Deleting files causes cryfs crash / freeze

[tobrunn]

Expected Behavior

You should be able to delete files in a mountpoint of a cryfs basedir.

Actual Behavior

When trying to delete a file in a mountpoint where a cryfs basedir with 30GB Data is mounted it takes extremly long and mostly the shell freezes completely. Even log-off and log-in does not stop cryfs. You have to kill it which leads to filesystem corruption.

Steps to Reproduce the Problem

$ cryfs -o noatime /net/server/basedir /home/user/mountpoint
CryFS Version 0.11.3

Password:
Deriving encryption key (this can take some time)...done

---

Filesystem configuration:

• Filesystem format version: 0.10
• Created with: CryFS 0.11.3
• Last opened with: CryFS 0.11.3
• Cipher: xchacha20-poly1305
• Blocksize: 16384 bytes
• Filesystem Id:#########################

---

Mounting filesystem. To unmount, call:
$ cryfs-unmount "/home/user/mountpoint"

[user@arch30 ~]$ dd if=/dev/urandom of=testfile.dat bs=1M count=100
100+0 Datensätze ein
100+0 Datensätze aus
104857600 Bytes (105 MB, 100 MiB) kopiert, 0,39901 s, 263 MB/s
[user@arch30 ~]$ sync
[user@arch30 ~]$ rsync -a --info=progress2 testfile.dat mountpoint/
104.857.600 100% 4,17MB/s 0:00:23 (xfr#1, to-chk=0/1)
[user@arch30 ~]$ rm /home/user/mountpoint/testfile.dat

FREEZE!

Specifications

• CryFS Version: 0.11.3
• Operating System (incl. Version):
• • Host:Arch Linux 6.2.12-arch1-1 x86_64 GNU/Linux
• • Server with basedir: DietPi (Debian) 5.4.230-odroidxu4 armv7l GNU/Linux