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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-10 23:02:36 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-13 14:42:57 +0200 |
| commit | 18c808ffbed81ea580fe6ddd6524dd7bea3f8d0e (patch) | |
| tree | f46fd38da7c21568d7a899d1817debda49d2dbf6 | |
| parent | 9ffa32b81bede1dbb167dfceb48fe605b27a0890 (diff) | |
| download | ffmpeg-18c808ffbed81ea580fe6ddd6524dd7bea3f8d0e.tar.gz | |
avcodec/pngdec: Check that previous_picture has same w/h/format
Fixes: out of array access
Fixes: 15540/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-5684905029140480
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pngdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 5209e342db..bf5a5191cc 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -1391,6 +1391,9 @@ exit_loop: if (CONFIG_PNG_DECODER && avctx->codec_id != AV_CODEC_ID_APNG) handle_p_frame_png(s, p); else if (CONFIG_APNG_DECODER && + s->previous_picture.f->width == p->width && + s->previous_picture.f->height== p->height && + s->previous_picture.f->format== p->format && avctx->codec_id == AV_CODEC_ID_APNG && (ret = handle_p_frame_apng(avctx, s, p)) < 0) goto fail; |