gdb and binutils branch master updated. b9502d3fd7848cd4d843be8bdc28633a3d24438d

[willnewton@sourceware.org]

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b9502d3fd7848cd4d843be8bdc28633a3d24438d

commit b9502d3fd7848cd4d843be8bdc28633a3d24438d
Author: Will Newton <will.newton@linaro.org>
Date:   Fri Nov 1 14:14:50 2013 -0700

    gdb/dwarf2read.c: Sanity check DW_AT_sibling values.
    
    When reading objects with corrupt debug information it is possible that
    the sibling chain can form a loop, which leads to an infinite loop and
    memory exhaustion.
    
    Avoid this situation by disregarding and DW_AT_sibling values that point
    to a lower address than the current entry.
    
    gdb/ChangeLog:
    
    2013-11-06  Will Newton  <will.newton@linaro.org>
    
    	PR gdb/12866
    	* dwarf2read.c (skip_one_die): Sanity check DW_AT_sibling
    	values.  (read_partial_die): Likewise.

-----------------------------------------------------------------------

Summary of changes:
 gdb/ChangeLog    |    6 ++++++
 gdb/dwarf2read.c |   22 ++++++++++++++++++++--
 2 files changed, 26 insertions(+), 2 deletions(-)


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