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avcodec/imm4: Check input size

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Fixes: Timeout
Fixes: 71324/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IMM4_fuzzer-5388489435185152

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8367d7e184)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-09-22 22:47:03 +02:00
parent 0f0645381b
commit 6f395fba57
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1 changed files with 4 additions and 0 deletions
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4
libavcodec/imm4.c
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@ -452,6 +452,10 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
if (ret < 0)
return ret;
if (((avctx->width + 15) / 16) * ((avctx->height + 15) / 16) > get_bits_left(gb))
return AVERROR_INVALIDDATA;
if ((ret = ff_get_buffer(avctx, frame, (frame->flags & AV_FRAME_FLAG_KEY) ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
return ret;