CVE-2022-50145 dmaengine: sf-pdma: Add multithread support for a DMA channel

In the Linux kernel, the following vulnerability has been resolved: dmaengine: sf-pdma: Add multithread support for a DMA channel When we get a DMA channel and try to use it in multiple threads it will cause oops and hanging the system. % echo 64 /sys/module/dmatest/parameters/threadsperchan % ec...