workqueue: Fix missing kfree(rescuer) in destroy_workqueue()

BugLink: https://bugs.launchpad.net/bugs/1856869
commit 8efe1223d73c218ce7e8b2e0e9aadb974b582d7f upstream.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Qian Cai <cai@lca.pw>
Fixes: def98c84b6cd ("workqueue: Fix spurious sanity check failures in destroy_workqueue()")
Cc: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ab6c9d2490f9952b9eca38afd5479d05425bf1c7..7f7b05c69835e3f376db44c7a3af8316219481a3 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4342,6 +4342,7 @@ void destroy_workqueue(struct workqueue_struct *wq)
 
                /* rescuer will empty maydays list before exiting */
                kthread_stop(rescuer->task);
+               kfree(rescuer);
        }
 
        /* sanity checks */