CVE-2021-47176

In the Linux kernel, the following vulnerability has been resolved:
s390/dasd: add missing discipline function Fix crash with illegal operation
exception in dasd_device_tasklet. Commit b72949328869 (“s390/dasd: Prepare
for additional path event handling”) renamed the verify_path function for
ECKD but not for FBA and DIAG. This leads to a panic when the path
verification function is called for a FBA or DIAG device. Fix by defining a
wrapper function for dasd_generic_verify_path().