[Bug dynamic-link/20105] bad version variable in elf_dynamic_do_Rel() elf/do-rel.h (2.23) causes coredump in dl-machine.h elf_machine_rela()

["carlos at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20105

--- Comment #16 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Jason Vas Dias from comment #15)
> I really think the authors of the glibc dynamic linker should rethink
> handling
> of map->l_versions being null fully in both do-rel.h and all the functions
> that
> receive its potentially null version pointer - otherwise I'll have to & will
> post patches back here.

It is false economy to make changes to the fast path of the dynamic loader in
order to diagnose a broken binary. There are other tools that can do this and
better. You must have a working non-corrupt system or the dynamic loader will
fail. There is simply too much in the ELF format that has to be "correct"
otherwise you crash.

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