LU-5540 lnet: fix crash due to NULL networks string

[fs/lustre-release.git] / lnet / lnet / config.c

diff --git a/lnet/lnet/config.c b/lnet/lnet/config.c
index 7dd588e..a5661f9 100644 (file)
--- a/lnet/lnet/config.c
+++ b/lnet/lnet/config.c
@@ -197,7 +197,7 @@ int
 lnet_parse_networks(struct list_head *nilist, char *networks)
 {
        struct cfs_expr_list *el = NULL;
-       int             tokensize = strlen(networks) + 1;
+       int             tokensize;
        char            *tokens;
        char            *str;
        char            *tmp;
@@ -205,6 +205,11 @@ lnet_parse_networks(struct list_head *nilist, char *networks)
        __u32           net;
        int             nnets = 0;
 
+       if (networks == NULL) {
+               CERROR("networks string is undefined\n");
+               return -EINVAL;
+       }
+
        if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
                /* _WAY_ conservative */
                LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
@@ -212,6 +217,8 @@ lnet_parse_networks(struct list_head *nilist, char *networks)
                return -EINVAL;
        }
 
+       tokensize = strlen(networks) + 1;
+
        LIBCFS_ALLOC(tokens, tokensize);
        if (tokens == NULL) {
                CERROR("Can't allocate net tokens\n");