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drm/gpuvm: Do not prepare NULL objects

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Statis analysis issue:

drm_gpuvm_prepare_range issues an exec_object_prepare call to all
drm_gem_objects mapped between addr and addr + range.  However, it is
possible (albeit very unlikely) that the objects found through
drm_gpuvm_for_each_va_range (as connected to va->gem) are NULL, as seen
in other functions such as drm_gpuva_link and drm_gpuva_unlink_defer.

Do not prepare NULL objects.

Fixes: 50c1a36f59 ("drm/gpuvm: track/lock/validate external/evicted objects")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Link: https://patch.msgid.link/20260130191953.61718-2-jonathan.cavitt@intel.com
This commit is contained in:
Jonathan Cavitt 2026-01-30 19:19:54 +00:00
parent 432fafdc9a
commit 88f059f6f6
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_gpuvm.c
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@ -1322,6 +1322,9 @@ drm_gpuvm_prepare_range(struct drm_gpuvm *gpuvm, struct drm_exec *exec,
drm_gpuvm_for_each_va_range(va, gpuvm, addr, end) {
struct drm_gem_object *obj = va->gem.obj;
if (unlikely(!obj))
continue;
ret = exec_prepare_obj(exec, obj, num_fences);
if (ret)
return ret;