On Wed, Jul 12, 2023 at 12:57:53PM +0100, Ben Dooks wrote: > If we're writing what could be an arbitrary sized string into an attribute > we should probably use sysfs_emit() 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.
Hi Ben, Documentation/process/submitting-patches.rst says: "Don't add "RESEND" when you are submitting a modified version of your patch or patch series - "RESEND" only applies to resubmission of a patch or patch series which have not been modified in any way from the previous submission." I see maybe you are going to go back and use sysfs_emit in all the _show functions. I'd suggest either justify it as either a) or b), Both are more explicit than 'just to be safe' a) following the recommendations of Documentation/filesystems/sysfs.rst which says to only use sysfs_emit in show() functions. b) explain that you are doing it because sprintf does not know the PAGE_SIZE maximum of the temporary buffer used for outputting sysfs content requests and it's possible to overrun the buffer length. I vote for doing 'em all! Alison > > Signed-off-by: Ben Dooks <[email protected]> > --- > v2: > - use sysfs_emit() instead of snprintf. > --- > 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..59c354137627 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 sysfs_emit(buf, "%s\n", nfit_mem->id); > } > static DEVICE_ATTR_RO(id); > > -- > 2.40.1 > >
