builddeb: Fix rootless build in setuid/setgid directory

Building 5.10-rc1 in a setgid directory failed with the following
error:

dpkg-deb: error: control directory has bad permissions 2755 (must be
>=0755 and <=0775)

When building with fakeroot, the earlier chown call would have removed
the setgid bits, but in a rootless build they remain.

Fixes: 3e8541803624 ("builddeb: Enable rootless builds")
Cc: Guillem Jover <guillem@hadrons.org>
Signed-off-by: Sven Joachim <svenjoac@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 1b11f89..91a502b 100755 (executable)
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -45,6 +45,8 @@ create_package() {
        chmod -R go-w "$pdir"
        # in case we are in a restrictive umask environment like 0077
        chmod -R a+rX "$pdir"
+       # in case we build in a setuid/setgid directory
+       chmod -R ug-s "$pdir"
 
        # Create the package
        dpkg-gencontrol -p$pname -P"$pdir"