EDAC/altera: Use parent device for devres in altr_portb_setup()

Overview

In the Linux kernel, the following vulnerability has been resolved:

EDAC/altera: Use parent device for devres in altr_portb_setup()

Anchor the devres group and the devm-managed IRQ requests in altr_portb_setup() to the actual parent device (device->edac->dev) instead of the embedded struct device inside the copied per-port altr_edac_device_dev.

This keeps devres_open_group(), devm_request_irq(), devres_remove_group() and devres_release_group() all referring to the same long-lived device so the group and the resources allocated inside it are torn down together.

Affected

• Linux >= 911049845d7096c27304930ff478cbf3f2623ba3 < 8325ecf3f16d764a0e0ba42c95b63f08e38710a8
• Linux >= 911049845d7096c27304930ff478cbf3f2623ba3 < 2cf03ada03532bfb42f06fbf01d9e2a99e6011d7
• Linux >= 911049845d7096c27304930ff478cbf3f2623ba3 < dc4797c909b6cacb1bb24449e6c57d50a14d73bf
• Linux >= 911049845d7096c27304930ff478cbf3f2623ba3 < 9868f5c077dfe0b606331f2e782484f91a5789a5
• Linux 4.9

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.