mirror of https://github.com/mkerrisk/man-pages
user_namespaces.7: Document maximum nesting depth for user namespaces
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -63,6 +63,17 @@ with the
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.BR CLONE_NEWUSER
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.BR CLONE_NEWUSER
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flag.
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flag.
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The kernel imposes (since version 3.11) a limit of 32 nested levels of
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.\" commit 8742f229b635bf1c1c84a3dfe5e47c814c20b5c8
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user namespaces.
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.\" FIXME Explain the rationale for this limit. (What is the rationale?)
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Calls to
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.BR unshare (2)
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or
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.BR clone (2)
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that would cause this limit to be exceeded fail with the error
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.BR EUSERS .
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Each process is a member of exactly one user namespace.
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Each process is a member of exactly one user namespace.
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A process created via
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A process created via
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.BR fork (2)
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.BR fork (2)
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