1 files changed, 8 insertions, 1 deletions
diff --git a/sysdeps/unix/readdir.c b/sysdeps/unix/readdir.c
index 00446a2d2b..5d0c40fdc1 100644
--- a/sysdeps/unix/readdir.c
+++ b/sysdeps/unix/readdir.c
@@ -40,6 +40,8 @@ readdir (DIR *dirp)
       return NULL;
     }
 
+  __libc_lock_lock (dirp->lock);
+
   do
     {
       size_t reclen;
@@ -62,7 +64,10 @@ readdir (DIR *dirp)
 	  base = dirp->filepos;
 	  bytes = __getdirentries (dirp->fd, dirp->data, maxread, &base);
 	  if (bytes <= 0)
-	    return NULL;
+	    {
+	      dp = NULL;
+	      break;
+	    }
 	  dirp->size = (size_t) bytes;
 
 	  /* Reset the offset into the buffer.  */
@@ -96,5 +101,7 @@ readdir (DIR *dirp)
       /* Skip deleted files.  */
     } while (dp->d_ino == 0);
 
+  __libc_lock_unlock (dirp->lock);
+
   return dp;
 }