[Bug libc/13113] New: issues with libc being loaded twice when using audit library

[Bug libc/13113] New: issues with libc being loaded twice when using audit library

[jolsa at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13113

             Bug #: 13113
           Summary: issues with libc being loaded twice when using audit
                    library
           Product: glibc
           Version: 2.14
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: jolsa@redhat.com
    Classification: Unclassified


When running binary with audit library, the libc shared library is loaded
twice within the process.

It appears thats one time for binary namespace binary and second in namespace
for audit library. This is probably intended, not sure..

However this gets me to the dead end when I unwind stack from within
the audit library. The dl-iterate function gets me only libraries
from audit namespace.

And when I hit a function address from within the libc library loaded for
the binary I'm stuck, since I dont have any information about this library.
(eh_frame/debug_frame info).

So I'm not sure what should be fixed here..
* having 2 libc libraries loaded at the same time
* having dl-iterate to return info about all namespaces
* me ;)

please let me know if I can give you any other info/test/debug..

thanks for any ideas

jirka

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[Bug libc/13113] issues with libc being loaded twice when using audit library

[jolsa at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13113

--- Comment #1 from Jiri Olsa <jolsa at redhat dot com> 2011-08-19 14:10:23 UTC ---
forgot to mention I also need following fixies:
(I did not get any answer on the list so far)

http://sources.redhat.com/ml/libc-alpha/2011-07/msg00134.html
http://sources.redhat.com/ml/libc-alpha/2011-08/msg00064.html

thanks

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[Bug ld.so|libdl/13113] issues with libc being loaded twice when using audit library

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13113

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|libc                        |ld.so|libdl

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[Bug ld.so|libdl/13113] issues with libc being loaded twice when using audit library

[jolsa at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13113

--- Comment #2 from Jiri Olsa <jolsa at redhat dot com> 2012-02-21 08:33:57 UTC ---
any feedback? ;) thanks

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[Bug dynamic-link/13113] issues with libc being loaded twice when using audit library

[schwab@linux-m68k.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13113

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|drepper.fsp at gmail dot    |unassigned at sourceware
                   |com                         |dot org

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[Bug dynamic-link/13113] issues with libc being loaded twice when using audit library

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13113

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug dynamic-link/13113] issues with libc being loaded twice when using audit library

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13113

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING
                 CC|                            |fweimer at redhat dot com

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
The _dl_find_object function reaches across namespaces and should fix this once
libgcc_s uses it (so GCC 12 or later built against glibc 2.35 or later).

Does this issue persist?

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