multipathd/cli_handlers cli_resize : check pp and pgp before calling them to avoid...

Signed-off-by: Eli Qiao <taget@linux.vnet.ibm.com>

diff --git a/multipathd/cli_handlers.c b/multipathd/cli_handlers.c
index 7b1cb62..4b860bb 100644 (file)
--- a/multipathd/cli_handlers.c
+++ b/multipathd/cli_handlers.c
@@ -603,7 +603,18 @@ cli_resize(void *v, char **reply, int *len, void *data)
        }
 
        pgp = VECTOR_SLOT(mpp->pg, 0);
+
+       if (!pgp){
+               condlog(0, "%s: couldn't get path group. cannot resize",
+                       mapname);
+               return 1;
+       }
        pp = VECTOR_SLOT(pgp->paths, 0);
+
+       if (!pp){
+               condlog(0, "%s: couldn't get path. cannot resize", mapname);
+               return 1;
+       }
        if (!pp->udev || sysfs_get_size(pp, &size)) {
                condlog(0, "%s: couldn't get size for sysfs. cannot resize",
                        mapname);