Fix: liblttng-ctl: unreported truncations when copying strings

[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl-health.c

diff --git a/src/lib/lttng-ctl/lttng-ctl-health.c b/src/lib/lttng-ctl/lttng-ctl-health.c
index 9ae3d4174969e666f13ad56cfe8240e3a147d237..dc1516db5d0c7336371e10f0408927eef34a949e 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl-health.c
+++ b/src/lib/lttng-ctl/lttng-ctl-health.c
@@ -94,7 +94,7 @@ const char **thread_name[NR_HEALTH_COMPONENT] = {
 /*
  * Set health socket path.
  *
- * Returns 0 on success or -ENOMEM.
+ * Returns 0 on success or a negative errno.
  */
 static
 int set_health_socket_path(struct lttng_health *lh,
@@ -143,10 +143,10 @@ int set_health_socket_path(struct lttng_health *lh,
        uid = getuid();
 
        if (uid == 0 || tracing_group) {
-               lttng_ctl_copy_string(lh->health_sock_path,
+               ret = lttng_strncpy(lh->health_sock_path,
                                global_str,
                                sizeof(lh->health_sock_path));
-               return 0;
+               return ret == 0 ? 0 : -EINVAL;
        }
 
        /*
@@ -218,20 +218,30 @@ struct lttng_health *
 
 struct lttng_health *lttng_health_create_relayd(const char *path)
 {
-       struct lttng_health *lh;
+       int ret;
+       struct lttng_health *lh = NULL;
 
        if (!path) {
-               return NULL;
+               goto error;
        }
 
        lh = lttng_health_create(HEALTH_COMPONENT_RELAYD,
                        NR_HEALTH_RELAYD_TYPES);
        if (!lh) {
-               return NULL;
+               goto error;
        }
-       lttng_ctl_copy_string(lh->health_sock_path, path,
-               sizeof(lh->health_sock_path));
+
+       ret = lttng_strncpy(lh->health_sock_path, path ?: "",
+                           sizeof(lh->health_sock_path));
+       if (ret) {
+               goto error;
+       }
+
        return lh;
+
+error:
+       free(lh);
+       return NULL;
 }
 
 void lttng_health_destroy(struct lttng_health *lh)