Linux 7.0 embraces rust: a major security upgrade for the kernel

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A milestone release: linux 7.0 arrives

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Linus Torvalds, the legendary creator of Linux, has officially launched version 7.0, marking a significant milestone for the operating system. While the round number itself is notable, the real story lies in a subtle yet profound change within the code. After years of testing, the integration of Rust, a modern programming language, is now a definitive part of the Linux kernel. This represents a substantial shift from the traditional reliance on C, which has been the kernel’s backbone for over three decades.

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The vulnerability of c and rust's solution

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C, while powerful, is known for its potential to introduce memory-related errors – a prime entry point for hackers. These vulnerabilities account for a significant portion of serious security failures. Rust emerges as a safeguard, designed to prevent these kinds of coding blunders that can jeopardize the entire system. This addresses a long-standing concern about the security of the Linux kernel, a critical component of countless systems worldwide.

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A three-year journey to integration

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The initial steps towards enabling the Linux kernel to support Rust began three years ago. Since then, the language has steadily gained popularity within the developer community. The completion of testing signifies a broad endorsement of Rust’s capabilities and its potential to enhance the kernel’s overall robustness. The transition isn't about replacing existing code, but about building a more secure future.

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Miguel ojeda: the key engineer behind the shift

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Miguel Ojeda, a Spanish engineer, has been instrumental in leading this project. He’s the sole maintainer of Rust for Linux, alongside a dedicated team of reviewers. This role has become increasingly important as other key contributors, like Wedson Almeida Filho and Alex Gaynor, have moved on. Ojeda’s commitment underscores the seriousness with which the Linux community views this transition.

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Addressing security concerns and industry pressure

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The adoption of Rust wasn't without its internal debates. Some long-time C purists viewed Rust as an unwelcome intrusion, too modern and complex for the traditional Linux philosophy. However, the undeniable benefits – a dramatic reduction in memory-related vulnerabilities (responsible for roughly 70% of serious security breaches) – have swayed the decision. This move also responds to pressure from major corporations like Google and Microsoft, who rely on the kernel's security for their infrastructures.

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A gradual transition: new code in rust

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It's important to note that this doesn’t mean a mass exodus from C. Millions of lines of existing C code continue to function flawlessly and aren't slated for immediate replacement. The strategy is to prioritize Rust for all new kernel development, ensuring a progressively more secure and resilient system over time. This measured approach balances innovation with stability.

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Rust's growing importance in the tech world

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Rust is rapidly gaining traction as a programming language of choice for developers and tech companies worldwide. Supported by industry giants like Google, Meta, Microsoft, ARM, AWS, and Huawei through the Rust Foundation, it's being deployed in high-performance projects. Its efficiency, speed, and flexibility, particularly when combined with appropriate libraries, have made it a powerful tool for increasing developer productivity, even surpassing C in new project adoption – with estimates suggesting that