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-rw-r--r--block/nbd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/nbd.c b/block/nbd.c
index c297336ffc..65a4f56924 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -2002,7 +2002,7 @@ static void nbd_refresh_filename(BlockDriverState *bs)
         len = snprintf(bs->exact_filename, sizeof(bs->exact_filename),
                        "nbd://%s:%s", host, port);
     }
-    if (len > sizeof(bs->exact_filename)) {
+    if (len >= sizeof(bs->exact_filename)) {
         /* Name is too long to represent exactly, so leave it empty. */
         bs->exact_filename[0] = '\0';
     }