0xDEADBEEF?

While reading a report, I saw where 0xDEADBEEF is used in Linux Kernel to assign a variable, null. TIL that this hexa value is used to assign a variable to null.

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Faults in Linux: Not checking for Null before dereferencing

As part of my project, while reading the reports, I came to know about bugs of type which were not checking for null before derefencing.  There were many in the versions 2.4.x and 2.6.x. I was also required to list FPs (false positives) by Coccinelle. This post will be about, what I found for the case of NULL return values are tested before being derferenced or not?

You can view the complete report as a PDF here and as a HTML file here.

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Debugging Memory Leaks using Valgrind

Valgrind is a tool for memory debugging, memory leak detection, and profiling. It is named after the main entrance to Valhalla.

Valgrind was originally designed to be a free memory debugging tool for Linux on x86, but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers.

This post is about using Valgrind to debug memory leaks.

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