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

Message ID 20221121235823.28468-2-michael@niedermayer.cc
State New
Headers show
Series [FFmpeg-devel,1/3] avutil/tx: Use unsigned in ff_tx_fft_sr_combine() to avoid undefined behavior | expand


Context Check Description
andriy/make_x86 success Make finished
andriy/make_fate_x86 success Make fate finished

Commit Message

Michael Niedermayer Nov. 21, 2022, 11:58 p.m. UTC
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@niedermayer.cc>
 libavcodec/mlpdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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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) {
                               "%d channels (more than the "
                               "maximum supported by the decoder)",