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ocfs2: Fix NULL pointer dereferences in o2net 

In some situations, ocfs2_set_nn_state might get called with sc = NULL and
valid = 0. If sc = NULL, we can't dereference it to get the o2nm_node
member. Instead, do what o2net_initialize_handshake does and use NULL when
calling o2net_reconnect_delay and o2net_idle_timeout.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Tao Ma 2008-03-05 15:49:55 +08:00 committed by Mark Fasheh
parent c824c3c723
commit cdef59a94c
1 changed files with 4 additions and 5 deletions
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9
fs/ocfs2/cluster/tcp.c
View File

@ -451,9 +451,9 @@ static void o2net_set_nn_state(struct o2net_node *nn,
/* delay if we're withing a RECONNECT_DELAY of the
* last attempt */
delay = (nn->nn_last_connect_attempt +
msecs_to_jiffies(o2net_reconnect_delay(sc->sc_node)))
msecs_to_jiffies(o2net_reconnect_delay(NULL)))
- jiffies;
if (delay > msecs_to_jiffies(o2net_reconnect_delay(sc->sc_node)))
if (delay > msecs_to_jiffies(o2net_reconnect_delay(NULL)))
delay = 0;
mlog(ML_CONN, "queueing conn attempt in %lu jiffies\n", delay);
queue_delayed_work(o2net_wq, &nn->nn_connect_work, delay);
@ -1552,12 +1552,11 @@ static void o2net_connect_expired(struct work_struct *work)
spin_lock(&nn->nn_lock);
if (!nn->nn_sc_valid) {
struct o2nm_node *node = nn->nn_sc->sc_node;
mlog(ML_ERROR, "no connection established with node %u after "
"%u.%u seconds, giving up and returning errors.\n",
o2net_num_from_nn(nn),
o2net_idle_timeout(node) / 1000,
o2net_idle_timeout(node) % 1000);
o2net_idle_timeout(NULL) / 1000,
o2net_idle_timeout(NULL) % 1000);
o2net_set_nn_state(nn, NULL, 0, -ENOTCONN);
}