Towards the next generation of XNU memory safety kalloctype
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Towards the next generation of XNU memory safety kalloctype
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Towards the next generation of XNU memory safety kalloctype
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Towards the next generation of XNU memory safety kalloctype upvote comment rhackernews rhackernews A mirror of Hacker News best submissions Members Online Towards the next generation of XNU memory safety kalloctype upvote comment Top Posts
Towards The Next Generation Of Xnu Memory Safety Kalloc Type
Towards the next generation of XNU memory safety kalloctype defensive mitigations find this post to be a helpful case study of what it takes to transform a powerful idea like type isolation into a worldclass implementation that is fast memoryefficient and practical enough to adopt at billiondevice scale The Next Level In
Towards the next generation of XNU memory safety kalloctype
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Towards the next generation of XNU memory safety kalloctype Improving software memory safety is a key security objective for engineering teams across the industry Here we begin a journey into the XNU kernel at the core of iOS and explore the intricate work our engineering teams have done to harden the memory allocator and make our software
Those changes laid the groundwork for kalloctype in iOS 15 which added randomized bucketed type isolation to the zone allocator while iOS 16 and macOS Ventura increased kalloctype adoption throughout the XNU kernel We also discussed the temporal safety properties of kalloctype with a realistic assessment of its strengths and weaknesses
Towards the next generation of XNU memory safety kalloctype Type safety is only using the object as the intended type no reuse of zones but kalloctype has a large amount of buckets that are randomized for each size Additionally the heap metadata for kalloctype is completely in a different section of memory
Towards The Next Generation Of Xnu Memory Safety Kalloc Type
The article references a few compiler extensions builtinxnutypesignature builtinxnutypesummary and the xnuusagesemantics attribute I can see references to these builtins in the latest xnu source1 but not in upstream llvm2 or Apples forks of llvm3 and clang4 Its been possible to build your own XNU5 for a long time
The article references a few compiler extensions builtinxnutypesignature builtinxnutypesummary and the xnuusagesemantics attribute I can see these references to these builtins in the latest xnu source1 but not in upstream llvm2 or Apples forks of llvm3 and clang4 Its been possible to build your own XNU5 for a long time Is that still possible n
Towards the next generation of XNU memory safety kalloctype Hacker News
This series of posts focuses on one specific effort to improve XNU memory safety hardening the memory allocator We first shipped this new hardened allocator called kalloctype in iOS 15 and this year weve expanded its use across our systems
Towards the next generation of XNU memory safety kalloctype
Towards the next generation of XNU memory safety kalloctype