This funciton is only called from drm_gem_map_dma_buf(). It's supposed
to return error pointers on failure and returning a NULL pointer will
lead to a NULL dereference.
Fixes: 78467dc5f70f ("drm/cma: add low-level hook functions to use prime helpers")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 80a5115c3846..f8a9c09efb87 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -436,7 +436,7 @@ struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj)
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt)
- return NULL;
+ return ERR_PTR(-EINVAL);
ret = dma_get_sgtable(obj->dev->dev, sgt, cma_obj->vaddr,
cma_obj->paddr, obj->size);
@@ -447,7 +447,7 @@ struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj)
out:
kfree(sgt);
- return NULL;
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(drm_gem_cma_prime_get_sg_table);
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