Clone command event document before storing to prevent use-after-free. (mongodb#1901)

vbabanin · web-flow · commit d7972f1259ad · 2026-02-26T10:14:15.000Z
diff --git a/driver-sync/src/test/functional/com/mongodb/client/AbstractSessionsProseTest.java b/driver-sync/src/test/functional/com/mongodb/client/AbstractSessionsProseTest.java
@@ -93,7 +93,7 @@ public void shouldCreateServerSessionOnlyAfterConnectionCheckout() throws Interr
                         .addCommandListener(new CommandListener() {
                             @Override
                             public void commandStarted(final CommandStartedEvent event) {
-                                lsidSet.add(event.getCommand().getDocument("lsid"));
+                                lsidSet.add(event.getCommand().getDocument("lsid").clone());
                             }
                         })
                         .build())) {

Original file line number	Diff line number	Diff line change
`@@ -93,7 +93,7 @@ public void shouldCreateServerSessionOnlyAfterConnectionCheckout() throws Interr`
`93`	`93`	`.addCommandListener(new CommandListener() {`
`94`	`94`	`@Override`
`95`	`95`	`public void commandStarted(final CommandStartedEvent event) {`
`96`		`- lsidSet.add(event.getCommand().getDocument("lsid"));`
	`96`	`+ lsidSet.add(event.getCommand().getDocument("lsid").clone());`
`97`	`97`	`}`
`98`	`98`	`})`
`99`	`99`	`.build())) {`