Re: [PATCH] iomap: Fix overflow in iomap_page_mkwrite

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On Wed, Nov 06, 2019 at 08:34:26PM +0100, Andreas Gruenbacher wrote:
> On Wed, Nov 6, 2019 at 8:17 PM Darrick J. Wong <darrick.wong@xxxxxxxxxx> wrote:
> > On Wed, Nov 06, 2019 at 08:04:00PM +0100, Andreas Gruenbacher wrote:
> > > On architectures where ssize_t is wider than pgoff_t, the expression
> >
> > ssize_t?  But you're changing @offset, which is loff_t.   I'm confused.
> 
> Oops, should have been loff_t instead of ssize_t.

I'll fix it on commit.

> > Also, which architectures are you talking about here?
> 
> From the kernel headers:
> 
> #define pgoff_t unsigned long
> typedef long long __kernel_loff_t;
> typedef __kernel_loff_t loff_t;
> 
> So for example, sizeof(loff_t) > sizeof(pgoff_t) on x86.

Ok, that's what I thought.

Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> Thanks,
> Andreas
> 



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