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xan: Prevent NULL dereference with missing palette

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Signed-off-by: Janne Grunau <janne-libav@jannau.net>
(cherry picked from commit 7d17a794f0)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Laurent Aimar 2011-09-29 03:12:07 +00:00 committed by Reinhard Tartler
parent 49007b494e
commit be2404b06d
1 changed files with 5 additions and 0 deletions
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5
libavcodec/xan.c
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@ -553,6 +553,11 @@ static int xan_decode_frame(AVCodecContext *avctx,
}
buf_size = buf_end - buf;
}
if (s->palettes_count <= 0) {
av_log(s->avctx, AV_LOG_ERROR, "No palette found\n");
return AVERROR_INVALIDDATA;
}
if ((ret = avctx->get_buffer(avctx, &s->current_frame))) {
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;