Re: [PATCH 1/1] arm: print alloc free paths for address in registers

[Russell King - ARM Linux admin]

On Wed, Feb 24, 2021 at 06:07:34PM +0530, Maninder Singh wrote:
> +bool slab_page_object(unsigned long address, void **object, struct kmem_cache **cache)
> +{
> +	void *addr = (void *)address;
> +	struct page *page;
> +
> +	if ((addr >= (void *)PAGE_OFFSET) &&
> +			(addr < high_memory)) {
> +		page = virt_to_head_page(addr);

This check is not sufficient. There can be holes in the page array.
You need to use virt_addr_valid() to validate "addr".

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