Quoting Doug Anderson (2021-01-05 15:06:35) > Hi, > > On Tue, Dec 15, 2020 at 11:19 PM Stephen Boyd <swb...@chromium.org> wrote: > > > > There doesn't seem to be any reason to limit this to only root user > > readable. Let's make it readable by all so that random programs can > > read the debugfs files in here instead of just root. The information is > > just that, informational, so this is fine. > > > > Cc: Sai Prakash Ranjan <saiprakash.ran...@codeaurora.org> > > Cc: Douglas Anderson <diand...@chromium.org> > > Cc: Dmitry Baryshkov <dmitry.barysh...@linaro.org> > > Signed-off-by: Stephen Boyd <swb...@chromium.org> > > --- > > drivers/soc/qcom/socinfo.c | 40 +++++++++++++++++++------------------- > > 1 file changed, 20 insertions(+), 20 deletions(-) > > One worry I'd have is whether there would ever be any PII (personally > identifiable information) here, like maybe a chip serial number. If > so, is that something that is OK to provide to any random process? > ...maybe I'm just being paranoid though, since presumably there are > enough random HW characteristics that could be strung together and > hashed to make roughly a unique ID anyway and hiding every HW > characteristic would be a bit extreme... >
I suppose if that's a problem then the process that mounts debugfs can change the access to restrict it. I'm not aware of this needing to be a kernel policy though, so I'd rather leave that up to userspace to decide if it should be restricted further.
