CVE-2022-50576

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> serial: pch: Fix PCI device refcount leak in pch_request_dma()<br /> <br /> As comment of pci_get_slot() says, it returns a pci_device with its<br /> refcount increased. The caller must decrement the reference count by<br /> calling pci_dev_put().<br /> <br /> Since &amp;#39;dma_dev&amp;#39; is only used to filter the channel in filter(), we can<br /> call pci_dev_put() before exiting from pch_request_dma(). Add the<br /> missing pci_dev_put() for the normal and error path.