Hi, Note that "conn_client:" isn't a suitable tag for the subject. You should use "rxrpc:" instead.
How did you find this by the way? You shouldn't get a NULL pointer there. Either the call is waiting for a channel to be assigned (in which case the condition on: if (!list_empty(&call->chan_wait_link)) { will be true) or it should have been assigned a channel, in which case chan will not be NULL. Note that the function takes the lock under which this is managed (conn->channel_lock) across this, so it shouldn't change. Even __rxrpc_disconnect_call(), which is called to implicitly close out a call that gets superseded on its channel, doesn't stop rxrpc_disconnect_client_call() from finding the channel. David