qemu-ga guest-exec & SELinux

[Marc-André Lureau]

Hi!

https://bugzilla.redhat.com/show_bug.cgi?id=2093355 ("AVCs when trying to execute a command through qemu-ga ("guest-exec" command)") describes an issue with fedora/rhel SELinux rules, where some program executions are denied.

qemu-ga has "virt_qemu_ga_t" context, and is not allowed to execute binaries that are not "bin_t", iiuc. The suggestion from Renaud Métrich is for qemu-ga exec command to launch the user program through an helper program that would have the virt_qemu_ga_unconfined_exec_t context, and appropriate rules in selinux (similar to fsfreeze-hook rules), so any program can be executed. qemu-ga would thus ship and use that helper, in all OS, to avoid varying code paths.

Does that sound reasonable or should we try to find a solution with SELinux rules instead?

thanks

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Marc-André Lureau