Fix bwlimit multiplication overflow. Fixes bug 8375.

diff --git a/io.c b/io.c
index 4fb78aab77fa060b4b9c81567089ac22f5540724..7cb3be137c8c8862c9694075df13940004dd19a8 100644 (file)
--- a/io.c
+++ b/io.c
@@ -1936,7 +1936,7 @@ static void sleep_for_bwlimit(int bytes_written)
        if (prior_tv.tv_sec) {
                elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC
                             + (start_tv.tv_usec - prior_tv.tv_usec);
-               total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024);
+               total_written -= (int64)elapsed_usec * bwlimit / (ONE_SEC/1024);
                if (total_written < 0)
                        total_written = 0;
        }