On 05/05, Cosmin Ratiu wrote:
> __qdisc_destroy() calls into various qdiscs .destroy() op, which in turn
> can call .ndo_setup_tc(), which requires the netdev instance lock.
>
> This commit extends the critical section in
> unregister_netdevice_many_notify() to cover dev_shutdown() (and
> dev_tcx_uninstall() as a side-effect) and acquires the netdev instance
> lock in __dev_change_net_namespace() for the other dev_shutdown() call.
>
> This should now guarantee that for all qdisc ops, the netdev instance
> lock is held during .ndo_setup_tc().
>
> Fixes: a0527ee2df3f ("net: hold netdev instance lock during qdisc
> ndo_setup_tc")
> Signed-off-by: Cosmin Ratiu <[email protected]>
Acked-by: Stanislav Fomichev <[email protected]>
Thanks!
