Fix invalid read

diff --git a/ext/standard/file.c b/ext/standard/file.c
index ae4fcb1f4a0760f8ed3aa606cc784654a30f9151..d83f91180505131c29c72a736f7868235c6395c7 100644 (file)
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -785,7 +785,7 @@ parse_eol:
                } else {
                        do {
                                int windows_eol = 0;
-                               if (eol_marker == '\n' && *(p - 1) == '\r') {
+                               if (p != target_buf && eol_marker == '\n' && *(p - 1) == '\r') {
                                        windows_eol++;
                                }
                                if (skip_blank_lines && !(p-s-windows_eol)) {