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Bug 406063

Summary: kde-base/kmail-4.7.4-r1: clamav integration may crash kmail
Product: Gentoo Linux Reporter: Joerg Schaible <joerg.schaible>
Component: [OLD] KDEAssignee: Gentoo KDE team <kde>
Severity: major    
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard: tracking upstream
Package list:
Runtime testing required: ---

Description Joerg Schaible 2012-02-27 19:15:48 UTC
I have a IMAP resource with offline support. KMail uses clamav with the help of the script to scan the mails on the server by downloading them, adding a virus flag and put them back to the server. Unfortunately this script is buggy and it will double the size of the mail each time it is scanned. One mail that I have in the box since ~3 weeks has meanwhile a size of 540MB causing KMail to crash after allocating more than 4GB of memory and bringing the complete system nearly to halt because of major IO/swapping activity.

Reproducible: Always

Steps to Reproduce:
1. Ensure that you have clamav installed and running
2. Create a resource for an IMAP account with offline support
3. Ensure that you have a mail with a bigger attachment in your inbox
4. Trigger the scan
5. Repeat last step

Actual Results:  
Memory usage is constantly growing, mail on server doubles with each scan.

Expected Results:  
Actually I do not expect KMail to rescan a mail that has already a X-Virus-Flag, nor do I expect the mail to double.

How can I clean up this mess now on my server?
Comment 1 Joerg Schaible 2012-02-27 19:42:52 UTC
Sorry, means kmail-4.7.4-r1 in subject
Comment 2 Joerg Schaible 2012-03-03 23:00:18 UTC
The problem arises with any AV integration filters currently and its not the scripts, it has to be a changed behavior of KMail itself. See upstream bug description.
Comment 3 Michael Palimaka (kensington) gentoo-dev 2013-08-20 13:14:28 UTC
Does this issue persist with a more recent version of kmail?