A critical OpenZFS bug: how a trivial error caused devastating consequences
By
r4um
Fresh out the oven, still warm. Top of the tray.
Summary
The article describes a critical bug discovered and fixed in OpenZFS, a popular filesystem. The bug involves a function that converts between allocated and physical sizes in the storage IO pipeline. The author explains that the bug was both trivial in nature and devastating in impact, potentially causing data corruption or system instability. The article also touches on how the bug was introduced by human error and discusses Rust's potential role in preventing such memory safety issues in systems programming.
Key quotes
· 3 pulledSuffice to say, it is both trivial and devastating.
In OpenZFS, any single piece of data we write has three notions of 'size'
Take a moment to find it yourself, if you like.
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