Bug 53608

Summary:	corrupt image causes segfault in kioslave, konqueror
Product:	[Frameworks and Libraries] kio	Reporter:	Roger Luethi <rl>
Component:	thumbnail	Assignee:	Malte Starostik <malte>
Status:	RESOLVED WORKSFORME
Severity:	crash
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:
Attachments:	this file causes crash in kioslave and konqueror

Description Roger Luethi 2003-01-29 19:40:11 UTC

Version:           unknown (using KDE 3.1.0)
Installed from:    SuSE
Compiler:          gcc version 2.95.3 20010315 (SuSE)
OS:          Linux (i686) release 2.5.58

A corrupt JPEG can cause this message when konqueror tries to produce a thumbnail:
mcop warning: user defined signal handler found for SIG_PIPE, overriding
kioslave : ###############SEG FAULT#############

First line is unrelated, the warning comes with "good" images as well.

Obviously, no thumbnail is produced. Now if the mouse pointer is moved over the broken picture, konquerer crashes immediately instead of providing the file tip.

One way to achieve this is by putting extra data in JPEG segments. I suppose the parser doesn't take it well if it doesn't find a marker where one is expected (at the end of a segment, that is). I've got a 28 byte file that does the trick.

Comment 1 Roger Luethi 2003-02-17 14:57:39 UTC

Created attachment 977 [details]
this file causes crash in kioslave and konqueror

* kioslave segfaults when trying to thumbnail this file
* konqueror crashes when creating file tip for this file ("Show
  file tips must be enabled", "Show previews in file tips" makes
  no difference(!))

Comment 2 Roger Luethi 2003-03-29 10:56:32 UTC

With KDE 3.1.1, konqueror itself doesn't crash anymore.

Still seeing an error message for kioslave, though:
kioslave: ####### CRASH ###### pid = 3866 signal = 11

Leaves me wondering how CRASH with signal 11 is an improvement over SEGFAULT :).

Half of it solved. Leaving as not resolved.

Comment 3 Pawel Orzechowski 2003-04-01 18:06:38 UTC

With KDE 3.1.1 RedHat packages (RedHat 8.0), 
there are also a lot of following messagess: 
"kioslave: ####### CRASH ###### pid = xxxx signal = 11"  
in .xsession-errors file.  
However it does not depend only on JPEG file thumbnail which is to be displayed, but as I 
suppose, this is also with MS doc or xls files. Of course no thumbnail is displayed. 
While there are many files in folder to be thumbnailed, this causes kio_slave to eat a lot of 
memory resources. After I kill all kio* processess, the system gets back to normall

Comment 4 Roger Luethi 2004-05-11 11:48:39 UTC

The CRASH message is gone in KDE 3.2.1 AFAICT. I assume that means
somebody fixed the bug rather than just removing the error message :-).