[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.090283] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.269763] random: sshd: uninitialized urandom read (32 bytes read) [ 21.479038] random: sshd: uninitialized urandom read (32 bytes read) [ 22.253732] random: sshd: uninitialized urandom read (32 bytes read) [ 55.803208] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. [ 61.268901] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program [ 61.662224] INFO: trying to register non-static key. [ 61.667339] the code is fine but needs lockdep annotation. [ 61.672934] turning off the locking correctness validator. [ 61.678533] CPU: 1 PID: 3819 Comm: syz-executor551 Not tainted 4.9.98-ga03d0bb #21 [ 61.686211] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.695544] ffff8801d89a7790 ffffffff81eb0e89 0000000000000000 ffffffff85b2d700 [ 61.703523] ffff8801d4c9a7a0 dffffc0000000000 0000000000000000 ffff8801d89a7810 [ 61.711519] ffffffff81230b40 ffffffff8558c640 ffff8801d5020080 000000000000377a [ 61.719498] Call Trace: [ 61.722059] [] dump_stack+0xc1/0x128 [ 61.727934] [] register_lock_class+0x1460/0x1470 [ 61.734311] [] __lock_acquire+0x169/0x4070 [ 61.740293] [] ? check_preemption_disabled+0x3b/0x170 [ 61.747122] [] ? debug_check_no_locks_freed+0x210/0x210 [ 61.754112] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 61.760407] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 61.767225] [] ? _raw_spin_unlock_irq+0x38/0x50 [ 61.773527] [] ? finish_task_switch+0x1ed/0x640 [ 61.779819] [] ? finish_task_switch+0x1c1/0x640 [ 61.786116] [] ? __schedule+0x61f/0x1bd0 [ 61.791908] [] lock_acquire+0x130/0x3e0 [ 61.797507] [] ? tun_do_read.part.42+0x74d/0x1250 [ 61.803973] [] _raw_spin_lock+0x36/0x50 [ 61.809566] [] ? tun_do_read.part.42+0x74d/0x1250 [ 61.816031] [] tun_do_read.part.42+0x74d/0x1250 [ 61.822324] [] ? tun_cleanup_tx_array.part.39+0x1f0/0x1f0 [ 61.829485] [] ? check_preemption_disabled+0x3b/0x170 [ 61.836294] [] ? wake_up_q+0xe0/0xe0 [ 61.841628] [] tun_chr_read_iter+0x161/0x1f0 [ 61.847659] [] __vfs_read+0x3dd/0x570 [ 61.853080] [] ? do_iter_readv_writev+0x4b0/0x4b0 [ 61.859554] [] ? __fsnotify_update_child_dentry_flags.part.1+0x300/0x300 [ 61.868017] [] ? fsnotify+0x1100/0x1100 [ 61.873617] [] ? avc_policy_seqno+0x9/0x20 [ 61.879472] [] ? selinux_file_permission+0x82/0x470 [ 61.886118] [] ? rw_verify_area+0xe5/0x2b0 [ 61.891978] [] vfs_read+0x120/0x380 [ 61.897229] [] SyS_pread64+0x145/0x170 [ 61.902743] [] ? SyS_write+0x1c0/0x1c0 executing program [ 61.908251] [] ? do_syscall_64+0x48/0x490 [ 61.914020] [] ? SyS_write+0x1c0/0x1c0 [ 61.919530] [] do_syscall_64+0x1a6/0x490 [ 61.925215] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program