Fix: metadata stream leak, missing list removal and locking

[lttng-modules.git] / lttng-abi.c

diff --git a/lttng-abi.c b/lttng-abi.c
index 0996f2f198532924704266d6014ab98cd1f55318..64ea99da27fc6e126358f223f25972d74bac301f 100644 (file)
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -1090,8 +1090,12 @@ int lttng_metadata_ring_buffer_release(struct inode *inode, struct file *file)
        struct lttng_metadata_stream *stream = file->private_data;
        struct lib_ring_buffer *buf = stream->priv;
 
+       mutex_lock(&stream->metadata_cache->lock);
+       list_del(&stream->list);
+       mutex_unlock(&stream->metadata_cache->lock);
        kref_put(&stream->metadata_cache->refcount, metadata_cache_destroy);
        module_put(stream->transport->owner);
+       kfree(stream);
        return lib_ring_buffer_release(inode, file, buf);
 }
 
@@ -1243,8 +1247,10 @@ int lttng_abi_open_metadata_stream(struct file *channel_file)
        if (ret < 0)
                goto fd_error;
 
+       mutex_lock(&session->metadata_cache->lock);
        list_add(&metadata_stream->list,
                &session->metadata_cache->metadata_stream);
+       mutex_unlock(&session->metadata_cache->lock);
        return ret;
 
 fd_error: