Re: [PATCH] slab: Saturate to SIZE_MAX for allocation size overflows

[Matthew Wilcox]

On Tue, Feb 24, 2026 at 05:40:02PM -0800, Kees Cook wrote:
> +++ b/include/linux/slab.h
> @@ -1105,7 +1105,7 @@ static inline __alloc_size(1, 2) void *kmalloc_array_noprof(size_t n, size_t siz
>  	size_t bytes;
>  
>  	if (unlikely(check_mul_overflow(n, size, &bytes)))
> -		return NULL;
> +		bytes = SIZE_MAX;
>  	return kmalloc_noprof(bytes, flags);

Wouldn't this be better written as:

	return kmalloc_noprof(size_mul(n, size), flags);

(etc)