On 5/13/20 8:36 AM, Eyal Moscovici wrote:
The code handles this case correctly we merely skip the loop. However it

Grammar suggestion: s/correctly we/correctly: we/

is probably best to return an explicit error.

Reviewed-by: Eric Blake <ebl...@redhat.com>

R-b still stands.

Acked-by: Mark Kanda <mark.ka...@oracle.com>
Signed-off-by: Eyal Moscovici <eyal.moscov...@oracle.com>
---
  qemu-img.c | 5 +++++
  1 file changed, 5 insertions(+)

diff --git a/qemu-img.c b/qemu-img.c
index cc2e4a3799..23e90a99e1 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3091,6 +3091,11 @@ 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;


--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org


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