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From: "amerey at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/29257] Double free of demangled symbol name
Date: Thu, 23 Jun 2022 16:43:05 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29257

Aaron Merey <amerey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amerey at redhat dot com

--- Comment #5 from Aaron Merey <amerey at redhat dot com> ---
Hi Magne, which version of elfutils are you using? I was only able to repro=
duce
this using an older package (elfutils-debuginfod-client-0.186-1.fc35.x86_64)
that uses 000-permission files to represent negative-cache-hits. When you u=
sed
touch to create the file it didn't have 000 permissions, so debuginfod retu=
rns
an empty file to gdb as if it's valid. Without manually adding the cache fi=
le
this situation should not occur.

More recent versions of debuginfod use empty files to represent
negative-cache-hits. In this case I can't reproduce the bug because debugin=
fod
correctly doesn't return the empty file to gdb.

(It looks like F36 contains an update version of elfutils-debuginfod-client=
 but
F35 still provides an older 000-permisssion build, we should probably update
F35's elfutils-debuginfod-client.)

--=20
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