Bug 2167453

Summary: gzip --list misinterprets the correct uncompressed size for large file sizes on RHEL8
Product: Red Hat Enterprise Linux 8 Reporter: Ameya Patil <amepatil>
Component: gzipAssignee: Jakub Martisko <jamartis>
Status: CLOSED MIGRATED QA Contact: qe-baseos-daemons
Severity: medium Docs Contact:
Priority: unspecified    
Version: 8.7Keywords: MigratedToJIRA
Target Milestone: rcFlags: pm-rhel: mirror+
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Hardware: All   
OS: Linux   
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Last Closed: 2023-09-20 23:13:33 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Ameya Patil 2023-02-06 16:37:24 UTC
Description of problem:

One of our customer found that On RHEL8, when running gzip --list on a large compressed file (multi-GB), it misinterprets the uncompressed filesize:

On RHEL8, when running gzip --list on a large compressed file (multi-GB), it misinterprets the uncompressed filesize:
~~~
$ gzip --list rhel9.tar.gz
         compressed        uncompressed  ratio uncompressed_name
         8262683410          4279486464 -93.1% rhel9.tar
$ cat /etc/redhat-release
Red Hat Enterprise Linux release 8.6 (Ootpa)
~~~

The same command on RHEL9 works fine:
~~~
# gzip --list rhel9.tar.gz
         compressed        uncompressed  ratio uncompressed_name
         8262683410          8574453760   3.6% rhel9.tar
# cat /etc/redhat-release
Red Hat Enterprise Linux release 9.1 (Plow)
~~~

Customer has listed this was fixed in the upstream gzip in this commit and want this to be implemented in RHEL 8: 
https://git.savannah.gnu.org/cgit/gzip.git/commit/?id=cf26200380585019e927fe3cf5c0ecb7c8b3ef14


Version-Release number of selected component (if applicable):
gzip-1.9-13.el8_5.x86_64


How reproducible:
Everytime


Steps to Reproduce:
1. REAL file
~~~
# ls -la rhel8.tar 
-rw-r--r--. 1 root root 11465134080 Feb  3 05:35 rhel8.tar
~~~

2. RHEL 8 GZIP latest version - gzip-1.9-13.el8_5.x86_64
~~~
# gzip --list rhel8.tar.gz 
         compressed        uncompressed  ratio uncompressed_name
        11024697867          2875199488 -283.4% rhel8.tar
~~~

3. RHEL 9 GZIP latest version - gzip-1.12-1.el9.x86_64
~~~
# gzip --list rhel8.tar.gz 
         compressed        uncompressed  ratio uncompressed_name
        11024697867         11465134080   3.8% rhel8.tar
~~~


Actual results:
The uncompressed size show is much smaller causing a negative compression ratio.
Users cannot rely on the information provided by the utility and have to develop workarounds


Expected results:
Should display correct uncompressed file size.


Additional info:

Comment 3 RHEL Program Management 2023-09-20 23:12:42 UTC
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 4 RHEL Program Management 2023-09-20 23:13:33 UTC
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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