This is a note to let you know that I've just added the patch titled NFS: restore module put when manager exits. to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: nfs-restore-module-put-when-manager-exits.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 080abad71e99d2becf38c978572982130b927a28 Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb@xxxxxxx> Date: Thu, 23 Jun 2022 14:47:34 +1000 Subject: NFS: restore module put when manager exits. From: NeilBrown <neilb@xxxxxxx> commit 080abad71e99d2becf38c978572982130b927a28 upstream. Commit f49169c97fce ("NFSD: Remove svc_serv_ops::svo_module") removed calls to module_put_and_kthread_exit() from threads that acted as SUNRPC servers and had a related svc_serv_ops structure. This was correct. It ALSO removed the module_put_and_kthread_exit() call from nfs4_run_state_manager() which is NOT a SUNRPC service. Consequently every time the NFSv4 state manager runs the module count increments and won't be decremented. So the nfsv4 module cannot be unloaded. So restore the module_put_and_kthread_exit() call. Fixes: f49169c97fce ("NFSD: Remove svc_serv_ops::svo_module") Signed-off-by: NeilBrown <neilb@xxxxxxx> Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/nfs/nfs4state.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -2743,5 +2743,6 @@ again: goto again; nfs_put_client(clp); + module_put_and_kthread_exit(0); return 0; } Patches currently in stable-queue which might be from neilb@xxxxxxx are queue-5.18/nfs-restore-module-put-when-manager-exits.patch