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Fix potential overreads in rv34 decoder.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 9a0a64cb26)
This commit is contained in:
Laurent Aimar
2011-09-17 16:56:30 +02:00
committed by Michael Niedermayer
parent 6e21f03547
commit 30d7dce94f
1 changed files with 3 additions and 2 deletions
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5
libavcodec/rv34.c
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@@ -1443,6 +1443,7 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
slice_count = (*buf++) + 1;
slices_hdr = buf + 4;
buf += 8 * slice_count;
buf_size -= 1 + 8 * slice_count;
}else
slice_count = avctx->slice_count;
@@ -1461,7 +1462,7 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
|| (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
|| avctx->skip_frame >= AVDISCARD_ALL)
return buf_size;
return avpkt->size;
for(i=0; i<slice_count; i++){
int offset= get_slice_offset(avctx, slices_hdr, i);
@@ -1510,7 +1511,7 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
}
s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
}
return buf_size;
return avpkt->size;
}
av_cold int ff_rv34_decode_end(AVCodecContext *avctx)