linux-kernel - Re: [PATCH] coredump: Also dump first pages of non-executable ELF libraries

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Date:   Fri, 4 Feb 2022 14:44:31 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Jann Horn <jannh@...gle.com>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org,
        Bill Messmer <wmessmer@...rosoft.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Randy Dunlap <rdunlap@...radead.org>, stable@...r.kernel.org,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] coredump: Also dump first pages of non-executable ELF
 libraries

On Fri, 4 Feb 2022 00:59:59 +0100 Jann Horn <jannh@...gle.com> wrote:

> > > I looked in the history and the code was filtering for ELF headers
> > > there already.  I am just thinking this feels like a good idea
> > > regardless of the file format to help verify the file on-disk
> > > is the file we think was mapped.
> >
> > Yeah, I guess that's reasonable. The main difference will probably be
> > that the starting pages of some font files, locale files and python
> > libraries will also be logged.
> 
> Are you planning to turn that into a proper patch and take it through
> your tree, or something like that? If so, we should tell akpm to take
> this one back out...

I have
coredump-also-dump-first-pages-of-non-executable-elf-libraries.patch on
hold, pending outcome of this discussion.