On 02/21/2018 09:15 AM, Khalid Aziz wrote:
> +#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
> +static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
> +{
> + if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_ADI))
> + return 0;
> + if (prot & PROT_ADI) {
> + if (!adi_capable())
> + return 0;
> +
> + if (addr) {
> + struct vm_area_struct *vma;
> +
> + vma = find_vma(current->mm, addr);
> + if (vma) {
> + /* ADI can not be enabled on PFN
> + * mapped pages
> + */
> + if (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))
> + return 0;
You don't hold mmap_sem here. How can this work?
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