Android overwriting parameters in procfs of host system

[horror-proton]

Describe the bug

❯ cat /proc/sys/kernel/perf_event_paranoid
-1

❯ docker run docker run -itd --rm --privileged redroid/redroid:11.0.0-latest ...

❯ cat /proc/sys/kernel/perf_event_paranoid
3

the parameter shouldn’t get overwritten as android works fine with the old value

make sure the required kernel modules present

• grep binder /proc/filesystems
• grep ashmem /proc/misc

collect debug logs 8KJkOFa2mJ.zip

[zhouziyang]

redroid is a pure container solution (share same kernel with your Host), and some are not isolated (procfs, sysfs etc.). you may try Android Emulator like (VM based) solutions if strict isolation wanted.

BTW, can bind mount /proc/sys/kernel/perf_event_paranoid to something else. Thus, redroid container will not change your host settings.

[AAGaming00]

How would you bind mount this? Trying volumes in compose says "/var/lib/docker/overlay2/fd40fe9a6c4490262996b1a4086f056d1daed47dab4db55c77308d2d7c69b9a9/merged/proc/sys/kernel/perf_event_paranoid" cannot be mounted because it is inside /proc: unknown

[AAGaming00]

Unless you meant bind mount on the host

[zhouziyang]

You can bind mount during start the container -v xxx:/proc/some_file. Anyway, try some VM like solutions (Android Emulator etc.) if strict isolation required.