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Bug 422

Summary:	krfb: Double free in xupdatescanner.cc
Product:	TDE	Reporter:	Ignaz Forster <ignaz.forster>
Component:	tdenetwork	Assignee:	Timothy Pearson <kb9vqf>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bugwatch, darrella, nick
Priority:	P5
Version:	3.5.12 [Trinity]
Hardware:	i386
OS:	Debian Lenny
See Also:	http://bugs.debian.org/518511
Compiler Version:		TDE Version String:
Application Version:		Application Name:
Attachments:	Fix SIGABRT when closing connection

Description Ignaz Forster 2011-01-26 04:42:10 CST

When using a graphics card driver without shared memory support, krfb will crash with a SIGABRT when closing the connection. This is caused by a double free (once by calling free directly, once two lines later by XDestroyImage).

The original bug description and patch can also be found on https://bugs.kde.org/show_bug.cgi?id=148738, a success report is on http://lists.debian.org/debian-qt-kde/2009/08/msg00260.html.

Comment 1 Ignaz Forster 2011-01-26 04:43:38 CST

Created attachment 53 [details]
Fix SIGABRT when closing connection

Comment 2 Nick Leverton 2011-10-22 02:39:02 CDT

Confirming this problem is still in Trinity.  It means one cannot reconnect to a desktop via RDC protocol after disconnecting, because krdc will have crashed.  Just attempting to connect and then cancelling without entering the password will cause the crash, which means that non-authorised connectors can DOS you (as well as making it regrettably easy to DOS yourself).

I can confirm the OP's patch fixes it as I've been running a patched 3.5.10 for a while.  Can it be applied before 3.5.13, please ?

Comment 3 Timothy Pearson 2011-10-22 13:31:01 CDT

Fixed in SVN revision 1260223.

Thanks for reporting, and to Ignaz for posting the patch!