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8221530: Caller sensitive methods not handling caller = null when invoked by JNI code with no java frames on stack

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Reviewed-by: alanb, dholmes, sundar
This commit is contained in:
Mandy Chung 2019-04-06 21:16:40 +08:00
parent ab361746ec
commit a5b9e0f7ba
5 changed files with 262 additions and 5 deletions
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4
make/test/JtregNativeJdk.gmk
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@ -1,5 +1,5 @@
#
# Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
# Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
@ -72,6 +72,8 @@ else
BUILD_JDK_JTREG_EXECUTABLES_LIBS_exeJliLaunchTest := -ljli
endif
BUILD_JDK_JTREG_EXECUTABLES_LIBS_exeCallerAccessTest := -ljvm
ifeq ($(call isTargetOs, macosx), true)
BUILD_JDK_JTREG_LIBRARIES_CFLAGS_libTestMainKeyWindow := -ObjC
BUILD_JDK_JTREG_LIBRARIES_LIBS_libTestMainKeyWindow := -framework JavaVM \

14
src/java.base/share/classes/java/lang/reflect/AccessibleObject.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -56,7 +56,10 @@ import sun.security.util.SecurityConstants;
* {@code Field}s, {@code Method}s, or {@code Constructor}s are used to get or
* set fields, to invoke methods, or to create and initialize new instances of
* classes, respectively. Every reflected object checks that the code using it
* is in an appropriate class, package, or module. </p>
* is in an appropriate class, package, or module. The check when invoked by
* <a href="{@docRoot}/../specs/jni/index.html">JNI code</a> with no Java
* class on the stack only succeeds if the member and the declaring class are
* public, and the class is in a package that is exported to all modules. </p>
*
* <p> The one variation from Java language access control is that the checks
* by reflected objects assume readability. That is, the module containing
@ -670,6 +673,13 @@ public class AccessibleObject implements AnnotatedElement {
private boolean slowVerifyAccess(Class<?> caller, Class<?> memberClass,
Class<?> targetClass, int modifiers)
{
if (caller == null) {
// No caller frame when a native thread attaches to the VM
// only allow access to a public accessible member
return Reflection.verifyPublicMemberAccess(memberClass, modifiers);
}
if (!Reflection.verifyMemberAccess(caller, memberClass, targetClass, modifiers)) {
// access denied
return false;

55
src/java.base/share/classes/jdk/internal/reflect/Reflection.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -122,6 +122,9 @@ public class Reflection {
Class<?> targetClass,
int modifiers)
{
Objects.requireNonNull(currentClass);
Objects.requireNonNull(memberClass);
if (currentClass == memberClass) {
// Always succeeds
return true;
@ -201,6 +204,22 @@ public class Reflection {
return true;
}
/*
* Verify if a member is public and memberClass is a public type
* in a package that is unconditionally exported and
* return {@code true}if it is granted.
*
* @param memberClass the declaring class of the member being accessed
* @param modifiers the member's access modifiers
* @return {@code true} if the member is public and in a publicly accessible type
*/
public static boolean verifyPublicMemberAccess(Class<?> memberClass, int modifiers) {
Module m = memberClass.getModule();
return Modifier.isPublic(modifiers)
&& m.isExported(memberClass.getPackageName())
&& Modifier.isPublic(Reflection.getClassAccessFlags(memberClass));
}
/**
* Returns {@code true} if memberClass's module exports memberClass's
* package to currentModule.
@ -325,8 +344,10 @@ public class Reflection {
Class<?> memberClass,
Class<?> targetClass,
int modifiers)
throws IllegalAccessException
{
if (currentClass == null)
return newIllegalAccessException(memberClass, modifiers);
String currentSuffix = "";
String memberSuffix = "";
Module m1 = currentClass.getModule();
@ -355,6 +376,36 @@ public class Reflection {
return new IllegalAccessException(msg);
}
/**
* Returns an IllegalAccessException with an exception message where
* there is no caller frame.
*/
private static IllegalAccessException newIllegalAccessException(Class<?> memberClass,
int modifiers)
{
String memberSuffix = "";
Module m2 = memberClass.getModule();
if (m2.isNamed())
memberSuffix = " (in " + m2 + ")";
String memberPackageName = memberClass.getPackageName();
String msg = "JNI attached native thread (null caller frame) cannot access ";
if (m2.isExported(memberPackageName)) {
// module access okay so include the modifiers in the message
msg += "a member of " + memberClass + memberSuffix +
" with modifiers \"" + Modifier.toString(modifiers) + "\"";
} else {
// module access failed
msg += memberClass + memberSuffix+ " because "
+ m2 + " does not export " + memberPackageName;
}
return new IllegalAccessException(msg);
}
/**
* Returns true if {@code currentClass} and {@code memberClass}
* are nestmates - that is, if they have the same nesthost as

