[PATCH 5.4 316/453] drm/amdkfd: Fix leak in dmabuf import

[Greg Kroah-Hartman]

From: Felix Kuehling <felix.kuehl...@amd.com>

[ Upstream commit c897934da15f182ce99536007f8ef61c4748c07e ]

Release dmabuf reference before returning from kfd_ioctl_import_dmabuf.
amdgpu_amdkfd_gpuvm_import_dmabuf takes a reference to the underlying
GEM BO and doesn't keep the reference to the dmabuf wrapper.

Signed-off-by: Felix Kuehling <felix.kuehl...@amd.com>
Reviewed-by: Kent Russell <kent.russ...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 1d3cd5c50d5f2..4a0ef9268918c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1664,6 +1664,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep,
        }
 
        mutex_unlock(&p->mutex);
+       dma_buf_put(dmabuf);
 
        args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
 
@@ -1673,6 +1674,7 @@ err_free:
        amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem);
 err_unlock:
        mutex_unlock(&p->mutex);
+       dma_buf_put(dmabuf);
        return r;
 }
 
-- 
2.27.0