From: NeilBrown The refcount that nfsd holds on lockd is based on the number of open sockets. So when we close a socket, we should decrement the ref (with lockd_down). Currently when a socket is closed via writing to the portlist file, that doesn't happen. So: make sure we get an error return if the socket that was requested does is not found, and call lockd_down if it was. Cc: "J. Bruce Fields" Signed-off-by: Neil Brown Signed-off-by: Andrew Morton --- fs/nfsd/nfsctl.c | 2 ++ net/sunrpc/svcsock.c | 2 ++ 2 files changed, 4 insertions(+) diff -puN fs/nfsd/nfsctl.c~knfsd-call-lockd_down-when-closing-a-socket-via-a-write-to-nfsd-portlist fs/nfsd/nfsctl.c --- a/fs/nfsd/nfsctl.c~knfsd-call-lockd_down-when-closing-a-socket-via-a-write-to-nfsd-portlist +++ a/fs/nfsd/nfsctl.c @@ -545,6 +545,8 @@ static ssize_t write_ports(struct file * if (nfsd_serv) len = svc_sock_names(buf, nfsd_serv, toclose); unlock_kernel(); + if (len >= 0) + lockd_down(); kfree(toclose); return len; } diff -puN net/sunrpc/svcsock.c~knfsd-call-lockd_down-when-closing-a-socket-via-a-write-to-nfsd-portlist net/sunrpc/svcsock.c --- a/net/sunrpc/svcsock.c~knfsd-call-lockd_down-when-closing-a-socket-via-a-write-to-nfsd-portlist +++ a/net/sunrpc/svcsock.c @@ -493,6 +493,8 @@ svc_sock_names(char *buf, struct svc_ser spin_unlock(&serv->sv_lock); if (closesk) svc_delete_socket(closesk); + else if (toclose) + return -ENOENT; return len; } EXPORT_SYMBOL(svc_sock_names); _