Bug 41182

Summary: X server does not check module version when reloading modules
Product: xorg Reporter: Michal Suchanek <hramrach>
Component: Server/DDX/Xorg/dlloaderAssignee: Adam Jackson <ajax>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.6 (2010.12)   
Hardware: Other   
OS: All   
Whiteboard: 2011BRB_Reviewed
i915 platform: i915 features:
Attachments:
Description Flags
patch - check module version on every module load none

Description Michal Suchanek 2011-09-25 05:10:07 UTC 
Created attachment 51585 [details] [review]
patch - check module version on every module load

The X server "duplicates" modules by loading them again from the disk.

Since this "duplication" happens on every input device hotplug, possibly weeks after the X server has been started a different module might have been installed by that time (eg. due to upgrading distribution packages) the X server should check the module every time it is loaded to prevent weird issues due to modules compiled for different ABI.

I compiled an X server with the patch and it worked but I have no idea how to test the error paths.
Comment 1 Jeremy Huddleston Sequoia 2011-10-06 12:24:38 UTC 
Please send your patch to xorg-devel for review.
Comment 2 Michal Suchanek 2011-11-17 08:51:55 UTC 
An alternative patch that prevents the reload was checked in.

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