Re: [PATCH] add /proc/*/pmap files

[Arjan van de Ven <arjan@infradead.org>]

On Sun, 2006-01-22 at 14:17 -0500, Albert Cahalan wrote:
> On 1/22/06, Arjan van de Ven <arjan@infradead.org> wrote:
> > On Sun, 2006-01-22 at 04:50 -0500, Albert Cahalan wrote:
> > > This adds a few things needed by the pmap command.
> > > They show up in /proc/*/pmap files.
> >
> >
> > also since this shows filenames and such, could you make the permissions
> > of the pmap file be 0400 ? (yes I know some others in the same dir
> > aren't 0400 yet, but I hope that that can be changed in the future,
> > adding more of these should be avoided for information-leak/exposure
> > reasons)
> 
> I thought it was the addresses you'd object to.

well both ;)

knowing that you're listening to Mrs Stefani's music rather than
watching her music clips is something you might not want to spread to
other users of your system. Or in other words, open files already
disclose "private" stuff. 

> I notice that Fedora Core 4 shipped with /proc/*/smaps
> files that were readable, but /proc/*/maps files that were
> not readable. (at least, a recent kernel update did)

that'd be a mistake


> As of now, I'm keeping mainstream kernel policy as is.

you're making a NEW file, so there is no "mainstream policy" yet. Please
do it right the first time so that it doesn't have to change later...