path: root/include/linux/capability.h
diff options
authorSerge E. Hallyn <serge@hallyn.com>2010-11-25 17:11:32 +0000
committerJames Morris <jmorris@namei.org>2010-11-29 08:35:12 +1100
commitce6ada35bdf710d16582cc4869c26722547e6f11 (patch)
treec2b5fd46c883f4b7285b191bac55940022662b43 /include/linux/capability.h
parent1d6d75684d869406e5bb2ac5d3ed9454f52d0cab (diff)
security: Define CAP_SYSLOG
Privileged syslog operations currently require CAP_SYS_ADMIN. Split this off into a new CAP_SYSLOG privilege which we can sanely take away from a container through the capability bounding set. With this patch, an lxc container can be prevented from messing with the host's syslog (i.e. dmesg -c). Changelog: mar 12 2010: add selinux capability2:cap_syslog perm Changelog: nov 22 2010: . port to new kernel . add a WARN_ONCE if userspace isn't using CAP_SYSLOG Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Acked-by: Andrew G. Morgan <morgan@kernel.org> Acked-By: Kees Cook <kees.cook@canonical.com> Cc: James Morris <jmorris@namei.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: "Christopher J. PeBenito" <cpebenito@tresys.com> Cc: Eric Paris <eparis@parisplace.org> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include/linux/capability.h')
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/capability.h b/include/linux/capability.h
index 90012b9ddbf3..fb16a3699b99 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -246,7 +246,6 @@ struct cpu_vfs_cap_data {
/* Allow configuration of the secure attention key */
/* Allow administration of the random device */
/* Allow examination and configuration of disk quotas */
-/* Allow configuring the kernel's syslog (printk behaviour) */
/* Allow setting the domainname */
/* Allow setting the hostname */
/* Allow calling bdflush() */
@@ -352,7 +351,11 @@ struct cpu_vfs_cap_data {
#define CAP_MAC_ADMIN 33
+/* Allow configuring the kernel's syslog (printk behaviour) */
+#define CAP_SYSLOG 34
#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)