Re: [PATCH net v3] net: mscc: ocelot: Fix crash when adding interface under a lag

[Vladimir Oltean]

On Thu, Dec 25, 2025 at 08:36:17PM +0000, Jerry Wu wrote:
> Commit 15faa1f67ab4 ("lan966x: Fix crash when adding interface under a lag")
> fixed a similar issue in the lan966x driver caused by a NULL pointer dereference.
> The ocelot_set_aggr_pgids() function in the ocelot driver has similar logic
> and is susceptible to the same crash.
> 
> This issue specifically affects the ocelot_vsc7514.c frontend, which leaves
> unused ports as NULL pointers. The felix_vsc9959.c frontend is unaffected as
> it uses the DSA framework which registers all ports.
> 
> Fix this by checking if the port pointer is valid before accessing it.
> 
> Fixes: 528d3f190c98 ("net: mscc: ocelot: drop the use of the "lags" array")
> Signed-off-by: Jerry Wu <w.7erry@xxxxxxxxxxx>
> ---

Reviewed-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>

Thanks!