input/vcd: abort VCD import when timestamp counts backwards

[libsigrok.git] / src / input / vcd.c

diff --git a/src/input/vcd.c b/src/input/vcd.c
index 7614ba68a6f7bc192dab8c4f85cddccb91c34954..b9e9497dc8baf07b65370329179a615d2c175531 100644 (file)
--- a/src/input/vcd.c
+++ b/src/input/vcd.c
@@ -408,6 +408,10 @@ static void parse_contents(const struct sr_input *in, char *data)
                                inc->prev_timestamp = inc->skip;
                        } else if (timestamp == inc->prev_timestamp) {
                                /* Ignore repeated timestamps (e.g. sigrok outputs these) */
+                       } else if (timestamp < inc->prev_timestamp) {
+                               sr_err("Invalid timestamp: %" PRIu64 " (smaller than previous timestamp).", timestamp);
+                               inc->skip_until_end = TRUE;
+                               break;
                        } else {
                                if (inc->compress != 0 && timestamp - inc->prev_timestamp > inc->compress) {
                                        /* Compress long idle periods */