From 81bb838ef7ce492a3ea9d097a781ae1ed7f318b9 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 7 Feb 2018 23:45:46 +0900
Subject: [PATCH] frames: Bug fix: crash at *Frame.stereo

Fixes #23
---
 fuzzing_test.go         | 7 +++++++
 internal/frame/frame.go | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/fuzzing_test.go b/fuzzing_test.go
index 410c3d0..b6cf7fc 100644
--- a/fuzzing_test.go
+++ b/fuzzing_test.go
@@ -83,6 +83,13 @@ func TestFuzzing(t *testing.T) {
 			"00000000000000000000" +
 			"00000000000000000000" +
 			"00000000000000000000",
+		// #23
+		"\xff\xfb%S000000v000\x00\x010000" +
+			"00000000000000000000" +
+			"0000\xf4000000000000000" +
+			"00000000000000000000" +
+			"00000000000000000000" +
+			"00000000000000000000",
 	}
 	for _, input := range inputs {
 		b := &bytesReadCloser{bytes.NewReader([]byte(input))}
diff --git a/internal/frame/frame.go b/internal/frame/frame.go
index acbfcfc..cbd3337 100644
--- a/internal/frame/frame.go
+++ b/internal/frame/frame.go
@@ -327,7 +327,7 @@ func (f *Frame) stereoProcessIntensityShort(gr int, sfb int) {
 	for win := 0; win < 3; win++ {
 		// Check that((is_pos[sfb]=scalefac) != 7) => no intensity stereo
 		is_pos := f.mainData.ScalefacS[gr][0][sfb][win]
-		if is_pos != 7 {
+		if is_pos < 7 {
 			sfb_start := consts.SfBandIndicesSet[sfreq].S[sfb]*3 + win_len*win
 			sfb_stop := sfb_start + win_len
 			if is_pos == 6 { // tan((6*PI)/12 = PI/2) needs special treatment!