Guardian abnormally terminates SuperServer.exe with code=4294967295 when
someone issues call of iscDatabaseInfo() with error buffer size = 0
--------------------------------------------------------------------------------------------------------------------------------------------
Key: CORE-4300
URL: http://tracker.firebirdsql.org/browse/CORE-4300
Project: Firebird Core
Issue Type: Bug
Components: Guardian
Reporter: Pavel Zotov
Attachments: FbGetDatabaseinfo_java.zip
It seems that there is somewhat like flaw in protection from invalid arguments
inside function iscDatabaseInfo.
For example, gardian of FB SuperServer 2.5.2 will stops service if we pass
buffer size = 0 instead of returning (for instance) just empty buffer.
Sample for JayBird (source .java see in attah, class FbGetDatabaseInfo).
window #1
=========
java -cp .;jaybird-full-2.2.4.jar FbGetDatabaseInfo
output:
---------
23:28:46.421 trying to attach. . .
23:28:46.531 attached to 192.168.0.201/3252:employee
23:28:46.546 trying to gather db statistics. . .
--- hangs! no output any more ---
After few seconds in firebird.log on host 192.168.0.201:
CSMIRROR (Client) Sun Dec 15 23:29:10 2013
"C:\1Install\FIREBIRD_2_5\bin\fbserver.exe": terminated abnormally
(4294967295)
Window #1 will hang infinitely after that moment.
window #2
========
isql 192.168.0.201/3252:employee
-- also hangs :( // no answer during five minutes; after this I've cancelled
this waiting
BTW, even if we kill window #1 Firebird will not answered for further attempts
to connect via ISQL. Guardian service can be terminated only after ~ 1 minute
rather than in 1-2 seconds as in common case.
===========================
SQL> show version;
ISQL Version: WI-V2.5.3.26722 Firebird 2.5
Server version:
Firebird/x86/Windows NT (access method), version "WI-V2.5.3.26682 Firebird 2.5"
Firebird/x86/Windows NT (remote server), version "WI-V2.5.3.26682 Firebird
2.5/tcp (CSMIRROR)/P12"
Firebird/x86/Windows NT (remote interface), version "WI-V2.5.3.26722 Firebird
2.5/tcp (csprog)/P12"
on disk structure version 11.2
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