Bug 1227791 (CVE-2024-40926)

Summary: VUL-0: CVE-2024-40926: kernel: drm/nouveau: don't attempt to schedule hpd_work on headless cards
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED FIXED QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: camila.matos, miroslav.franc
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/413853/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-40926:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-07-15 12:19:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/nouveau: don't attempt to schedule hpd_work on headless cards

If the card doesn't have display hardware, hpd_work and hpd_lock are
left uninitialized which causes BUG when attempting to schedule hpd_work
on runtime PM resume.

Fix it by adding headless flag to DRM and skip any hpd if it's set.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-40926
https://www.cve.org/CVERecord?id=CVE-2024-40926
https://git.kernel.org/stable/c/227349998e5740f14d531b0f0d704e66b1ed3c2f
https://git.kernel.org/stable/c/b96a225377b6602299a03d2ce3c289b68cd41bb7
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-40926.mbox