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BUG: 64-bit argument comparisons do not work correctly (CVE-2019-9893) #139

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@pcmoore

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@pcmoore

Jann Horn reported a problem with libseccomp where our approach to doing 64-bit comparisons using 32-bit operators was just plain wrong, leading to a number of potential problems with filters that used the LT, GT, LE, or GE operators.

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