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avcodec/alsdec: No channels cannot be accessed 

Fixes: out of array access
Fixes: 48145/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5054524173189120

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Thilo Borgmann <thilo.borgmann@mail.de>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-07-02 14:22:48 +02:00
parent cd847f86d3
commit 9fec43a92d
1 changed files with 3 additions and 0 deletions
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3
libavcodec/alsdec.c
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@ -361,6 +361,9 @@ static av_cold int read_specific_config(ALSDecContext *ctx)
return AVERROR_PATCHWELCOME;
}
if (avctx->ch_layout.nb_channels == 0)
return AVERROR_INVALIDDATA;
ctx->cur_frame_length = sconf->frame_length;
// read channel config