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.OpenSCAP no longer produces incorrect errors when checking available memory
Previously, when evaluating some XCCDF rules, OpenSCAP incorrectly showed the error message `Failed to check available memory` and produced invalid scan results. For example, this occurred for rules `accounts_user_dot_no_world_writable_programs`, `accounts_user_dot_group_ownership`, and `accounts_users_home_files_permissions`. With this update, the bug in error handling is fixed and the error message appears only for real failures.
Created attachment 1898451[details]
RHEL 9 data stream
Description of problem:
Evaluating certain rules trigger an error message "Failed to check available memory" in OpenSCAP.
Version-Release number of selected component (if applicable):
openscap-1.3.6-3.el9.x86_64
How reproducible:
always
Steps to Reproduce:
1. Build RHEL9 content from upstream https://github.com/ComplianceAsCode/content/ as of HEAD 169b4e8cb5b331aef65375214de2920b3fde6619 (2022-07-21) or download the attachment of this BZ
2. Make sure there is enough word-writable files on your system, or create them artificially:
for x in $(seq 1000) ; do touch file$x; chmod o+w file$x ; done
3. Run scan
sudo oscap xccdf eval --profile 'stig' --rule xccdf_org.ssgproject.content_rule_accounts_user_dot_no_world_writable_programs --results-arf arf.xml ./ssg-rhel9-ds.xml
Actual results:
E: oscap: Failed to check available memory
Expected results:
no error
Additional info:
- other rules can also trigger this error message, eg. accounts_user_dot_group_ownership, accounts_users_home_files_permissions
- the scanner doesn't crash, but validity of produced results is questionable
- also tracked in upstream in https://github.com/OpenSCAP/openscap/issues/1867
There are also additional occurrences of not resetting errno to 0 before strtol() in the OpenSCAP code base and we are going to fix these in https://github.com/OpenSCAP/openscap/pull/1875.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (openscap bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2022:8216