dma-buf/sync_file: Don't leak fences on merge failure
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.241 by commit 19f51c2529339280d2c8c6427cd3e21ddf1ac3f8, it was introduced in version v4.9 by commit a02b9dc90d844cc7df7b63264e7920cc425052d9. For more details please see the references link.