Bug 2338847 (CVE-2024-57922)

Summary: CVE-2024-57922 kernel: drm/amd/display: Add check for granularity in dml ceil/floor helpers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-01-19 12:02:01 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Add check for granularity in dml ceil/floor helpers

[Why]
Wrapper functions for dcn_bw_ceil2() and dcn_bw_floor2()
should check for granularity is non zero to avoid assert and
divide-by-zero error in dcn_bw_ functions.

[How]
Add check for granularity 0.

(cherry picked from commit f6e09701c3eb2ccb8cb0518e0b67f1c69742a4ec)
Comment 1 Avinash Hanwate 2025-01-20 05:24:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025011942-CVE-2024-57922-1f81@gregkh/T