drm/amdkfd: fix dma_buf reference leak in get_dmabuf_info

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When kzalloc fails for metadata_buffer in
amdgpu_amdkfd_get_dmabuf_info(), the function returns -ENOMEM directly
without calling dma_buf_put(), leaking the dma_buf reference obtained
earlier via dma_buf_get().

Fix both issues by:
- Adding an error check after the first amdgpu_bo_get_metadata() call
- Replacing the direct return with r = -ENOMEM and goto out_put to
  ensure dma_buf_put() is called on all error paths

Fixes: f54ce9e8cb ("drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl")
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ffa6995533)
Cc: stable@vger.kernel.org

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This commit is contained in:

Haojie Li 2026-10-02 10:29:27 +08:00 • committed by Alex Deucher

parent 54c998c55f

commit e6895021a3

1 changed files with 6 additions and 2 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c

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