git: openjdk/jdk17u-dev: 8282730: LdapLoginModule throw NPE from logout method after login failure

[Goetz Lindenmaier]

Changeset: f35b541b
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2022-10-18 12:16:02 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/f35b541be1f231916e6c653d37f811d21f867d21

8282730: LdapLoginModule throw NPE from logout method after login failure

Backport-of: 554f44ecb1134acff3eaf02e2e1c0e01158ab7e5

! src/java.base/share/classes/javax/security/auth/Subject.java
! src/java.base/share/classes/javax/security/auth/login/LoginContext.java
! src/java.base/share/classes/javax/security/auth/spi/LoginModule.java
! src/java.management/share/classes/com/sun/jmx/remote/security/FileLoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/JndiLoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/KeyStoreLoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/Krb5LoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/LdapLoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/NTLoginModule.java
! src/jdk.security.auth/share/classes/com/sun/security/auth/module/UnixLoginModule.java
+ test/jdk/javax/security/auth/login/modules/SafeLogout.java