diff options
| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-01-02 15:05:25 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-27 07:52:33 -0800 |
| commit | 5381655aa506b9298a49c424ee9cb14c44560dfb (patch) | |
| tree | 685f229f1bed5d70caa6d31aad586e7d3d30452a | |
| parent | 449309c84747918aa9e84282a918d11ee79c9b4a (diff) | |
| download | lwn-5381655aa506b9298a49c424ee9cb14c44560dfb.tar.gz lwn-5381655aa506b9298a49c424ee9cb14c44560dfb.zip | |
LOCKD: Fix a race when initialising nlmsvc_timeout
commit 06bed7d18c2c07b3e3eeadf4bd357f6e806618cc upstream.
This commit fixes a race whereby nlmclnt_init() first starts the lockd
daemon, and then calls nlm_bind_host() with the expectation that
nlmsvc_timeout has already been initialised. Unfortunately, there is no
no synchronisation between lockd() and lockd_up() to guarantee that this
is the case.
Fix is to move the initialisation of nlmsvc_timeout into lockd_create_svc
Fixes: 9a1b6bf818e74 ("LOCKD: Don't call utsname()->nodename...")
Cc: Bruce Fields <bfields@fieldses.org>
Cc: stable@vger.kernel.org # 3.10.x
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/lockd/svc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 9c8a5a6d33df..7a318480ab7a 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -137,10 +137,6 @@ lockd(void *vrqstp) dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); - if (!nlm_timeout) - nlm_timeout = LOCKD_DFLT_TIMEO; - nlmsvc_timeout = nlm_timeout * HZ; - /* * The main request loop. We don't terminate until the last * NFS mount or NFS daemon has gone away. @@ -346,6 +342,10 @@ static struct svc_serv *lockd_create_svc(void) printk(KERN_WARNING "lockd_up: no pid, %d users??\n", nlmsvc_users); + if (!nlm_timeout) + nlm_timeout = LOCKD_DFLT_TIMEO; + nlmsvc_timeout = nlm_timeout * HZ; + serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); if (!serv) { printk(KERN_WARNING "lockd_up: create service failed\n"); |