CVE-2022-49935

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> dma-buf/dma-resv: check if the new fence is really later<br /> <br /> Previously when we added a fence to a dma_resv object we always<br /> assumed the the newer than all the existing fences.<br /> <br /> With Jason&amp;#39;s work to add an UAPI to explicit export/import that&amp;#39;s not<br /> necessary the case any more. So without this check we would allow<br /> userspace to force the kernel into an use after free error.<br /> <br /> Since the change is very small and defensive it&amp;#39;s probably a good<br /> idea to backport this to stable kernels as well just in case others<br /> are using the dma_resv object in the same way.