Re: rtnl_trylock() versus SCHED_FIFO lockup
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2020-08-09 15:32:49
On Sun, 9 Aug 2020 21:49:24 +0800 Hillf Danton [off-list ref] wrote:
+
+static void br_workfn(struct work_struct *w)
+{
+ struct br_work *brw = container_of(w, struct br_work, work);
+
+ rtnl_lock();
+ brw->err = brw->set(brw->br, brw->val);
+ if (!brw->err)
+ netdev_state_change(brw->br->dev);
+ rtnl_unlock();
+
+ brw->done = true;
+ wake_up(&brw->waitq);
+}Sorry, this is unsafe. This has the potential of running when bridge itself has been deleted.