On Sat, Aug 29, 2020 at 10:13 PM Shengjing Zhu <z...@debian.org> wrote: > > Source: linux > Version: 5.7.10-1 > Severity: normal > > Hi, > > After enabling overlayfs for userns, I find it doesn't work as expected. > > $ cat /sys/module/overlay/parameters/permit_mounts_in_userns > Y > > zsj@debian:~/test$ pwd > /home/zsj/test > zsj@debian:~/test$ tree > . > ├── lower > │ └── a > │ └── a > ├── merged > ├── upper > └── work > > zsj@debian:~/test$ unshare -m -U -r > root@debian:~/test# mount -t overlay -o > rw,lowerdir=/home/zsj/test/lower,upperdir=/home/zsj/test/upper,workdir=/home/zsj/test/work > overlay /home/zsj/test/merged > root@debian:~/test# rm -rf merged/a > rm: cannot remove 'merged/a': Input/output error > > -- System Information: > Debian Release: bullseye/sid > APT prefers testing > APT policy: (500, 'testing') > Architecture: amd64 (x86_64) > > Kernel: Linux 5.7.0-2-amd64 (SMP w/4 CPU threads) > Kernel taint flags: TAINT_USER, TAINT_FIRMWARE_WORKAROUND > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not > set > Shell: /bin/sh linked to /usr/bin/dash > Init: systemd (via /run/systemd/system)
If I upgrade a debian10 VM to testing, it seems to work. However if I boot a new debian testing VM, it seems not to work. Both VMs are downloaded from http://cdimage.debian.org/cdimage/cloud/ What can be the difference here? I'm lost on debugging this.. -- Shengjing Zhu
