efivars: properly NUL terminate EFI variables when reading

A follow-up for 35b9eb0a72.
2019-12-16 15:35:31 +01:00
parent e40b4caa1f
commit 861f178905
1 changed files with 2 additions and 2 deletions
@@ -93,8 +93,8 @@ int efi_get_variable(
                assert(n <= st.st_size - 4);

                /* Always NUL terminate (2 bytes, to protect UTF-16) */
-                ((char*) buf)[n - 4] = 0;
-                ((char*) buf)[n - 4 + 1] = 0;
+                ((char*) buf)[n] = 0;
+                ((char*) buf)[n + 1] = 0;
        } else
                /* Assume that the reported size is accurate */
                n = st.st_size - 4;