Comment 1 for bug 1829459

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Laurent Vivier (laurent-vivier) wrote :

PID namespace prevents to execute some syscalls, even if you use --map-root-user. This is managed at kernel level by the capabilities.

Could you try to do the exact same thing with the native architecture binaries in the chroot to see if the problem really comes from qemu-user?

Could you try to use the latest unshare version (util-linux package) that adds a "--keep-caps" parameter (v2.35-rc1) to preserve the capabilities?