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riff: Fix potential memleak.

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Make ff_get_wav_header() free existing extradata before allocing a new
buffer.
This commit is contained in:
Alex Converse
2011-06-09 09:50:38 -07:00
parent dbd3183935
commit ed8a50068c
1 changed files with 1 additions and 0 deletions
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libavformat/riff.c
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@@ -509,6 +509,7 @@ int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
} }
codec->extradata_size = cbSize; codec->extradata_size = cbSize;
if (cbSize > 0) { if (cbSize > 0) {
av_free(codec->extradata);
codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata) if (!codec->extradata)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);