fix: compare position safely even in case of overflow

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>

diff --git a/src/common/consumer/consumer.c b/src/common/consumer/consumer.c
index 344a72eab51c6d946e3e8a3c2f7a35a63bc7a41a..2bfcef37ae674aedec8bc2b889d074654df70aaf 100644 (file)
--- a/src/common/consumer/consumer.c
+++ b/src/common/consumer/consumer.c
@@ -4179,7 +4179,7 @@ int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream)
 
        fprintf(stderr, "packet %lu, pos %lu\n", stream->key, consumed_pos);
        /* Rotate position not reached yet. */
-       if (consumed_pos < stream->rotate_position) {
+       if ((long) (consumed_pos - stream->rotate_position) < 0) {
                ret = 0;
                goto end;
        }