channel_new_default_attr: fix usage memory leaks

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/lttng-sessiond/channel.c b/lttng-sessiond/channel.c
index 2dd9840d4083e864230d87235eb9e01752f4cc68..9fd98b82d2d691625b5c55f0b587392d938e976b 100644 (file)
--- a/lttng-sessiond/channel.c
+++ b/lttng-sessiond/channel.c
@@ -161,19 +161,19 @@ error:
  * Create kernel channel of the kernel session and notify kernel thread.
  */
 int channel_kernel_create(struct ltt_kernel_session *ksession,
-               struct lttng_channel *chan, int kernel_pipe)
+               struct lttng_channel *attr, int kernel_pipe)
 {
        int ret;
-       struct lttng_channel *attr = chan;
+       struct lttng_channel *defattr = NULL;
 
        /* Creating channel attributes if needed */
        if (attr == NULL) {
-               /* FIXME: this appears to be a memory leak */
-               attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL);
-               if (attr == NULL) {
+               defattr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL);
+               if (defattr == NULL) {
                        ret = LTTCOMM_FATAL;
                        goto error;
                }
+               attr = defattr;
        }
 
        /* Channel not found, creating it */
@@ -191,8 +191,8 @@ int channel_kernel_create(struct ltt_kernel_session *ksession,
        }
 
        ret = LTTCOMM_OK;
-
 error:
+       free(defattr);
        return ret;
 }
 

diff --git a/lttng-sessiond/main.c b/lttng-sessiond/main.c
index ae994d7e551956200265e5450e494627a376105c..9af001dfd63d3de910d8de5f14a6beca4872f334 100644 (file)
--- a/lttng-sessiond/main.c
+++ b/lttng-sessiond/main.c
@@ -2474,8 +2474,10 @@ static int cmd_enable_event(struct ltt_session *session, int domain,
                        ret = channel_kernel_create(session->kernel_session,
                                        attr, kernel_poll_pipe[1]);
                        if (ret != LTTCOMM_OK) {
+                               free(attr);
                                goto error;
                        }
+                       free(attr);
                }
 
                /* Get the newly created kernel channel pointer */
@@ -2516,6 +2518,7 @@ static int cmd_enable_event(struct ltt_session *session, int domain,
                        /* Use the internal command enable channel */
                        ret = cmd_enable_channel(session, domain, attr);
                        if (ret < 0) {
+                               free(attr);
                                goto error;
                        }