[Bug gdb/15174] New: gdb run as root: untrusted .gdbinit causesmalloc arena corruption crash

["bugz at barachs dot net" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15174

             Bug #: 15174
           Summary: gdb run as root: untrusted .gdbinit causes malloc
                    arena corruption crash
           Product: gdb
           Version: 7.5
            Status: NEW
          Severity: minor
          Priority: P2
         Component: gdb
        AssignedTo: unassigned@sourceware.org
        ReportedBy: bugz@barachs.net
    Classification: Unclassified


Created attachment 6888
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6888
Full backtrace

When running gdb as root, the existence of ~/.gdbinit (untrusted) causes gdb to
crash with a duplicate free or other heap corruption.

Workaround: "mv ~/.gdbinit ~/gdbinit".

See attachment for full backtrace. 

# gdb xxx
GNU gdb (GDB) 7.5-ubuntu
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...

warning: not using untrusted file "/users/joeuser/.gdbinit"
*** glibc detected *** /usr/bin/gdb: double free or corruption (!prev):
0x0000000000f25940 ***

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