kernel: core_hook: earlier escape_to_root already-root check

micro-opt

Signed-off-by: backslashxx <[email protected]>

Author: backslashxx

kernel/core_hook.c

@@ -125,15 +125,14 @@ void escape_to_root(void)
 {
 	struct cred *cred;
 
-	cred = prepare_creds();
-	if (!cred) {
-		pr_warn("prepare_creds failed!\n");
+	if (current_euid().val == 0) {
+		pr_warn("Already root, don't escape!\n");
 		return;
 	}
 
-	if (cred->euid.val == 0) {
-		pr_warn("Already root, don't escape!\n");
-		abort_creds(cred);
+	cred = prepare_creds();
+	if (!cred) {
+		pr_warn("prepare_creds failed!\n");
 		return;
 	}