CVE-2023-54129

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

octeontx2-af: Add validation for lmac type

Upon physical link change, firmware reports to the kernel about the

change along with the details like speed, lmac_type_id, etc.

Kernel derives lmac_type based on lmac_type_id received from firmware.

In a few scenarios, firmware returns an invalid lmac_type_id, which

is resulting in below kernel panic. This patch adds the missing

validation of the lmac_type_id field.

Internal error: Oops: 96000005 [#1] PREEMPT SMP

[ 35.321595] Modules linked in:

[ 35.328982] CPU: 0 PID: 31 Comm: kworker/0:1 Not tainted

5.4.210-g2e3169d8e1bc-dirty #17

[ 35.337014] Hardware name: Marvell CN103XX board (DT)

[ 35.344297] Workqueue: events work_for_cpu_fn

[ 35.352730] pstate: 40400089 (nZcv daIf +PAN -UAO)

[ 35.360267] pc : strncpy+0x10/0x30

[ 35.366595] lr : cgx_link_change_handler+0x90/0x180