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avcodec/indeo5: Do not leave frame_type set to an invalid value 

Fixes: null pointer dereference
Fixes: 5264/clusterfuzz-testcase-minimized-4621956621008896

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-26 00:24:49 +01:00
parent 4a75a75c62
commit 2ff9f17851
1 changed files with 1 additions and 0 deletions
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libavcodec/indeo5.c
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@ -324,6 +324,7 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
ctx->frame_type = get_bits(&ctx->gb, 3);
if (ctx->frame_type >= 5) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
ctx->frame_type = FRAMETYPE_INTRA;
return AVERROR_INVALIDDATA;
}