util/cutils: Change qemu_strtosz*() from int64_t to uint64_t

This will permit its use in parse_option_size().

Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86)
Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core)
Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core)
Cc: qemu-block@nongnu.org (open list:Block layer core)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1487708048-2131-24-git-send-email-armbru@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/qemu-img.c b/qemu-img.c
index 37d1afb..df3aefd 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -371,12 +371,15 @@ static int add_old_style_options(const char *fmt, QemuOpts *opts,
 static int64_t cvtnum(const char *s)
 {
     int err;
-    int64_t value;
+    uint64_t value;
 
     err = qemu_strtosz(s, NULL, &value);
     if (err < 0) {
         return err;
     }
+    if (value > INT64_MAX) {
+        return -ERANGE;
+    }
     return value;
 }