Re: [PATCH] userns/capability: Add user namespace capability
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From: Richard Weinberger <hidden>
Date: 2015-10-17 20:17:41
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On Sat, Oct 17, 2015 at 5:58 PM, Tobias Markus [off-list ref] wrote:
One question remains though: Does this break userspace executables that expect being able to create user namespaces without priviledge? Since creating user namespaces without CAP_SYS_ADMIN was not possible before Linux 3.8, programs should already expect a potential EPERM upon calling clone. Since creating a user namespace without CAP_SYS_USER_NS would also cause EPERM, we should be on the safe side.
In case of doubt, yes it will break existing software. Hiding user namespaces behind CAP_SYS_USER_NS will not magically make them secure. -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html