1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 83997282fc1a..f85472dda463 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -532,7 +532,9 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size)
                         /* Decrease the count, but don't shutdown the
                          * the service
                          */
+                        lock_kernel();
                         nfsd_serv->sv_nrthreads--;
+                        unlock_kernel();
                 }
                 return err;
         }