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heap allocation canaries #14
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thestinger
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Type: enhancement
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Aug 19, 2015
thestinger
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Aug 21, 2015
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Aug 21, 2015
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There's now an initial implementation of this. |
thestinger
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Aug 22, 2015
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Component: hardened malloc
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Feb 6, 2016
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thestinger commentedAug 19, 2015
It would be nice to have a setting for adding a random canary after small allocations. The allocator already has significantly lower metadata overhead than a dlmalloc-style allocator so it could potentially even be enabled by default. This could be used to completely mitigate small heap overflow vulnerabilities (1 to 16 byte overflows) and it would help to catch other kinds of heap corruption.