userns: Convert apparmor to use kuid and kgid where appropriate

Cc: John Johansen <john.johansen@canonical.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

init/Kconfig

@@ -964,7 +964,6 @@ config UIDGID_CONVERTED
 
 	# Security modules
 	depends on SECURITY_TOMOYO = n
-	depends on SECURITY_APPARMOR = n
 
 config UIDGID_STRICT_TYPE_CHECKS
 	bool "Require conversions between uid/gids and their internal representation"

security/apparmor/domain.c

@@ -721,7 +721,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
 	if (!permtest)
 		error = aa_audit_file(profile, &perms, GFP_KERNEL,
 				      OP_CHANGE_HAT, AA_MAY_CHANGEHAT, NULL,
-				      target, 0, info, error);
+				      target, GLOBAL_ROOT_UID, info, error);
 
 out:
 	aa_put_profile(hat);
@@ -848,7 +848,7 @@ int aa_change_profile(const char *ns_name, const char *hname, bool onexec,
 audit:
 	if (!permtest)
 		error = aa_audit_file(profile, &perms, GFP_KERNEL, op, request,
-				      name, hname, 0, info, error);
+				      name, hname, GLOBAL_ROOT_UID, info, error);
 
 	aa_put_namespace(ns);
 	aa_put_profile(target);

security/apparmor/file.c

@@ -65,7 +65,7 @@ static void audit_file_mask(struct audit_buffer *ab, u32 mask)
 static void file_audit_cb(struct audit_buffer *ab, void *va)
 {
 	struct common_audit_data *sa = va;
-	uid_t fsuid = current_fsuid();
+	kuid_t fsuid = current_fsuid();
 
 	if (sa->aad->fs.request & AA_AUDIT_FILE_MASK) {
 		audit_log_format(ab, " requested_mask=");
@@ -76,8 +76,10 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
 		audit_file_mask(ab, sa->aad->fs.denied);
 	}
 	if (sa->aad->fs.request & AA_AUDIT_FILE_MASK) {
-		audit_log_format(ab, " fsuid=%d", fsuid);
-		audit_log_format(ab, " ouid=%d", sa->aad->fs.ouid);
+		audit_log_format(ab, " fsuid=%d",
+				 from_kuid(&init_user_ns, fsuid));
+		audit_log_format(ab, " ouid=%d",
+				 from_kuid(&init_user_ns, sa->aad->fs.ouid));
 	}
 
 	if (sa->aad->fs.target) {
@@ -103,7 +105,7 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
  */
 int aa_audit_file(struct aa_profile *profile, struct file_perms *perms,
 		  gfp_t gfp, int op, u32 request, const char *name,
-		  const char *target, uid_t ouid, const char *info, int error)
+		  const char *target, kuid_t ouid, const char *info, int error)
 {
 	int type = AUDIT_APPARMOR_AUTO;
 	struct common_audit_data sa;
@@ -201,7 +203,7 @@ static struct file_perms compute_perms(struct aa_dfa *dfa, unsigned int state,
 	 */
 	perms.kill = 0;
 
-	if (current_fsuid() == cond->uid) {
+	if (uid_eq(current_fsuid(), cond->uid)) {
 		perms.allow = map_old_perms(dfa_user_allow(dfa, state));
 		perms.audit = map_old_perms(dfa_user_audit(dfa, state));
 		perms.quiet = map_old_perms(dfa_user_quiet(dfa, state));

security/apparmor/include/audit.h

@@ -125,7 +125,7 @@ struct apparmor_audit_data {
 			const char *target;
 			u32 request;
 			u32 denied;
-			uid_t ouid;
+			kuid_t ouid;
 		} fs;
 	};
 };

security/apparmor/include/file.h

@@ -71,7 +71,7 @@ struct path;
 
 /* need to make conditional which ones are being set */
 struct path_cond {
-	uid_t uid;
+	kuid_t uid;
 	umode_t mode;
 };
 
@@ -146,7 +146,7 @@ static inline u16 dfa_map_xindex(u16 mask)
 
 int aa_audit_file(struct aa_profile *profile, struct file_perms *perms,
 		  gfp_t gfp, int op, u32 request, const char *name,
-		  const char *target, uid_t ouid, const char *info, int error);
+		  const char *target, kuid_t ouid, const char *info, int error);
 
 /**
  * struct aa_file_rules - components used for file rule permissions