From: Nicolas Belouin Subject: [RFC PATCH 1/2] security, capabilities: create CAP_TRUSTED Date: Sat, 21 Oct 2017 15:45:57 +0200 Message-ID: <20171021134558.21195-1-nicolas@belouin.fr> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Nicolas Belouin To: Jan Kara , "Theodore Ts'o" , Andreas Dilger , Jaegeuk Kim , Chao Yu , David Woodhouse , Dave Kleikamp , Mark Fasheh , Joel Becker , Miklos Szeredi , Phillip Lougher , Richard Weinberger , Artem Bityutskiy , Adrian Hunter , Alexander Viro , Serge Hallyn , Paul Moore , Stephen Smalley , Eric Paris , James Morris , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infrad Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org List-Id: linux-ext4.vger.kernel.org with CAP_SYS_ADMIN being bloated, the usefulness of using it to flag a process to be entrusted for e.g reading and writing trusted xattr is near zero. CAP_TRUSTED aims to provide userland with a way to mark a process as entrusted to do specific (not specially admin-centered) actions. It would for example allow a process to red/write the trusted xattrs. Signed-off-by: Nicolas Belouin --- include/uapi/linux/capability.h | 6 +++++- security/selinux/include/classmap.h | 5 +++-- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/include/uapi/linux/capability.h b/include/uapi/linux/capability.h index ce230aa6d928..27e457b93c84 100644 --- a/include/uapi/linux/capability.h +++ b/include/uapi/linux/capability.h @@ -369,7 +369,11 @@ struct vfs_ns_cap_data { #define CAP_SYS_MOUNT 38 -#define CAP_LAST_CAP CAP_SYS_MOUNT +/* Allow read/write trusted xattr */ + +#define CAP_TRUSTED 39 + +#define CAP_LAST_CAP CAP_TRUSTED #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h index a873dce97fd5..f5dc8e109f5a 100644 --- a/security/selinux/include/classmap.h +++ b/security/selinux/include/classmap.h @@ -24,9 +24,10 @@ "audit_control", "setfcap" #define COMMON_CAP2_PERMS "mac_override", "mac_admin", "syslog", \ - "wake_alarm", "block_suspend", "audit_read", "sys_mount" + "wake_alarm", "block_suspend", "audit_read", "sys_mount", \ + "trusted" -#if CAP_LAST_CAP > CAP_SYS_MOUNT +#if CAP_LAST_CAP > CAP_TRUSTED #error New capability defined, please update COMMON_CAP2_PERMS. #endif -- 2.14.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/