Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/pt: Fix NULL pointer dereference in xe_pt_zap_ptes_entry() The page-table walk framework may pass a NULL *child pointer for unpopulated entries. xe_pt_zap_ptes_entry() called container_of(*child) before checking for NULL, then dereferenced the result, causing a crash. Move the container_of() call after a NULL guard, so the function returns early instead of proceeding with an invalid pointer. XE_WARN_ON is kept to help root cause the issue, but we now bail instead of crashing the driver. v2: Comment that triggering XE_WARN_ON is unexpected behavior (Matt Brost) (cherry picked from commit b9297d19d9df5d4b6c994648570c5dcd1cac68ff)
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
dd08ebf6c3525a7ea2186e636df064ea47281987 to < ff330ce16c846b70164ff0eb544c81219d4c5c08affecteddd08ebf6c3525a7ea2186e636df064ea47281987 to < 78b1074966d290d4517f42bc81e13c4349368d12affecteddd08ebf6c3525a7ea2186e636df064ea47281987 to < d94b9922b2ae5ee6e900f8da0bd537b251c6110caffecteddd08ebf6c3525a7ea2186e636df064ea47281987 to < 3feeb667197bd58a17f4edfdbcad249ffcb3c864affected
Linux Linux
Default version status: affected
6.8affected0 to < 6.8unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected