I can confirm the patch works. I've tested on a Debian Bullseye build with cifs-utils 7.0 from https://ftp.samba.org/pub/linux-cifs/cifs-utils/
I refreshed patch 001. Added the patch shown buy Helmut. And I builded against Debian Bullseye with parallel=7 and parallel=1 Only I can't upload the sources to salsa.. Sorry. @Michael Tokarev can you add this one? I can put the build and logs online if you want. Greetz, Louis