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posted by martyb on Thursday September 06 2018, @03:28PM   Printer-friendly
from the Security-is-hard,-mmmmkay? dept.

Back when Intel introduced the 80286, they didn't quite document everything right away. Errata were needed. Then the 80386 changed things. And then someone convinced them to add just one more feature at the last minute, which didn't get documented properly again.

The History of a Security Hole takes a look at the problems introduced by the I/O Permission Bitmap (IOPB) in the 80286, and how fallout from the implementation caused a security hole in all versions of OpenBSD up to 6.3 and NetBSD up to 4.4.

Conclusion? This programming thing is hard.


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  • (Score: 2) by driverless on Thursday September 06 2018, @07:23PM

    by driverless (4770) on Thursday September 06 2018, @07:23PM (#731478)

    What if different compilers pack your structs differently?

    (TSA would not approve)

    Should be OK, as long as there are no liquid elements, or folding struct members longer than 2.36 inches.

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