--- brotli-1.0.9/c/dec/bit_reader.h.RHEL-32153-kBrotliBitMask-bounds	2020-08-27 16:12:55.000000000 +0200
+++ brotli-1.0.9/c/dec/bit_reader.h	2024-09-11 12:42:29.143308077 +0200
@@ -28,8 +28,10 @@ static BROTLI_INLINE uint32_t BitMask(ui
     /* Masking with this expression turns to a single
        "Unsigned Bit Field Extract" UBFX instruction on ARM. */
     return ~((0xFFFFFFFFu) << n);
-  } else {
+  } else if (n < 33) {
     return kBrotliBitMask[n];
+  } else {
+    return 0;
   }
 }