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Subject[PATCH 5.4 44/80] drm/panfrost: Fix a BO leak in panfrost_ioctl_mmap_bo()
Date
From: Boris Brezillon <boris.brezillon@collabora.com>

commit 3bb69dbcb9e8430e0cc9990cff427ca3ae25ffdc upstream.

We should release the reference we grabbed when an error occurs.

Fixes: 187d2929206e ("drm/panfrost: Add support for GPU heap allocations")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191129135908.2439529-4-boris.brezillon@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/panfrost/panfrost_drv.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -303,14 +303,17 @@ static int panfrost_ioctl_mmap_bo(struct
}

/* Don't allow mmapping of heap objects as pages are not pinned. */
- if (to_panfrost_bo(gem_obj)->is_heap)
- return -EINVAL;
+ if (to_panfrost_bo(gem_obj)->is_heap) {
+ ret = -EINVAL;
+ goto out;
+ }

ret = drm_gem_create_mmap_offset(gem_obj);
if (ret == 0)
args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
- drm_gem_object_put_unlocked(gem_obj);

+out:
+ drm_gem_object_put_unlocked(gem_obj);
return ret;
}


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