GNU C Library master sources branch master updated. glibc-2.16-ports-merge-482-gb741de2

[siddhesh at sourceware dot org]

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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=b741de23e214763ba4ffcd95829315dd315897ea

commit b741de23e214763ba4ffcd95829315dd315897ea
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Thu Oct 18 08:25:03 2012 +0530

    Add note on free list pointers overwriting M_PERTURB bytes
    
    Fixes BZ #12140.

diff --git a/ChangeLog b/ChangeLog
index 21857af..dd3d301 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-10-18  Siddhesh Poyarekar  <siddhesh@redhat.com>
+
+	[BZ #12140]
+	* manual/memory.texi (Malloc Tunable Parameters): Add note
+	about free list pointers overwriting some perturb bytes.
+	Wording suggested by Roland McGrath.
+
 2012-10-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* math/libm-test.inc (gamma_test): Do not call feclearexcept.
diff --git a/NEWS b/NEWS
index 9526702..80402e6 100644
--- a/NEWS
+++ b/NEWS
@@ -10,13 +10,13 @@ Version 2.17
 * The following bugs are resolved with this release:
 
   1349, 3479, 5044, 5298, 5400, 6530, 6778, 6808, 9685, 9914, 10014, 10038,
-  10631, 11438, 11607, 13412, 13542, 13629, 13679, 13696, 13717, 13741,
-  13939, 13966, 14042, 14090, 14150, 14151, 14154, 14157, 14166, 14173,
-  14195, 14237, 14251, 14252, 14283, 14298, 14303, 14307, 14328, 14331,
-  14336, 14337, 14347, 14349, 14376, 14417, 14459, 14476, 14477, 14505,
-  14510, 14516, 14518, 14519, 14530, 14532, 14538, 14543, 14544, 14545,
-  14557, 14562, 14568, 14576, 14579, 14583, 14587, 14602, 14621, 14638,
-  14645, 14648, 14652, 14660, 14661, 14716.
+  10631, 11438, 11607, 12140, 13412, 13542, 13629, 13679, 13696, 13717,
+  13741, 13939, 13966, 14042, 14090, 14150, 14151, 14154, 14157, 14166,
+  14173, 14195, 14237, 14251, 14252, 14283, 14298, 14303, 14307, 14328,
+  14331, 14336, 14337, 14347, 14349, 14376, 14417, 14459, 14476, 14477,
+  14505, 14510, 14516, 14518, 14519, 14530, 14532, 14538, 14543, 14544,
+  14545, 14557, 14562, 14568, 14576, 14579, 14583, 14587, 14602, 14621,
+  14638, 14645, 14648, 14652, 14660, 14661, 14716.
 
 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
   Optimized versions of memcpy, memset, and memcmp added for System z10 and
diff --git a/manual/memory.texi b/manual/memory.texi
index fba3a2c..5b14aa6 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -706,7 +706,10 @@ to zero disables all use of @code{mmap}.
 If non-zero, memory blocks are filled with values depending on some
 low order bits of this parameter when they are allocated (except when
 allocated by @code{calloc}) and freed.  This can be used to debug the
-use of uninitialized or freed heap memory.
+use of uninitialized or freed heap memory.  Note that this option does not
+guarantee that the freed block will have any specific values.  It only
+guarantees that the content the block had before it was freed will be
+overwritten.
 @end table
 
 @end deftypefun

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

Summary of changes:
 ChangeLog          |    7 +++++++
 NEWS               |   14 +++++++-------
 manual/memory.texi |    5 ++++-
 3 files changed, 18 insertions(+), 8 deletions(-)


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