diff --git a/kernel/arch.h b/kernel/arch.h
index e92724e7..4e341ae7 100644
--- a/kernel/arch.h
+++ b/kernel/arch.h
@@ -4,7 +4,6 @@
 
 #if defined(__aarch64__)
 
-#define __PT_REGS_CAST(x) ((const struct user_pt_regs *)(x))
 #define __PT_PARM1_REG regs[0]
 #define __PT_PARM2_REG regs[1]
 #define __PT_PARM3_REG regs[2]
diff --git a/kernel/sucompat.c b/kernel/sucompat.c
index 534bfb0b..88f7423f 100644
--- a/kernel/sucompat.c
+++ b/kernel/sucompat.c
@@ -54,9 +54,11 @@ static int faccessat_handler_pre(struct kprobe *p, struct pt_regs *regs) {
     }
     if (!memcmp(filename->name, su, sizeof(su))) {
         pr_info("faccessat su->sh!\n");
-        regs->regs[1] = sh_user_path();
+        PT_REGS_PARM2(regs) = sh_user_path();
     }
 
+    putname(filename);
+
     return 0;
 }
 
@@ -76,9 +78,11 @@ static int newfstatat_handler_pre(struct kprobe *p, struct pt_regs *regs) {
     }
     if (!memcmp(filename->name, su, sizeof(su))) {
         pr_info("newfstatat su->sh!\n");
-        regs->regs[1] = sh_user_path();
+        PT_REGS_PARM2(regs) = sh_user_path();
     }
 
+    putname(filename);
+
     return 0;
 }
 
@@ -104,6 +108,8 @@ static int execve_handler_pre(struct kprobe *p, struct pt_regs *regs) {
         escape_to_root(false);
     }
 
+    putname(filename);
+
     return 0;
 }