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GUACAMOLE-942: Merge correct race condition in retrieval of readable connection identifiers.

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Virtually Nick
2020-08-21 07:14:00 -04:00
committed by GitHub
parent f00f6d6935 0bddff8bad
commit 1af7b15825
1 changed files with 12 additions and 7 deletions
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19
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/tunnel/AbstractGuacamoleTunnelService.java
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@@ -623,21 +623,26 @@ public abstract class AbstractGuacamoleTunnelService implements GuacamoleTunnelS
public Collection<ActiveConnectionRecord> getActiveConnections(ModeledAuthenticatedUser user)
throws GuacamoleException {
// Simply return empty list if there are no active tunnels
Collection<ActiveConnectionRecord> records = activeTunnels.values();
if (records.isEmpty())
return Collections.<ActiveConnectionRecord>emptyList();
// Privileged users (such as system administrators) can view all
// connections; no need to filter
Collection<ActiveConnectionRecord> records = activeTunnels.values();
if (user.isPrivileged())
return records;
// Build set of all connection identifiers associated with active tunnels
Set<String> identifiers = new HashSet<String>(records.size());
Set<String> identifiers = new HashSet<>(records.size());
for (ActiveConnectionRecord record : records)
identifiers.add(record.getConnection().getIdentifier());
// Simply return empty list if there are no active tunnels (note that
// this check cannot be performed prior to building the set of
// identifiers, as activeTunnels may be non-empty at the beginning of
// the call to getActiveConnections() yet become empty before the
// set of identifiers is built, resulting in an error within
// selectReadable()
if (identifiers.isEmpty())
return Collections.<ActiveConnectionRecord>emptyList();
// Produce collection of readable connection identifiers
Collection<ConnectionModel> connections =
connectionMapper.selectReadable(user.getUser().getModel(),
@@ -649,7 +654,7 @@ public abstract class AbstractGuacamoleTunnelService implements GuacamoleTunnelS
identifiers.add(connection.getIdentifier());
// Produce readable subset of records
Collection<ActiveConnectionRecord> visibleRecords = new ArrayList<ActiveConnectionRecord>(records.size());
Collection<ActiveConnectionRecord> visibleRecords = new ArrayList<>(records.size());
for (ActiveConnectionRecord record : records) {
if (identifiers.contains(record.getConnection().getIdentifier()))
visibleRecords.add(record);