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List:       amarok-bugs-dist
Subject:    =?UTF-8?B?W2FtYXJva10gW0J1ZyA0MTkxMzJdIE5ldzogcG90ZW50aWFsIG1l?= =?UTF-8?B?bW9yeSBsZWFrYWdlOiBmb3JnZ
From:       bugzilla_noreply () kde ! org
Date:       2020-03-23 8:19:35
Message-ID: bug-419132-71684 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=419132

            Bug ID: 419132
           Summary: potential memory leakage: forget using libxml2 API
                    'xmlXPathFreeContext‘ after 'xmlXPathNewContext'
           Product: amarok
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Tools/Statistics Synchronization
          Assignee: amarok-bugs-dist@kde.org
          Reporter: summerlinasity@gmail.com
  Target Milestone: kf5

SUMMARY
I found this issue when reading source code in the file
'src/services/mp3tunes/libmp3tunes/locker.c'.

STEPS TO REPRODUCE
1. first, there are 2 functions using libxml2 API: the defined xml_xpath_init()
in 84 line uses API 'xmlXPathNewContext', the defined xml_xpath_deinit() in 119
line uses API 'xmlXPathFreeContext'.
2. the second usage of xml_xpath_init() in this c file lies in 422 line, inside
the defined function mp3tunes_locker_api_post_fetch()
3. then mp3tunes_locker_api_post_fetch() is used in line 1391. After it,
xml_xpath_deinit() is not called to free 'result->xpath_ctx' while free() is
used directly to free 'result'.
So the unfree 'result->xpath_ctx' memory is leaked.

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

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