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apparmor: update cap audit to check SECURITY_CAP_NOAUDIT

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apparmor should be checking the SECURITY_CAP_NOAUDIT constant. Also
in complain mode make it so apparmor can elect to log a message,
informing of the check.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2017-01-16 00:43:08 -08:00
parent 31f75bfecd
commit 12eb87d50b
1 changed files with 10 additions and 6 deletions
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16
security/apparmor/capability.c
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@ -15,6 +15,7 @@
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/gfp.h>
#include <linux/security.h>
#include "include/apparmor.h"
#include "include/capability.h"
@ -55,6 +56,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
* audit_caps - audit a capability
* @profile: profile being tested for confinement (NOT NULL)
* @cap: capability tested
@audit: whether an audit record should be generated
* @error: error code returned by test
*
* Do auditing of capability and handle, audit/complain/kill modes switching
@ -62,13 +64,16 @@ static void audit_cb(struct audit_buffer *ab, void *va)
*
* Returns: 0 or sa->error on success, error code on failure
*/
static int audit_caps(struct aa_profile *profile, int cap, int error)
static int audit_caps(struct aa_profile *profile, int cap, int audit,
int error)
{
struct audit_cache *ent;
int type = AUDIT_APPARMOR_AUTO;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_CAP, OP_CAPABLE);
sa.u.cap = cap;
aad(&sa)->error = error;
if (audit == SECURITY_CAP_NOAUDIT)
aad(&sa)->info = "optional: no audit";
if (likely(!error)) {
/* test if auditing is being forced */
@ -129,11 +134,10 @@ int aa_capable(struct aa_profile *profile, int cap, int audit)
{
int error = profile_capable(profile, cap);
if (!audit) {
if (COMPLAIN_MODE(profile))
return complain_error(error);
return error;
if (audit == SECURITY_CAP_NOAUDIT) {
if (!COMPLAIN_MODE(profile))
return error;
}
return audit_caps(profile, cap, error);
return audit_caps(profile, cap, audit, error);
}