67
test/jdk/java/lang/reflect/exeCallerAccessTest/CallerAccessTest.java Normal file
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@ -0,0 +1,67 @@
/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/**
* @test
* @bug 8221530
* @summary Test uses custom launcher that starts VM using JNI that verifies
* reflection API with null caller class
* @library /test/lib
* @run main/native CallerAccessTest
*/
import java.io.File;
import java.util.Map;
import jdk.test.lib.Platform;
import jdk.test.lib.Utils;
import jdk.test.lib.process.OutputAnalyzer;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
public class CallerAccessTest {
public static void main(String[] args) throws IOException {
Path launcher = Paths.get(System.getProperty("test.nativepath"), "CallerAccessTest");
ProcessBuilder pb = new ProcessBuilder(launcher.toString());
Map<String, String> env = pb.environment();
String libName = Platform.isWindows() ? "bin" : "lib";
Path libPath = Paths.get(Utils.TEST_JDK).resolve(libName);
String libDir = libPath.toAbsolutePath().toString();
String serverDir = libPath.resolve("server").toAbsolutePath().toString();
// set up shared library path
String sharedLibraryPathEnvName = Platform.sharedLibraryPathVariableName();
env.compute(sharedLibraryPathEnvName,
(k, v) -> (v == null) ? libDir : v + File.pathSeparator + libDir);
env.compute(sharedLibraryPathEnvName,
(k, v) -> (v == null) ? serverDir : v + File.pathSeparator + serverDir);
System.out.println("Launching: " + launcher + " shared library path: " +
env.get(sharedLibraryPathEnvName));
new OutputAnalyzer(pb.start()).shouldHaveExitValue(0);
}
}

127
test/jdk/java/lang/reflect/exeCallerAccessTest/exeCallerAccessTest.c Normal file
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@ -0,0 +1,127 @@
/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <stdio.h>
#include <stdlib.h>
#include "jni.h"
#include "assert.h"
static jclass classClass;
static jclass iaeClass;
static jmethodID mid_Class_forName;
static jmethodID mid_Class_getField;
static jmethodID mid_Field_get;
int getField(JNIEnv *env, char* declaringClass_name, char* field_name);
int main(int argc, char** args) {
JavaVM *jvm;
JNIEnv *env;
JavaVMInitArgs vm_args;
JavaVMOption options[1];
jint rc;
vm_args.version = JNI_VERSION_1_2;
vm_args.nOptions = 0;
vm_args.options = options;
if ((rc = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args)) != JNI_OK) {
printf("ERROR: cannot create VM.\n");
exit(-1);
}
classClass = (*env)->FindClass(env, "java/lang/Class");
iaeClass = (*env)->FindClass(env, "java/lang/IllegalAccessException");
mid_Class_forName = (*env)->GetStaticMethodID(env, classClass, "forName",
"(Ljava/lang/String;)Ljava/lang/Class;");
assert(mid_Class_forName != NULL);
mid_Class_getField = (*env)->GetMethodID(env, classClass, "getField",
"(Ljava/lang/String;)Ljava/lang/reflect/Field;");
assert(mid_Class_getField != NULL);
jclass fieldClass = (*env)->FindClass(env, "java/lang/reflect/Field");
mid_Field_get = (*env)->GetMethodID(env, fieldClass, "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
assert(mid_Class_getField != NULL);
// can access to public member of an exported type
if ((rc = getField(env, "java.lang.Integer", "TYPE")) != 0) {
printf("ERROR: fail to access java.lang.Integer::TYPE\n");
exit(-1);
}
// expect IAE to jdk.internal.misc.Unsafe class
if ((rc = getField(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET")) == 0) {
printf("ERROR: IAE not thrown\n");
exit(-1);
}
if (checkAndClearIllegalAccessExceptionThrown(env) != JNI_TRUE) {
printf("ERROR: exception is not an instance of IAE\n");
exit(-1);
}
// expect IAE to jdk.internal.misc.Unsafe class
if ((rc = getField(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET")) == 0) {
printf("ERROR: IAE not thrown\n");
exit(-1);
}
if (checkAndClearIllegalAccessExceptionThrown(env) != JNI_TRUE) {
printf("ERROR: exception is not an instance of IAE\n");
exit(-1);
}
(*jvm)->DestroyJavaVM(jvm);
}
int checkAndClearIllegalAccessExceptionThrown(JNIEnv *env) {
jthrowable t = (*env)->ExceptionOccurred(env);
if ((*env)->IsInstanceOf(env, t, iaeClass) == JNI_TRUE) {
(*env)->ExceptionClear(env);
return JNI_TRUE;
}
return JNI_FALSE;
}
int getField(JNIEnv *env, char* declaringClass_name, char* field_name) {
jobject c = (*env)->CallStaticObjectMethod(env, classClass, mid_Class_forName,
(*env)->NewStringUTF(env, declaringClass_name));
if ((*env)->ExceptionOccurred(env) != NULL) {
(*env)->ExceptionDescribe(env);
return 1;
}
jobject f = (*env)->CallObjectMethod(env, c, mid_Class_getField, (*env)->NewStringUTF(env, field_name));
if ((*env)->ExceptionOccurred(env) != NULL) {
(*env)->ExceptionDescribe(env);
return 2;
}
jobject v = (*env)->CallObjectMethod(env, f, mid_Field_get, c);
if ((*env)->ExceptionOccurred(env) != NULL) {
(*env)->ExceptionDescribe(env);
return 3;
}
return 0;
}