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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-30 12:22:25 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-28 11:20:48 +0100 |
| commit | f1b97f62f86d5dca35d01d7a5ebbc5dca2a88ae6 (patch) | |
| tree | b293bfdb92487623284cae2f71f13abdceb0c209 | |
| parent | fc3760a66dc7622e1b507e322e63411bd8c13369 (diff) | |
avcodec/iff: Check that video_size is large enough for the read parameters
video is allocated before parameters like bpp are read.
Fixes: out of array access
Fixes: 19084/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5718556033679360
Fixes: 19465/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5759908398235648
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/iff.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/iff.c b/libavcodec/iff.c index 267b09b6af..f82141d2e7 100644 --- a/libavcodec/iff.c +++ b/libavcodec/iff.c @@ -322,6 +322,8 @@ static int extract_header(AVCodecContext *const avctx, av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp); return AVERROR_INVALIDDATA; } + if (s->video_size && s->planesize * s->bpp * avctx->height > s->video_size) + return AVERROR_INVALIDDATA; av_freep(&s->ham_buf); av_freep(&s->ham_palbuf); |