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Initialize wide struct info.

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Fixes 15381.

Using wide character function is on byte oriented memstream is undefined
behaviour.  This behaviour was masked by not initializing wide struct
info. We now initialize it to cause a predictable crash.
This commit is contained in:
Ondrej Bilka 2013-05-24 08:34:10 +02:00
parent d4ea44a04b
commit bae143d270
3 changed files with 12 additions and 3 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2013-05-24 Ondřej Bílka <neleai@seznam.cz>
[BZ #15381]
* libio/genops.c (_IO_no_init): Initialize wide struct info.
2013-05-23 Edjunior Machado <emachado@linux.vnet.ibm.com>
[BZ #14894]

6
NEWS
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@ -16,9 +16,9 @@ Version 2.18
15007, 15014, 15020, 15023, 15036, 15054, 15055, 15062, 15078, 15084,
15085, 15086, 15160, 15214, 15221, 15232, 15234, 15283, 15285, 15287,
15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336, 15337, 15339,
15342, 15346, 15359, 15361, 15366, 15380, 15394, 15395, 15405, 15406,
15409, 15416, 15418, 15419, 15423, 15424, 15426, 15429, 15441, 15442,
15448, 15480, 15485, 15488, 15490, 15493, 15497, 15506.
15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394, 15395, 15405,
15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426, 15429, 15441,
15442, 15448, 15480, 15485, 15488, 15490, 15493, 15497, 15506.
* CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
#15078).

4
libio/genops.c
View File

@ -661,6 +661,10 @@ _IO_no_init (fp, flags, orientation, wd, jmp)
fp->_wide_data->_wide_vtable = jmp;
}
else
/* Cause predictable crash when a wide function is called on a byte
stream. */
fp->_wide_data = (struct _IO_wide_data *) -1L;
#endif
fp->_freeres_list = NULL;
}