mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/vp3: check current_frame before accessing it
Fixes null pointer dereference Fixes: b15eb06e0111e94bc59123c86db7aff9_signal_sigsegv_a0500f_45_320vp3.nsv with allocation limit 536870912 Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1947,6 +1947,8 @@ static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *
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}
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if (s != s1) {
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if (!s->current_frame.f)
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return AVERROR(ENOMEM);
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// init tables if the first frame hasn't been decoded
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if (!s->current_frame.f->data[0]) {
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int y_fragment_count, c_fragment_count;
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