CVE-2022-50426 remoteproc: imx_dsp_rproc: Add mutex protection for workqueue

In the Linux kernel, the following vulnerability has been resolved: remoteproc: imxdsprproc: Add mutex protection for workqueue The workqueue may execute late even after remoteproc is stopped or stopping, some resources rpmsg device and endpoint have been released in rprocstopsubdevices, then...

CVE-2022-50426

CVE-2022-50426 affects the Linux kernel remoteproc path for imx_dsp_rproc. The issue arises from a workqueue that may run after rproc_stop_subdevices releases resources, allowing rproc_vq_interrupt to access freed rpmsg endpoints. The fix adds mutex protection in imx_dsp_rproc_vq_work to skip rpr...