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0 pointsakira25012y ago0 comments

> or make assignments not be an expression,

Or just reverse the expression:

    0 == curent->uid

So that the bug case is an error:

    0 = current->uid

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3 comments · 1 top-level

layer82y ago· 2 in thread

Yes, that is well known, but it doesn’t prevent the issue in TFA.

How does it not? Applied literally to the article, it would have turned this backdoor into a compile time error.

Because you can’t trust the person backdooring your code to help you out by writing in this style.

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