[Bug dynamic-link/14055] New: _dl_show_auxv may cause out-of-bounds access and crash

["ppluzhnikov at google dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14055

             Bug #: 14055
           Summary: _dl_show_auxv may cause out-of-bounds access and crash
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
        AssignedTo: unassigned@sourceware.org
        ReportedBy: ppluzhnikov@google.com
    Classification: Unclassified


Created attachment 6387
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6387
proposed patch

Original report:
http://sourceware.org/ml/libc-alpha/2012-04/msg01201.html

In _dl_show_auxv(), when handling unknown a_type values, auxvars[] could
be accessed out of bounds and cause a crash.

Attached patch fixes that.

Tested on Linux/x86_64, no regressions.

Google ref: b/6412609

Patch has been approved:
http://sourceware.org/ml/libc-alpha/2012-05/msg00055.html
and will be committed shortly.

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