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Lennart Poettering
98e4fcec36
dynamic-user: don't use a UID that currently owns IPC objects (#6962)
This fixes a mostly theoretical potential security hole: if for some reason we failed to remove IPC objects created for a dynamic user (maybe because a MAC/SElinux erronously prohibited), then we should not hand out the same UID again until they are successfully removed. With this commit we'll enumerate the IPC objects currently existing, and step away from using a UID for the dynamic UID logic if there are any matching it.
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