[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.990826] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   24.956455] random: sshd: uninitialized urandom read (32 bytes read)
[   25.296276] random: sshd: uninitialized urandom read (32 bytes read)
[   26.075829] random: sshd: uninitialized urandom read (32 bytes read)
[   26.224616] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts.
[   31.628104] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   31.726406] WARNING: CPU: 1 PID: 4546 at fs/attr.c:213 notify_change+0xd94/0x10c0
[   31.734047] Kernel panic - not syncing: panic_on_warn set ...
[   31.734047] 
[   31.741401] CPU: 1 PID: 4546 Comm: syz-executor876 Not tainted 4.17.0-rc2+ #45
[   31.748737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.758067] Call Trace:
[   31.760636]  dump_stack+0x1b9/0x294
[   31.764247]  ? dump_stack_print_info.cold.2+0x52/0x52
[   31.769425]  ? notify_change+0xce0/0x10c0
[   31.773560]  panic+0x22f/0x4de
[   31.776731]  ? add_taint.cold.5+0x16/0x16
[   31.780883]  ? __warn.cold.8+0x148/0x1b3
[   31.784923]  ? __warn.cold.8+0x117/0x1b3
[   31.788964]  ? notify_change+0xd94/0x10c0
[   31.793112]  __warn.cold.8+0x163/0x1b3
[   31.796981]  ? notify_change+0xd94/0x10c0
[   31.801111]  report_bug+0x252/0x2d0
[   31.804717]  do_error_trap+0x1de/0x490
[   31.808581]  ? math_error+0x420/0x420
[   31.812381]  ? kasan_check_read+0x11/0x20
[   31.816514]  ? do_raw_spin_unlock+0x9e/0x2e0
[   31.820901]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   31.825465]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   31.830289]  do_invalid_op+0x1b/0x20
[   31.833980]  invalid_op+0x14/0x20
[   31.837413] RIP: 0010:notify_change+0xd94/0x10c0
[   31.842142] RSP: 0018:ffff8801ad3ff830 EFLAGS: 00010293
[   31.847493] RAX: ffff8801ad1481c0 RBX: ffff8801d2f84100 RCX: ffffffff81c78278
[   31.854752] RDX: 0000000000000000 RSI: ffffffff81c78eb4 RDI: 0000000000000007
[   31.862005] RBP: ffff8801ad3ff900 R08: ffff8801ad1481c0 R09: ffffed003a5f083c
[   31.869253] R10: ffffed003a5f083c R11: ffff8801d2f841e7 R12: 0000000000004200
[   31.876501] R13: ffff8801ad3ff940 R14: ffff8801d4f93300 R15: 1ffff10035a7ff12
[   31.883761]  ? notify_change+0x158/0x10c0
[   31.887889]  ? notify_change+0xd94/0x10c0
[   31.892020]  ? setattr_prepare+0x6b0/0x6b0
[   31.896238]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   31.901759]  ? security_inode_need_killpriv+0x80/0xa0
[   31.906929]  file_remove_privs+0x2bf/0x530
[   31.911141]  ? generic_update_time+0x420/0x420
[   31.915715]  ? blk_lld_busy+0x70/0x70
[   31.919501]  __generic_file_write_iter+0x169/0x630
[   31.924410]  blkdev_write_iter+0x233/0x420
[   31.928622]  ? blkdev_close+0xb0/0xb0
[   31.932402]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   31.937918]  ? iov_iter_init+0xc9/0x1f0
[   31.941878]  __vfs_write+0x64d/0x960
[   31.945570]  ? kernel_read+0x120/0x120
[   31.949436]  ? rcu_is_watching+0x85/0x140
[   31.953658]  ? mntput_no_expire+0x186/0xba0
[   31.957959]  ? schedule+0xef/0x430
[   31.961482]  ? rw_verify_area+0x118/0x360
[   31.965607]  vfs_write+0x1f8/0x560
[   31.969128]  ksys_write+0xf9/0x250
[   31.972658]  ? __ia32_sys_read+0xb0/0xb0
[   31.976706]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   31.981543]  __ia32_sys_write+0x71/0xb0
[   31.985501]  do_fast_syscall_32+0x345/0xf9b
[   31.989809]  ? do_int80_syscall_32+0x880/0x880
[   31.994369]  ? kasan_check_write+0x14/0x20
[   31.998594]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   32.004110]  ? syscall_return_slowpath+0x30f/0x5c0
[   32.009021]  ? sysret32_from_system_call+0x5/0x46
[   32.013843]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   32.018667]  entry_SYSENTER_compat+0x70/0x7f
[   32.023050] RIP: 0023:0xf7f4ecb9
[   32.026394] RSP: 002b:00000000f7f2917c EFLAGS: 00000296 ORIG_RAX: 0000000000000004
[   32.034082] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000
[   32.041328] RDX: 0000000020000b80 RSI: 0000000000000003 RDI: 00000000080fa014
[   32.048581] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[   32.055837] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   32.063086] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   32.070837] Dumping ftrace buffer:
[   32.074432]    (ftrace buffer empty)
[   32.078123] Kernel Offset: disabled
[   32.081736] Rebooting in 86400 seconds..