_check_read+0x11/0x20 [ 41.590458] ? rcu_is_watching+0x85/0x140 [ 41.594586] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 41.599762] ? wake_up_q+0x100/0x100 [ 41.603460] tun_chr_read_iter+0xe5/0x1e0 [ 41.607598] __vfs_read+0x696/0xa50 [ 41.611569] ? vfs_copy_file_range+0xb80/0xb80 [ 41.616140] ? fsnotify+0xfc0/0xfc0 [ 41.619759] ? fsnotify_first_mark+0x330/0x330 [ 41.624320] ? __fget_light+0x2ef/0x430 [ 41.628275] ? fget_raw+0x20/0x20 [ 41.631711] ? rw_verify_area+0x118/0x360 [ 41.635845] vfs_read+0x17f/0x3d0 [ 41.639279] ksys_pread64+0x174/0x1a0 [ 41.643067] ? __ia32_sys_write+0xb0/0xb0 [ 41.647195] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 41.652206] __ia32_compat_sys_x86_pread+0xc4/0x130 [ 41.657215] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.662230] do_fast_syscall_32+0x345/0xf9b [ 41.666564] ? do_int80_syscall_32+0x880/0x880 [ 41.671339] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 41.676222] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.681836] ? syscall_return_slowpath+0x30f/0x5c0 [ 41.686755] ? sysret32_from_system_call+0x5/0x46 [ 41.691674] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.696844] entry_SYSENTER_compat+0x70/0x7f [ 41.701231] RIP: 0023:0xf7fc0cb9 [ 41.704571] RSP: 002b:00000000f7fbc0ac EFLAGS: 00000282 ORIG_RAX: 00000000000000b4 [ 41.712260] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 [ 41.719777] RDX: 000000000000006e RSI: 0000000000000000 RDI: 0000000000000000 2018/05/08 03:09:52 executed programs: 12 [ 41.727119] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 41.734548] R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 [ 41.741814] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000