kprobes support: fix handling of event description

[lttng-modules.git] / probes / lttng-kprobes.c

diff --git a/probes/lttng-kprobes.c b/probes/lttng-kprobes.c
index bee935f779bfe699ecd1e97e299c41c8e32155a6..1cffe685bd834f7738020e4f36a4c13e7127245c 100644 (file)
--- a/probes/lttng-kprobes.c
+++ b/probes/lttng-kprobes.c
@@ -44,18 +44,19 @@ static
 int lttng_create_kprobe_event(const char *name, struct ltt_event *event)
 {
        struct lttng_event_field *field;
+       struct lttng_event_desc *desc;
        int ret;
 
-       event->desc = kzalloc(sizeof(*event->desc), GFP_KERNEL);
-       if (!event->desc)
+       desc = kzalloc(sizeof(*event->desc), GFP_KERNEL);
+       if (!desc)
                return -ENOMEM;
-       event->desc->name = kstrdup(name, GFP_KERNEL);
-       if (!event->desc->name) {
+       desc->name = kstrdup(name, GFP_KERNEL);
+       if (!desc->name) {
                ret = -ENOMEM;
                goto error_str;
        }
-       event->desc->nr_fields = 1;
-       event->desc->fields = field =
+       desc->nr_fields = 1;
+       desc->fields = field =
                kzalloc(1 * sizeof(struct lttng_event_field), GFP_KERNEL);
        field->name = "ip";
        field->type.atype = atype_integer;
@@ -63,11 +64,12 @@ int lttng_create_kprobe_event(const char *name, struct ltt_event *event)
        field->type.u.basic.integer.alignment = ltt_alignof(unsigned long);
        field->type.u.basic.integer.signedness = 0;
        field->type.u.basic.integer.reverse_byte_order = 0;
+       event->desc = desc;
 
        return 0;
 
 error_str:
-       kfree(event->desc);
+       kfree(desc);
        return ret;
 }