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

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Am 07.07.22 um 10:02 schrieb 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.pan@xxxxxxx>

Good catch, Reviewed-by: Christian König <christian.koenig@xxxxxxx>

Going to push that in a minute.

Christian.

---
  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);
  	}
  }




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