New subject: [Bug 56567] There is a memory leak defect at line 580 of the file "/wine/tools/widl/write_msft.c".

16 Apr 2024


      https://bugs.winehq.org/show_bug.cgi?id=56567
Bug ID: 56567
           Summary: There is a memory leak defect at line 580 of the file
                    "/wine/tools/widl/write_msft.c".
           Product: Wine
           Version: 9.6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs@winehq.org
          Reporter: lumingying@bupt.edu.cn
      Distribution: ---
The trigger path of the defect:
1.In line 573 of the /wine/tools/widl/write_msft.c file, a pointer variable
named encoded_string is defined. This pointer variable is passed as an argument
to the function CTL2_ENCODE_STRING on line 575, which allocates a dynamic
memory area, as shown in the following figure:
https://github.com/LuMingYinDetect/wine_defects/blob/main/wine_8.png
2.The role of ctl2_encode_string is to allocate a new dynamic memory area.
Specifically, a pointer variable named converted_string is defined on line 329.
The converted_string pointer variable allocates a dynamic memory area through
the xmalloc function on line 336, and is assigned to the function parameter
result (i.e., the incoming encoded_string variable) on line 348, as shown in
the following figure:
https://github.com/LuMingYinDetect/wine_defects/blob/main/wine_9.png
3.After the execution of ctl2_encode_string is completed, the variable
encoded_string is allocated a dynamic memory area. When the if statement on
line 580 of the program is true, the program will return, thus preventing the
execution of the operation to release the dynamic memory area pointed to by
encoded_string on line 587. This results in a memory leak defect, as shown in
the following figure.
https://github.com/LuMingYinDetect/wine_defects/blob/main/wine_10.png
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[Bug 56567] New: There is a memory leak defect at line 580 of the file "/wine/tools/widl/write_msft.c".