Fix: ust-consumer: metadata cache lock not taken when sampling max offset

[lttng-tools.git] / src / common / ust-consumer / ust-consumer.c

diff --git a/src/common/ust-consumer/ust-consumer.c b/src/common/ust-consumer/ust-consumer.c
index 1283d951c11240be6fd1e30ff3a4f808e9534514..f3ea024dd6330e93cf0d38b0a28a78d1daa650b4 100644 (file)
--- a/src/common/ust-consumer/ust-consumer.c
+++ b/src/common/ust-consumer/ust-consumer.c
@@ -3015,7 +3015,9 @@ int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream)
                uint64_t contiguous, pushed;
 
                /* Ease our life a bit. */
+               pthread_mutex_lock(&stream->chan->metadata_cache->lock);
                contiguous = stream->chan->metadata_cache->max_offset;
+               pthread_mutex_unlock(&stream->chan->metadata_cache->lock);
                pushed = stream->ust_metadata_pushed;
 
                /*