From ded98a40dc1bde5bfc3d582da9b40172fa66b61b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sat, 2 May 2026 16:13:52 +0900
Subject: pathname: Check for path encoding and NUL terminators

---
 file.c          | 9 ++++++++-
 internal/file.h | 1 +
 pathname.c      | 1 +
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/file.c b/file.c
index 53a1ac0934..db29642ac2 100644
--- a/file.c
+++ b/file.c
@@ -245,13 +245,20 @@ VALUE
 rb_get_path_check_convert(VALUE obj)
 {
     obj = file_path_convert(obj);
+    rb_get_path_check_no_convert(obj);
+    return rb_str_new_frozen(obj);
+}
 
+/* TODO: name */
+VALUE
+rb_get_path_check_no_convert(VALUE obj)
+{
     check_path_encoding(obj);
     if (!rb_str_to_cstr(obj)) {
         rb_raise(rb_eArgError, "path name contains null byte");
     }
 
-    return rb_str_new_frozen(obj);
+    return obj;
 }
 
 VALUE
diff --git a/internal/file.h b/internal/file.h
index 9c192ff4d1..29e9cdf4b9 100644
--- a/internal/file.h
+++ b/internal/file.h
@@ -23,6 +23,7 @@ VALUE rb_file_expand_path_fast(VALUE, VALUE);
 VALUE rb_file_expand_path_internal(VALUE, VALUE, int, int, VALUE);
 VALUE rb_get_path_check_to_string(VALUE);
 VALUE rb_get_path_check_convert(VALUE);
+VALUE rb_get_path_check_no_convert(VALUE);
 int ruby_is_fd_loadable(int fd);
 
 RUBY_SYMBOL_EXPORT_BEGIN
diff --git a/pathname.c b/pathname.c
index 5f12d13767..28e25512a1 100644
--- a/pathname.c
+++ b/pathname.c
@@ -11,6 +11,7 @@ get_strpath(VALUE obj)
     strpath = rb_ivar_get(obj, id_at_path);
     if (!RB_TYPE_P(strpath, T_STRING))
         rb_raise(rb_eTypeError, "unexpected @path");
+    rb_get_path_check_no_convert(strpath);
     return strpath;
 }
 
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