[PATCH] dma-buf: Fix one use-after-free of fence

[xinhui pan]

Need get the new fence when we replace the old one.

Fixes: 047a1b877ed48 ("dma-buf & drm/amdgpu: remove dma_resv workaround")
Signed-off-by: xinhui pan <xinhui....@amd.com>
---
 drivers/dma-buf/dma-resv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index 0cce6e4ec946..205acb2c744d 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -343,7 +343,7 @@ void dma_resv_replace_fences(struct dma_resv *obj, uint64_t 
context,
                if (old->context != context)
                        continue;
 
-               dma_resv_list_set(list, i, replacement, usage);
+               dma_resv_list_set(list, i, dma_fence_get(replacement), usage);
                dma_fence_put(old);
        }
 }
-- 
2.34.1