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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-09-19 23:57:31 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-09-24 15:37:17 +0200 |
| commit | c3a1cbbf5d99337b5e99260eb95c84e65c7587f6 (patch) | |
| tree | f6a84afebaaf1b3a23443786a3e45db5ba1a5cb2 | |
| parent | 9a823fbcfae33c8022086cbdea94e8e6d7b32ec1 (diff) | |
| download | ffmpeg-c3a1cbbf5d99337b5e99260eb95c84e65c7587f6.tar.gz | |
avcodec/eacmv: Check input size for intra frames
Fixes: Timeout
Fixes: 71135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EACMV_fuzzer-6251879028293632
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/eacmv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/eacmv.c b/libavcodec/eacmv.c index 43dba20fae..15d3550cb8 100644 --- a/libavcodec/eacmv.c +++ b/libavcodec/eacmv.c @@ -194,12 +194,15 @@ static int cmv_decode_frame(AVCodecContext *avctx, AVFrame *frame, if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0) return ret; + buf += EA_PREAMBLE_SIZE; + if (!(buf[0]&1) && buf_end - buf < s->width * s->height * (int64_t)(100 - s->avctx->discard_damaged_percentage) / 100) + return AVERROR_INVALIDDATA; + if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) return ret; memcpy(frame->data[1], s->palette, AVPALETTE_SIZE); - buf += EA_PREAMBLE_SIZE; if ((buf[0]&1)) { // subtype cmv_decode_inter(s, frame, buf+2, buf_end); frame->flags &= ~AV_FRAME_FLAG_KEY; |