On 3/17/2022 8:30 PM, Michael Niedermayer wrote:
Fixes: out of array write
Fixes:
45624/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-6473487382872064
Fixes:
45626/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-4874997192065024
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavcodec/alsdec.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 822cf211b0..73af829178 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1986,7 +1986,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
unsigned int c;
unsigned int channel_size;
int num_buffers, ret;
- int channels = avctx->ch_layout.nb_channels;
+ int channels;
ALSDecContext *ctx = avctx->priv_data;
ALSSpecificConfig *sconf = &ctx->sconf;
ctx->avctx = avctx;
@@ -2000,6 +2000,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Reading ALSSpecificConfig failed.\n");
return ret;
}
+ channels = avctx->ch_layout.nb_channels;
if ((ret = check_specific_config(ctx)) < 0) {
return ret;
LGTM
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