1 files changed, 5 insertions, 0 deletions
diff --git a/qemu-img.c b/qemu-img.c
index 5d824fc15f..c88f412333 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3092,6 +3092,11 @@ static int img_map(int argc, char **argv)
     }
 
     length = blk_getlength(blk);
+    if (length < 0) {
+        error_report("Failed to get size for '%s'", filename);
+        return 1;
+    }
+
     while (curr.start + curr.length < length) {
         int64_t offset = curr.start + curr.length;
         int64_t n;