File: CVE-2008-1721.dpatch

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#! /bin/sh -e

# DP: CVE-2008-1721

dir=
if [ $# -eq 3 -a "$2" = '-d' ]; then
    pdir="-d $3"
    dir="$3/"
elif [ $# -ne 1 ]; then
    echo >&2 "usage: `basename $0`: -patch|-unpatch [-d <srcdir>]"
    exit 1
fi
case "$1" in
    -patch)
        patch $pdir -f --no-backup-if-mismatch -p0 < $0
        ;;
    -unpatch)
        patch $pdir -f --no-backup-if-mismatch -R -p0 < $0
        ;;
    *)
	echo >&2 "usage: `basename $0`: -patch|-unpatch [-d <srcdir>]"
        exit 1
esac
exit 0

--- Modules/zlibmodule.c	2008/04/08 23:47:30	62234
+++ Modules/zlibmodule.c	2008/04/09 00:25:17	62235
@@ -774,6 +774,10 @@
 
     if (!PyArg_ParseTuple(args, "|i:flush", &length))
 	return NULL;
+    if (length <= 0) {
+	PyErr_SetString(PyExc_ValueError, "length must be greater than zero");
+	return NULL;
+    }
     if (!(retval = PyString_FromStringAndSize(NULL, length)))
 	return NULL;