[Whonix-devel] Bug#921163: coreutils such as /bin/mkdir are duplicated in /usr/bin/mkdir

Patrick Schleizer adrelanos at riseup.net
Sat Feb 2 15:05:00 CET 2019

Package: mmdebstrap
Severity: normal
X-Debbugs-CC: whonix-devel at whonix.org

Dear maintainer,

# How to reproduce:

sudo mmdebstrap --mode=root
--aptopt=/home/user/whonix_binary/aptgetopt.conf stretch

(Could probably simplified but I hope you can reproduce this easily /
hope you also have usr/bin/mkdir.)

# Expected result:

base.cow/bin/mkdir exists.

base.cow/usr/bin/mkdir does not exist

# Actual result:

base.cow/bin/mkdir exists.

base.cow/usr/bin/mkdir exists.

base.cow/usr/bin/mkdir matches base.cow/bin/mkdir.

diff base.cow/usr/bin/mkdir base.cow/bin/mkdir ; echo $?

Also many (if not all) other coreutils that should only reside in /bin
such as /bin/rm are duplicated in /usr/bin such as /usr/bin/rm.

# Why this is a problem:

/usr/bin is preferred over /bin with default $PATH setting.

- When coreutils is later updated, it will only update /bin/mkdir and so
forth but not /usr/bin/mkdir. This is because /bin/mkdir is owned by
coreutils (dpkg -S /bin/mkdir) but /usr/bin/mkdir is owned by no package
(dpkg -S /usr/bin/mkdir).

- This leads to apparmor issues. In apparmor profiles one has to
hardcode for example /bin/mkdir but since /usr/bin/mkdir exists, this
call will be denied.

# Misc:

I couldn't figure out from the source code why this is happening.
Intended or unintended behavior? If intended, can this be turned off?
Are also other files in unusual places?

Kind regards,

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