Re: mc 4.8.19: segfaults while searching for contents

[Michael Tremer <michael.tremer@ipfire.org>]

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Hi,

this doesn't have anything to do with PaX. It's just a bug in mc.

Probably has this problem with files that have the SUID bit set?!

Did you try to update mc?

-Michael

On Tue, 2017-10-03 at 09:24 +0200, Matthias Fischer wrote:
> Hi,
> 
> On 03.10.2017 08:50, Matthias Fischer wrote:
> > ...
> > 
> > Suddenly 'mc 4.8.19' starts throwing segfaults...
> > 
> > ...
> 
> This is weird.
> 
> As soon as directory (e.g. '/usr/local/bin') contains the file
> 'ipfirereboot', 'mc' crashes while searching for content 'flush' (e.g.).
> 
> Thus, I would say, 'mc' has problems searching in (specific) binaries -
> searching in '/usr/bin' has the same effect.
> 
> And:
> 
> The following 'paxctl'-options had NO effect:
> 
> ...
> root(a)ipfire: /usr/bin # paxctl -v /usr/bin/mc
> PaX control v0.9
> Copyright 2004,2005,2006,2007,2009,2010,2011,2012,2014 PaX Team
> <pageexec(a)freemail.hu>
> 
> - PaX flags: -p-s-m-x-e-- [/usr/bin/mc]
>         PAGEEXEC is disabled
>         SEGMEXEC is disabled
>         MPROTECT is disabled
>         RANDEXEC is disabled
>         EMUTRAMP is disabled
> ...
> 
> Searching in text-only files is ok, but as soon as directory contains
> the above file (or something similar), 'mc' crashes.
> 
> This does NOT happen on my devel with 'mc 4.8.15'... ;-)
> 
> Best,
> Matthias

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