struct xt_table_info *xt_alloc_table_info(unsigned int size)
{
 	struct xt_table_info *info = NULL;
 	size_t sz = sizeof(*info) + size;
 
	if (sz < sizeof(*info))
		return NULL;

 	/* Pedantry: prevent them from hitting BUG() in vmalloc.c --RR */
 	if ((SMP_ALIGN(size) >> PAGE_SHIFT) + 2 > totalram_pages)
 		return NULL;

	if (sz <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER))
		info = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
	if (!info) {
		info = vmalloc(sz);
		if (!info)
			return NULL;
	}
	memset(info, 0, sizeof(*info));
	info->size = size;
	return info;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.