The size of the EDID data should be passed into decode_edid (or a replacement API) and the parsers should verify that the length is at least 128. The caller appears to ensure that the size is divisible by 128, so unless the X server returns a size of 0, the current code shouldn't crash in most cases.
(In reply to Florian Weimer from comment #0) > The size of the EDID data should be passed into decode_edid (or a > replacement API) and the parsers should verify that the length is at least > 128. We already check for a multiple of 128 bytes in read_edid_data(), and I don't think XRRGetOutputProperty will return with the property if it has a zero size, but to be sure I've added an explicit check in this commit: commit 80b400b717bc556fcd42f93b297410d3c4f56631 Author: Richard Hughes <richard> Date: Tue Jul 30 10:37:50 2013 +0100 Ensure EDID is at least 128 bytes and a multiple of 128 bytes Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=956772
This bug appears to have been reported against 'rawhide' during the Fedora 20 development cycle. Changing version to '20'. More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora20
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Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.