https://sourceware.org/bugzilla/show_bug.cgi?id=29255
Bug ID: 29255
Summary: A Potential Memory Leak Bug
Product: binutils
Version: 2.34
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: 1157401338 at qq dot com
Target Milestone: ---
Created attachment 14146
--> https://sourceware.org/bugzilla/attachment.cgi?id=14146&action=edit
diagram of memory leak bug
Hi, I found a potential memory leak bug in the project source code of binutils,
and I have shown the execution sequence of the program that may have generated
the bug on a diagram,which is added to the attachment
The red text illustrates the steps that created the bug
the red arrows represent the call relationships
the green text illustrates the file and function where the code snippet is
located below the green text.
In short, the key to the bug is the fourth and fifth steps in the diagram. The
return value of the function called in the fourth step points to dynamically
allocated memory, which should normally be further returned to the function
caller, however, when the return value of the mkdir function is not equal to 0,
the handling of the case simply returns the null pointer, and the dynamically
allocated memory is then leaked, as shown in the diagram demonstrates. A free
operation should be performed on tmpname when mkdir fails, to avoid memory
leaks.
I look forward to your reply and thank you very much for your patience!
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