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avformat/iamf_parse: keep count_label consistent on language_label allocation failure 

Fixes: null pointer dereference
Fixes: 67023/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-6011025237278720

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
James Almer 2024-03-21 00:37:16 +01:00 committed by Michael Niedermayer
parent f26ee6e066
commit 0a693bce62
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libavformat/iamf_parse.c
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@ -822,6 +822,7 @@ static int mix_presentation_obu(void *s, IAMFContext *c, AVIOContext *pb, int le
mix_presentation->language_label = av_calloc(mix_presentation->count_label,
sizeof(*mix_presentation->language_label));
if (!mix_presentation->language_label) {
mix_presentation->count_label = 0;
ret = AVERROR(ENOMEM);
goto fail;
}