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b376c3e1b6
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2 Commits

Author SHA1 Message Date
Eric W. Biederman
b376c3e1b6 userns: Add a limit on the number of user namespaces 
Export the export the maximum number of user namespaces as
/proc/sys/userns/max_user_namespaces.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
 2016-08-08 13:41:24 -05:00
Eric W. Biederman
dbec28460a userns: Add per user namespace sysctls. 
Limit per userns sysctls to only be opened for write by a holder
of CAP_SYS_RESOURCE.

Add all of the necessary boilerplate for having per user namespace
sysctls.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
 2016-08-08 13:18:58 -05:00