avcodec/iff: Clear ham_buf

Fixes: use of uninitialized memory Fixes: 423673969/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-6651797156724736

Michael Niedermayer committed 1 year ago

Commit 7e9e7cb1 parent 715df4b1 file · +1 −1Browse files

Unified · Split

@@ -279,7 +279,7 @@ static int extract_header(AVCodecContext *const avctx, · 278 unmodified lines
279	if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ') && s->ham == 4)	279	if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ') && s->ham == 4)
280	extra_space = 4;	280	extra_space = 4;
281		281
282	s->ham_buf = av_malloc((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE);	282	s->ham_buf = av_mallocz((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE);
283	if (!s->ham_buf)	283	if (!s->ham_buf)
284	return AVERROR(ENOMEM);	284	return AVERROR(ENOMEM);
285		285

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