File: 00_PATCH_wx_len_overread.patch

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--- fstapi.cc
+++ fstapi.cc
@@ -6072,6 +6072,7 @@ for(;;)
                                                                 }
 
                                                         wx_len = snprintf(wx_buf, 32, "r%.16g", d);
+                                                        if (wx_len > 32 || wx_len < 0) wx_len = 32;
                                                         fstWritex(xc, wx_buf, wx_len);
                                                         }
                                                 }