Re: [PATCH] ACPI: NFIT: limit string attribute write

[Ben Dooks]

On 05/07/2023 19:34, Dave Jiang wrote:
> On 7/4/23 01:17, Ben Dooks wrote:
> > If we're writing what could be an arbitrary sized string into an 
> > attribute
> > we should probably use snprintf() just to be safe. Most of the other
> > attriubtes are some sort of integer so unlikely to be an issue so not
> > altered at this time.
> >
> > Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
> > ---
> >   drivers/acpi/nfit/core.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
> > index 9213b426b125..d7e9d9cd16d2 100644
> > --- a/drivers/acpi/nfit/core.c
> > +++ b/drivers/acpi/nfit/core.c
> > @@ -1579,7 +1579,7 @@ static ssize_t id_show(struct device *dev,
> >   {
> >       struct nfit_mem *nfit_mem = to_nfit_mem(dev);
> > -    return sprintf(buf, "%s\n", nfit_mem->id);
> > +    return snprintf(buf, PAGE_SIZE, "%s\n", nfit_mem->id);
>
> Why not just convert it to sysfs_emit()?

I'll look into that.

--
Ben Dooks				http://www.codethink.co.uk/
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