[PATCH] drm/i915: Fix improper freeing of GTT resources

[Zilin Guan]

In the error paths of reserve_gtt_with_resource() and
insert_gtt_with_resource(), a vma_res object allocated via
i915_vma_resource_alloc() was incorrectly released using kfree().

Since i915_vma_resource_alloc() allocates objects from a dedicated
kmem_cache, using kfree() instead of the corresponding
i915_vma_resource_free() causes a mismatch between allocation and
deallocation routines, potentially leading to memory corruption.

Fix this by calling i915_vma_resource_free() to properly release the
vma_res object in both functions.

Fixes: e1a4bbb6e837d ("drm/i915: Initial introduction of vma resources")
Signed-off-by: Zilin Guan <zi...@seu.edu.cn>
---
 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c 
b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 7ab4c4e60264..16e72ef57bed 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -1524,7 +1524,7 @@ static int reserve_gtt_with_resource(struct i915_vma 
*vma, u64 offset)
                i915_vma_resource_init_from_vma(vma_res, vma);
                vma->resource = vma_res;
        } else {
-               kfree(vma_res);
+               i915_vma_resource_free(vma_res);
        }
        mutex_unlock(&vm->mutex);
 
@@ -1704,7 +1704,7 @@ static int insert_gtt_with_resource(struct i915_vma *vma)
                i915_vma_resource_init_from_vma(vma_res, vma);
                vma->resource = vma_res;
        } else {
-               kfree(vma_res);
+               i915_vma_resource_free(vma_res);
        }
        mutex_unlock(&vm->mutex);
 
-- 
2.34.1