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Date: Thu, 9 Dec 2010 17:30:50 +0000 From: "Serge E. Hallyn" <serge@...lyn.com> To: LSM <linux-security-module@...r.kernel.org> Cc: containers@...ts.linux-foundation.org, Kees Cook <kees.cook@...onical.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, kernel list <linux-kernel@...r.kernel.org> Subject: [RFC PATCH 3/4] allow sethostname in a container To test this, you can: 1. clone a new user namespace without a new uts namespace. You can NOT set hostname. 2. clone both a new user and uts namespace. You can set hostname. Signed-off-by: Serge E. Hallyn <serge.hallyn@...onical.com> --- kernel/sys.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/sys.c b/kernel/sys.c index 2745dcd..9b9b03b 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1171,7 +1171,7 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len) int errno; char tmp[__NEW_UTS_LEN]; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(current->nsproxy->uts_ns->user_ns, CAP_SYS_ADMIN)) return -EPERM; if (len < 0 || len > __NEW_UTS_LEN) return -EINVAL; -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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