CVE-2021-47439 net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work

In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling kszmibreadwork When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, kszswitchremove function tries to...