CVE-2022-48645

In the Linux kernel, the following vulnerability has been resolved: net:
enetc: deny offload of tc-based TSN features on VF interfaces TSN features
on the ENETC (taprio, cbs, gate, police) are configured through a mix of
command BD ring messages and port registers: enetc_port_rd(),
enetc_port_wr(). Port registers are a region of the ENETC memory map which
are only accessible from the PCIe Physical Function. They are not
accessible from the Virtual Functions. Moreover, attempting to access these
registers crashes the kernel: $ echo 1 >
/sys/bus/pci/devices/0000:00:00.0/sriov_numvfs pci 0000:00:01.0:
[1957:ef00] type 00 class 0x020001 fsl_enetc_vf 0000:00:01.0: Adding to
iommu group 15 fsl_enetc_vf 0000:00:01.0: enabling device (0000 -> 0002)
fsl_enetc_vf 0000:00:01.0 eno0vf0: renamed from eth0 $ tc qdisc replace dev
eno0vf0 root taprio num_tc 8 map 0 1 2 3 4 5 6 7 \ queues 1@0 1@1 1@2 1@3
1@4 1@5 1@6 1@7 base-time 0 \ sched-entry S 0x7f 900000 sched-entry S 0x80
100000 flags 0x2 Unable to handle kernel paging request at virtual address
ffff800009551a08 Internal error: Oops: 96000007 [#1] PREEMPT SMP pc :
enetc_setup_tc_taprio+0x170/0x47c lr : enetc_setup_tc_taprio+0x16c/0x47c
Call trace: enetc_setup_tc_taprio+0x170/0x47c enetc_setup_tc+0x38/0x2dc
taprio_change+0x43c/0x970 taprio_init+0x188/0x1e0 qdisc_create+0x114/0x470
tc_modify_qdisc+0x1fc/0x6c0 rtnetlink_rcv_msg+0x12c/0x390 Split
enetc_setup_tc() into separate functions for the PF and for the VF drivers.
Also remove enetc_qos.o from being included into enetc-vf.ko, since it
serves absolutely no purpose there.