apparmor: update aa_audit_file() to use labels

Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/domain.c

@@ -518,6 +518,7 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 audit:
 	error = aa_audit_file(profile, &perms, OP_EXEC, MAY_EXEC, name,
 			      new_profile ? new_profile->base.hname : NULL,
+			      new_profile ? &new_profile->label : NULL,
 			      cond.uid, info, error);
 
 cleanup:
@@ -694,7 +695,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, int flags)
 audit:
 	if (!(flags & AA_CHANGE_TEST))
 		error = aa_audit_file(profile, &perms, OP_CHANGE_HAT,
-				      AA_MAY_CHANGEHAT, NULL, target,
+				      AA_MAY_CHANGEHAT, NULL, target, NULL,
 				      GLOBAL_ROOT_UID, info, error);
 
 out:
@@ -802,7 +803,8 @@ int aa_change_profile(const char *fqname, int flags)
 audit:
 	if (!(flags & AA_CHANGE_TEST))
 		error = aa_audit_file(profile, &perms, op, request, NULL,
-				      fqname, GLOBAL_ROOT_UID, info, error);
+				      fqname, NULL, GLOBAL_ROOT_UID, info,
+				      error);
 
 	aa_put_profile(target);
 	aa_put_label(label);

security/apparmor/file.c

@@ -75,7 +75,11 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
 				 from_kuid(&init_user_ns, aad(sa)->fs.ouid));
 	}
 
-	if (aad(sa)->fs.target) {
+	if (aad(sa)->peer) {
+		audit_log_format(ab, " target=");
+		aa_label_xaudit(ab, labels_ns(aad(sa)->label), aad(sa)->peer,
+				FLAG_VIEW_SUBNS, GFP_ATOMIC);
+	} else if (aad(sa)->fs.target) {
 		audit_log_format(ab, " target=");
 		audit_log_untrustedstring(ab, aad(sa)->fs.target);
 	}
@@ -85,11 +89,11 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
  * aa_audit_file - handle the auditing of file operations
  * @profile: the profile being enforced  (NOT NULL)
  * @perms: the permissions computed for the request (NOT NULL)
- * @gfp: allocation flags
  * @op: operation being mediated
  * @request: permissions requested
  * @name: name of object being mediated (MAYBE NULL)
  * @target: name of target (MAYBE NULL)
+ * @tlabel: target label (MAY BE NULL)
  * @ouid: object uid
  * @info: extra information message (MAYBE NULL)
  * @error: 0 if operation allowed else failure error code
@@ -98,7 +102,8 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
  */
 int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,
 		  const char *op, u32 request, const char *name,
-		  const char *target, kuid_t ouid, const char *info, int error)
+		  const char *target, struct aa_label *tlabel,
+		  kuid_t ouid, const char *info, int error)
 {
 	int type = AUDIT_APPARMOR_AUTO;
 	DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_TASK, op);
@@ -107,6 +112,7 @@ int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,
 	aad(&sa)->request = request;
 	aad(&sa)->name = name;
 	aad(&sa)->fs.target = target;
+	aad(&sa)->peer = tlabel;
 	aad(&sa)->fs.ouid = ouid;
 	aad(&sa)->info = info;
 	aad(&sa)->error = error;
@@ -139,7 +145,7 @@ int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,
 			aad(&sa)->request &= ~perms->quiet;
 
 		if (!aad(&sa)->request)
-			return COMPLAIN_MODE(profile) ? 0 : aad(&sa)->error;
+			return aad(&sa)->error;
 	}
 
 	aad(&sa)->denied = aad(&sa)->request & ~perms->allow;
@@ -295,7 +301,7 @@ int aa_path_perm(const char *op, struct aa_profile *profile,
 		if (request & ~perms.allow)
 			error = -EACCES;
 	}
-	error = aa_audit_file(profile, &perms, op, request, name, NULL,
+	error = aa_audit_file(profile, &perms, op, request, name, NULL, NULL,
 			      cond->uid, info, error);
 	put_buffers(buffer);
 
@@ -425,7 +431,7 @@ int aa_path_link(struct aa_profile *profile, struct dentry *old_dentry,
 
 audit:
 	error = aa_audit_file(profile, &lperms, OP_LINK, request,
-			      lname, tname, cond.uid, info, error);
+			      lname, tname, NULL, cond.uid, info, error);
 	put_buffers(buffer, buffer2);
 
 	return error;

security/apparmor/include/file.h

@@ -162,7 +162,8 @@ static inline u16 dfa_map_xindex(u16 mask)
 
 int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,
 		  const char *op, u32 request, const char *name,
-		  const char *target, kuid_t ouid, const char *info, int error);
+		  const char *target, struct aa_label *tlabel, kuid_t ouid,
+		  const char *info, int error);
 
 /**
  * struct aa_file_rules - components used for file rule permissions