[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   52.974430][   T26] audit: type=1800 audit(1579650696.266:25): pid=8590 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   52.993837][   T26] audit: type=1800 audit(1579650696.266:26): pid=8590 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   53.050353][   T26] audit: type=1800 audit(1579650696.266:27): pid=8590 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.172' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   65.072391][ T3489] ------------[ cut here ]------------
[   65.077942][ T3489] name 'šþ/]uwo,"¹cðacýµ‚•´[²$ð“5x~µsþ&æ¡tw}ùª™zºcp('
[   65.085435][ T3489] WARNING: CPU: 0 PID: 3489 at fs/proc/generic.c:178 __proc_create+0x25a/0xb60
[   65.094456][ T3489] Kernel panic - not syncing: panic_on_warn set ...
[   65.101039][ T3489] CPU: 0 PID: 3489 Comm: kworker/0:8 Not tainted 5.5.0-rc7-syzkaller #0
[   65.109373][ T3489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.119523][ T3489] Workqueue: afs afs_manage_cell
[   65.124583][ T3489] Call Trace:
[   65.127879][ T3489]  dump_stack+0x1fb/0x318
[   65.132194][ T3489]  panic+0x264/0x7a9
[   65.136070][ T3489]  ? __warn+0x105/0x210
[   65.140203][ T3489]  ? __proc_create+0x25a/0xb60
[   65.144964][ T3489]  __warn+0x209/0x210
[   65.149159][ T3489]  ? __proc_create+0x25a/0xb60
[   65.154052][ T3489]  report_bug+0x1b6/0x2f0
[   65.158394][ T3489]  ? __proc_create+0x25a/0xb60
[   65.163157][ T3489]  do_error_trap+0xda/0x440
[   65.167665][ T3489]  do_invalid_op+0x36/0x40
[   65.172262][ T3489]  ? __proc_create+0x25a/0xb60
[   65.177040][ T3489]  invalid_op+0x23/0x30
[   65.181387][ T3489] RIP: 0010:__proc_create+0x25a/0xb60
[   65.186753][ T3489] Code: 07 00 00 49 89 c6 e8 f5 48 94 ff e9 56 fe ff ff e8 eb 48 94 ff 48 8b 75 b8 45 31 ed 48 c7 c7 39 52 e1 88 31 c0 e8 36 55 66 ff <0f> 0b 48 c7 c7 88 43 11 89 e8 08 de 1a 06 e9 bc 00 00 00 e8 be 48
[   65.206513][ T3489] RSP: 0018:ffffc9000b617a90 EFLAGS: 00010246
[   65.213455][ T3489] RAX: d5e5b65e165c9c00 RBX: 0000000000000005 RCX: ffff88809bb3e140
[   65.221684][ T3489] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[   65.229653][ T3489] RBP: ffffc9000b617b00 R08: ffffffff815f9d24 R09: fffffbfff13cd11e
[   65.237920][ T3489] R10: fffffbfff13cd11e R11: 0000000000000000 R12: dffffc0000000000
[   65.245950][ T3489] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[   65.253963][ T3489]  ? vprintk_emit+0x2d4/0x3a0
[   65.258631][ T3489]  ? rcu_read_lock_sched_held+0x10b/0x170
[   65.264500][ T3489]  proc_mkdir_data+0x8b/0x150
[   65.269453][ T3489]  afs_proc_cell_setup+0x9d/0x150
[   65.274474][ T3489]  afs_manage_cell+0x750/0x1500
[   65.279345][ T3489]  ? rcu_read_lock_sched_held+0x10b/0x170
[   65.285062][ T3489]  process_one_work+0x7f5/0x10d0
[   65.290057][ T3489]  worker_thread+0xbbc/0x1630
[   65.294745][ T3489]  kthread+0x332/0x350
[   65.298809][ T3489]  ? rcu_lock_release+0x30/0x30
[   65.303651][ T3489]  ? kthread_blkcg+0xe0/0xe0
[   65.308237][ T3489]  ret_from_fork+0x24/0x30
[   65.314504][ T3489] Kernel Offset: disabled
[   65.318924][ T3489] Rebooting in 86400 seconds..