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authorKees Cook <kees.cook@canonical.com>2010-02-03 15:36:43 -0800
committerJames Morris <jmorris@namei.org>2010-02-04 14:20:12 +1100
commit002345925e6c45861f60db6f4fc6236713fd8847 (patch)
treed7849eafe1755116597166bbebf43e2bee86cb76 /security/selinux
parentselinux: allow MLS->non-MLS and vice versa upon policy reload (diff)
downloadlinux-dev-002345925e6c45861f60db6f4fc6236713fd8847.tar.xz
linux-dev-002345925e6c45861f60db6f4fc6236713fd8847.zip
syslog: distinguish between /proc/kmsg and syscalls
This allows the LSM to distinguish between syslog functions originating from /proc/kmsg access and direct syscalls. By default, the commoncaps will now no longer require CAP_SYS_ADMIN to read an opened /proc/kmsg file descriptor. For example the kernel syslog reader can now drop privileges after opening /proc/kmsg, instead of staying privileged with CAP_SYS_ADMIN. MAC systems that implement security_syslog have unchanged behavior. Signed-off-by: Kees Cook <kees.cook@canonical.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: John Johansen <john.johansen@canonical.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/hooks.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9a2ee845e9d4..a4862a0730fa 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -76,6 +76,7 @@
#include <linux/selinux.h>
#include <linux/mutex.h>
#include <linux/posix-timers.h>
+#include <linux/syslog.h>
#include "avc.h"
#include "objsec.h"
@@ -2049,11 +2050,11 @@ static int selinux_quota_on(struct dentry *dentry)
return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON);
}
-static int selinux_syslog(int type)
+static int selinux_syslog(int type, bool from_file)
{
int rc;
- rc = cap_syslog(type);
+ rc = cap_syslog(type, from_file);
if (rc)
return rc;