Re: [PATCH v3] binfmt_elf: Dump smaller VMAs first in ELF cores

[Linus Torvalds <torvalds@linux-foundation.org>]

On Fri, 9 Aug 2024 at 07:40, Eric W. Biederman <ebiederm@xmission.com> wrote:
>
> I asked him to perform this at snapshot time.  Plus it is obvious at
> snapshot time that you can change the allocated array, while it is
> not so obvious in the ->core_dump methods.

Fair enough. The days when we supported a.out dumps are obviously long
long gone, and aren't coming back.

So I am not adamant that it has to be done in the dumper, and I
probably just have that historical "we have multiple different dumpers
with different rules" mindset that isn't really relevant any more.

> I would argue that the long term maintainable thing to do is to
> merge elf_core_dump and elf_fdpic_core_dump and put all of the code
> in fs/coredump.c

I wouldn't object. It's not like there's any foreseeable new core dump
format that we'd expect, and the indirection makes the code flow
harder to follow.

Not that most people look at this code a lot.

             Linus