Issue #14160: TarFile.extractfile() failed to resolve symbolic links

when the links were not located in an archive subdirectory.

Lib/tarfile.py

@@ -2496,7 +2496,7 @@ class TarFile(object):
         """
         if tarinfo.issym():
             # Always search the entire archive.
-            linkname = os.path.dirname(tarinfo.name) + "/" + tarinfo.linkname
+            linkname = "/".join(filter(None, (os.path.dirname(tarinfo.name), tarinfo.linkname)))
             limit = None
         else:
             # Search the archive before the link, because a hard link is

Lib/test/test_tarfile.py

@@ -166,6 +166,9 @@ class UstarReadTest(ReadTest):
     def test_fileobj_symlink2(self):
         self._test_fileobj_link("./ustar/linktest2/symtype", "ustar/linktest1/regtype")
 
+    def test_issue14160(self):
+        self._test_fileobj_link("symtype2", "ustar/regtype")
+
 
 class CommonReadTest(ReadTest):
 

Misc/NEWS

@@ -56,6 +56,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
+  the links were not located in an archive subdirectory.
+
 - Issue #14638: pydoc now treats non-string __name__ values as if they
   were missing, instead of raising an error.