Fix: consumer snapshot: handle unsigned long overflow

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

diff --git a/src/common/kernel-consumer/kernel-consumer.c b/src/common/kernel-consumer/kernel-consumer.c
index ccca69e0eaded03676acf8278ac30413991b6bbc..22f18c157585ff550887563962a4f4f3f58b7ec0 100644 (file)
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -235,7 +235,7 @@ int lttng_kconsumer_snapshot_channel(uint64_t key, char *path,
                                produced_pos, nb_packets_per_stream,
                                stream->max_sb_size);
 
-               while (consumed_pos < produced_pos) {
+               while ((long) (consumed_pos - produced_pos) < 0) {
                        ssize_t read_len;
                        unsigned long len, padded_len;