[Bug malloc/17581] malloc_usable_size: expected 7 but got 11

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https://sourceware.org/bugzilla/show_bug.cgi?id=17581

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=265cbed8e73b23e3b38ada6cc42482c53a216224

commit 265cbed8e73b23e3b38ada6cc42482c53a216224
Author: James Lemke <jwlemke@codesourcery.com>
Date:   Tue May 19 12:10:26 2015 -0700

    Fix for test "malloc_usable_size: expected 7 but got 11"

    [BZ #17581] The checking chain of unused chunks was terminated by a hash of
        the block pointer, which was sometimes confused with the chunk length
byte.
        We now avoid using a length byte equal to the magic byte.

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

Summary of changes:
 ChangeLog      |    9 ++++++++
 NEWS           |   16 +++++++-------
 malloc/hooks.c |   62 ++++++++++++++++++++++++++++++++++---------------------
 3 files changed, 55 insertions(+), 32 deletions(-)

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