From: Lin Yi <teroincn@163.com>
To: christian.koenig@amd.com
Cc: csong@cs.ucr.edu, liujian6@iie.ac.cn, teroincn@163.com,
zhiyunq@cs.ucr.edu, dri-devel@lists.freedesktop.org,
yiqiuping@gmail.com
Subject: [PATCH] drm/ttm: fix dma_fence refcount imbalance on error path
Date: Wed, 10 Apr 2019 10:23:34 +0800 [thread overview]
Message-ID: <20190410022334.GA5008@163.com> (raw)
the ttm_bo_add_move_fence takes a reference to the struct dma_fence, but
failed to release it on the error path, leading to a memory leak.
add dma_fence_put before return when error occur.
Signed-off-by: Lin Yi <teroincn@163.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 988416f..41d07fa 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -876,8 +876,10 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
reservation_object_add_shared_fence(bo->resv, fence);
ret = reservation_object_reserve_shared(bo->resv, 1);
- if (unlikely(ret))
+ if (unlikely(ret)) {
+ dma_fence_put(fence);
return ret;
+ }
dma_fence_put(bo->moving);
bo->moving = fence;
--
1.9.1
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reply other threads:[~2019-04-10 2:43 UTC|newest]
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