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| author | Francois Dugast <francois.dugast@intel.com> | 2026-06-16 10:17:56 +0200 |
|---|---|---|
| committer | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2026-07-01 18:01:10 +0200 |
| commit | 3feeb667197bd58a17f4edfdbcad249ffcb3c864 (patch) | |
| tree | 23ee539a6be14aed43522386b25c3da903c0f95a /Documentation/gpu/intel-display/git@git.tavy.me:linux.git | |
| parent | d42df9dce7b374079c5c41691bd62d8765768a80 (diff) | |
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)
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20260616081756.286918-1-francois.dugast@intel.com
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
(cherry picked from commit b9297d19d9df5d4b6c994648570c5dcd1cac68ff)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Diffstat (limited to 'Documentation/gpu/intel-display/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions