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Description of problem:


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:

Below is a simple reproduction showing umask difference regression using centos docker images. same holds true for redhat based images.

ashish@BLRMAC57-4 ~ % docker run centos:7 umask             
0022
ashish@BLRMAC57-4 ~ % docker run centos:8 umask             
0022
ashish@BLRMAC57-4 ~ % docker run centos:7 su root -c umask
0022
ashish@BLRMAC57-4 ~ % docker run centos:8 su root -c umask
0077
ashish@BLRMAC57-4 ~ % 




Actual results:
Umask in centos 8 when a command is run under su is 0077

Expected results:
it should be 0022

Additional info:

This breaks defaults permission of files  in 8.x series of os vs 7.x series when a program impersonates a user to write a file.

(In reply to Ashish Kumar Singh from comment #0)

> Below is a simple reproduction showing umask difference regression using
> centos docker images. same holds true for redhat based images.
> 
> ashish@BLRMAC57-4 ~ % docker run centos:7 umask             
> 0022
> ashish@BLRMAC57-4 ~ % docker run centos:8 umask             
> 0022
> ashish@BLRMAC57-4 ~ % docker run centos:7 su root -c umask
> 0022
> ashish@BLRMAC57-4 ~ % docker run centos:8 su root -c umask
> 0077
it's set from /etc/login.defs reassigned to shadow-utils for further investigation

This bug is a duplicate of https://bugzilla.redhat.com/show_bug.cgi?id=1777718, which will be fixed in RHEL8.3.

*** This bug has been marked as a duplicate of bug 1777718 ***