Bug 1870557

Summary:	invalid free in SWIG_Python_AddErrMesg
Product:	Red Hat Enterprise Linux 8	Reporter:	Jaroslav Rohel <jrohel>
Component:	swig	Assignee:	Jitka Plesnikova <jplesnik>
Status:	CLOSED ERRATA	QA Contact:	Jakub Heger <jheger>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.2	CC:	bnater, jorton, jplesnik
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	8.4
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 15:20:26 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jaroslav Rohel 2020-08-20 11:05:58 UTC

Description of problem:
I investigated covscan results of libdnf and there was a message:
incorrect_free: "free" frees incorrect pointer "(void *)tmp".
#  2856|   	PyErr_Format(type, "%s %s", tmp, mesg);
#  2857|         }
#  2858|->       SWIG_Python_str_DelForPy3(tmp);
#  2859|         Py_DECREF(old_str);
#  2860|       }

There is a bug in SWIG.
I found that the bug was fixed 2 years ago https://github.com/swig/swig/commit/142d4062df56aa3a6dd74b06e86700d95421b774 .

Actual results:
Buggy code generated.

Expected results:
Fixed SWIG (upgrade/backported patch).

Comment 1 Jitka Plesnikova 2020-08-20 12:25:23 UTC

Thank you for the report. 

I am preparing SWIG 4, which contains the fix, for RHEL 8.4.

Comment 13 errata-xmlrpc 2021-05-18 15:20:26 UTC

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 (new module: swig:4.0), 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/RHEA-2021:1755