Re: Another possible LTO failure in guestfish (or maybe readline)

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On Fri, Jul 31, 2020 at 10:55:15AM -0600, Jeff Law wrote:
> On Fri, 2020-07-31 at 14:07 +0200, Florian Weimer wrote:
> > * Richard W. M. Jones:
> > 
> > > Here's another one:
> > > 
> > >   $ rpm -qf /usr/bin/guestfish /lib64/libreadline.so.8
> > >   libguestfs-tools-c-1.43.1-2.fc33.x86_64
> > >   readline-8.0-5.fc33.x86_64
> > >   $ guestfish --version
> > >   Segmentation fault (core dumped)
> > > 
> > >   (gdb) bt
> > >   #0  0x0000000000000000 in  ()
> > >   #1  0x00007f3212b72dad in history_filename
> > >       (filename=0x5592dd41bfa0 "/home/rjones/.guestfish") at ../histfile.c:152
> > >   #2  0x00007f3212b75e2d in read_history_range
> > >       (filename=<optimized out>, from=0, to=-1) at ../histfile.c:280
> > >   #3  0x00005592dd33e646 in main ()
> > > 
> > > It also caused a build failure of another package in Koji
> > > (search the logs for "ext2.img] Segmentation fault (core dumped)"):
> > > 
> > >   https://koji.fedoraproject.org/koji/taskinfo?taskID=48245041
> > > 
> > > I suspect the problem isn't in readline but is in the main package,
> > > mainly because I tried an older readline and that failed in the same
> > > way.
> > 
> > This looks like the ld bug producing incorrect absolute symbols:
> > 
> > $ eu-readelf --symbols=.dynsym usr/bin/guestfish  | grep -w ABS
> >   790: 0000000000000000     54 FUNC    GLOBAL DEFAULT      ABS xrealloc
> >   791: 0000000000000000     35 FUNC    GLOBAL DEFAULT      ABS xmalloc
> >   799: 0000000000000000   1294 FUNC    GLOBAL DEFAULT      ABS locale_charset
> > 
> > <https://sourceware.org/bugzilla/show_bug.cgi?id=26314>
> > 
> > I believe a fix for that is on its way to rawhide.
> Yup.  binutils with the ld fix is nearly done building (just waiting on s390x).
>  I'll have my eye on things today in case there's further fallout.
> 
> So Richard, wait for binutils-2.35.8 to hit the buildroots, respin guestfish and
> we should be good.

No problem, will test when it arrives.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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