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...

CVE-2021-47439

The CVE-2021-47439 issue concerns the Linux kernel’s net: dsa: microchip ksz driver. Root cause: during rmmod, ksz_switch_remove unregisters a switch while a non-zero mib_interval can cause ksz_mac_link_down to reschedule mib_read_work, leading to a null pointer access to dp->slave after unreg...