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Code Issues Releases Wiki Activity

Fix NPE in Roster's presence listeners if 'from' is not set

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The NPE is caused by an inbound presence stanza without the 'from'
attribute set. The stacktrace of the NPE is:

FATAL EXCEPTION: Smack Cached Executor
Process: de.fhg.ivi.senetz.mobile.android.mbk.debug, PID: 13365
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference
    at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:944)
    at org.jivesoftware.smack.roster.Roster.getPresencesInternal(Roster.java:374)
    at org.jivesoftware.smack.roster.Roster.getOrCreatePresencesInternal(Roster.java:388)
    at org.jivesoftware.smack.roster.Roster.access$1100(Roster.java:94)
    at org.jivesoftware.smack.roster.Roster$PresencePacketListener$1.run(Roster.java:1519)
    at org.jivesoftware.smack.AsyncButOrdered$Handler.run(AsyncButOrdered.java:121)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
    at java.lang.Thread.run(Thread.java:764)

Thanks to Marcel Heckel for reporting this.

Fixes SMACK-861.
This commit is contained in:
Florian Schmaus 2019-04-01 22:02:36 +02:00
parent 25b3f35421
commit 9be498c440
1 changed files with 23 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java
View file

@ -1471,7 +1471,29 @@ public final class Roster extends Manager {
final Presence presence = (Presence) packet;
final Jid from = presence.getFrom();
final BareJid key = from != null ? from.asBareJid() : null;
final BareJid key;
if (from != null) {
key = from.asBareJid();
} else {
XMPPConnection connection = connection();
if (connection == null) {
LOGGER.finest("Connection was null while trying to handle exotic presence stanza: " + presence);
return;
}
// Assume the presence come "from the users account on the server" since no from was set (RFC 6120 §
// 8.1.2.1 4.). Note that getUser() may return null, but should never return null in this case as where
// connected.
EntityFullJid myJid = connection.getUser();
if (myJid == null) {
LOGGER.info(
"Connection had no local address in Roster's presence listener."
+ " Possibly we received a presence without from before being authenticated."
+ " Presence: " + presence);
return;
}
LOGGER.info("Exotic presence stanza without from received: " + presence);
key = myJid.asBareJid();
}
asyncButOrdered.performAsyncButOrdered(key, new Runnable() {
@Override