[FFmpeg-devel] [PATCH 2/3] avcodec/mlpdec: Check max matrix instead of max channel in noise check

[Michael Niedermayer]

This is a regression since: adaa06581c5444c94eef72d61b8166f096e2687a
Before this, max_channel and  max_matrix_channel where compared for equality

Fixes: out of array access
Fixes: 53340/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEHD_fuzzer-514959011885875

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/mlpdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index 0b0eb75990..5b14a3b03b 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -539,7 +539,7 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
 
     /* This should happen for TrueHD streams with >6 channels and MLP's noise
      * type. It is not yet known if this is allowed. */
-    if (max_channel > MAX_MATRIX_CHANNEL_MLP && !noise_type) {
+    if (max_matrix_channel > MAX_MATRIX_CHANNEL_MLP && !noise_type) {
         avpriv_request_sample(m->avctx,
                               "%d channels (more than the "
                               "maximum supported by the decoder)",
-- 
2.17.1