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    userns: Make the count of user namespaces per user · f6b2db1a
    Eric W. Biederman 提交于
    Add a structure that is per user and per user ns and use it to hold
    the count of user namespaces.  This makes prevents one user from
    creating denying service to another user by creating the maximum
    number of user namespaces.
    
    Rename the sysctl export of the maximum count from
    /proc/sys/userns/max_user_namespaces to /proc/sys/user/max_user_namespaces
    to reflect that the count is now per user.
    Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>
    f6b2db1a
user_namespace.h 3.3 KB