There are /proc handles there setup by proc_tty_register_driver, but there is
no module ownership association, so anything that reads after module unload
will blow. Fix is to propagate owner of tty_driver to proc entry.
diff -Nru a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
--- a/fs/proc/proc_tty.c Tue Nov 25 11:18:53 2003
+++ b/fs/proc/proc_tty.c Tue Nov 25 11:18:53 2003
@@ -198,6 +198,7 @@
return;
ent->read_proc = driver->read_proc;
ent->write_proc = driver->write_proc;
+ ent->owner = driver->owner;
ent->data = driver;
driver->proc_entry = ent;