Hi folks, using dd if=ubuntu-20.10-desktop-amd64.iso bs=64k of=/dev/sdx on 5.11.10 to write a live iso to USB stick dd never returns. lsof shows that the file handles for source and destination have been closed, but dd doesn't exit. It cannot be interrupted or killed, either. If I run "sync" in another terminal, then this gets stuck as well. I could reproduce this problem using Debian's 5.10.13-1 and 5.11.{9,10} built from the sources in git, on Debian 10 and Unstable. I tried to copy the ubuntu live iso and the RHEL 8.3 installer iso. 3 different USB sticks. There is no such problem using Debian's 4.19.0-16-amd64 kernel on Debian 10. Can anybody reproduce this as well? Regards Harri