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-rw-r--r--man7/user_namespaces.710
1 files changed, 7 insertions, 3 deletions
diff --git a/man7/user_namespaces.7 b/man7/user_namespaces.7
index 54f5d6922e..25c51228d6 100644
--- a/man7/user_namespaces.7
+++ b/man7/user_namespaces.7
@@ -311,11 +311,15 @@ can't be used to write to nonzero offsets in the file).
The range of user IDs (group IDs)
specified in each line cannot overlap with the ranges
in any other lines.
-In the current implementation (Linux 3.8), this requirement is
-satisfied by a simplistic implementation that imposes the further
+In the initial implementation (Linux 3.8), this requirement was
+satisfied by a simplistic implementation that imposed the further
requirement that
the values in both field 1 and field 2 of successive lines must be
-in ascending numerical order.
+in ascending numerical order,
+which prevented some otherwise valid maps from being created.
+Linux 3.9 and later
+.\" commit 0bd14b4fd72afd5df41e9fd59f356740f22fceba
+fix this limitation, allowing any valid set of nonoverlapping maps.
.IP *
The mapped user IDs (group IDs) must in turn have a mapping
in the parent user namespace.