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2506e2e267
Introduce mallocarray() in the kernel Similar to calloc() the mallocarray() function checks for integer overflows before allocating memory. It does not zero memory, unless the M_ZERO flag is set. Additionally, move the overflow check logic out to WOULD_OVERFLOW() for consumers to have a common means of testing for overflowing allocations. WOULD_OVERFLOW() should be a secondary check -- on 64-bit platforms, just because an allocation won't overflow size_t does not mean it is a sane size to request. Callers should be imposing reasonable allocation limits far, far, below overflow. Obtained from: OpenBSD |
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