Re: [PATCH] hugetlbfs: avoid overflow in hugetlbfs_fallocate

[yangerkun <yangerkun@xxxxxxxxxx>]

On 2021/11/24 12:24, Matthew Wilcox wrote:
> On Wed, Nov 24, 2021 at 12:08:18PM +0800, yangerkun wrote:
> >   	start = offset >> hpage_shift;
> > -	end = (offset + len + hpage_size - 1) >> hpage_shift;
> > +	end = ((unsigned long long)offset + len + hpage_size - 1)
> > +		>> hpage_shift;
>
> +	end = DIV_ROUND_UP_ULL(offset + len, hpage_size);

Thanks, will do it in v2!

> .