LU-7734 lnet: fix NULL access in lnet_peer_aliveness_enabled

When a peer is not on a local network, lpni->lpni_net is NULL.
The lpni_net is access in lnet_peer_aliveness_enabled() without
checking if it's NULL. Fixed.

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: If328728e2bda2a19b273140a20c04b22bdda6bc4
Reviewed-on: http://review.whamcloud.com/22183
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Olaf Weber <olaf@sgi.com>

diff --git a/lnet/include/lnet/lib-types.h b/lnet/include/lnet/lib-types.h
index 588ea00..0e78fb2 100644 (file)
--- a/lnet/include/lnet/lib-types.h
+++ b/lnet/include/lnet/lib-types.h
@@ -562,7 +562,8 @@ struct lnet_peer_table {
 /* peer aliveness is enabled only on routers for peers in a network where the
  * lnet_ni_t::ni_peertimeout has been set to a positive value */
 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing != 0 && \
-                                        (lp)->lpni_net->net_tunables.lct_peer_timeout > 0)
+                                       ((lp)->lpni_net) && \
+                                       (lp)->lpni_net->net_tunables.lct_peer_timeout > 0)
 
 typedef struct {
        struct list_head        lr_list;        /* chain on net */