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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-11 00:54:17 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-24 23:58:15 +0300 |
| commit | 4e07d4a1eec9e9bda901ba0ade8e08603a1e5046 (patch) | |
| tree | 459a892e4751a6bbaddc26b5be77dff9ac350dc8 | |
| parent | 8f483d42e04d11d6e1d3d159ca975bb29fb6c719 (diff) | |
avcodec/exr: Check preview psize
Fixes: signed integer overflow: 17121181824 * 538976288 cannot be represented in type 'long long'
Fixes: 48798/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5915330316206080
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 ac26712e35f5ebc726d1be14bb4a420949e66604)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/exr.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c index c25bae8cd4..91a567cd41 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1951,9 +1951,12 @@ static int decode_header(EXRContext *s, AVFrame *frame) "preview", 16)) >= 0) { uint32_t pw = bytestream2_get_le32(gb); uint32_t ph = bytestream2_get_le32(gb); - int64_t psize = 4LL * pw * ph; + uint64_t psize = pw * ph; + if (psize > INT64_MAX / 4) + return AVERROR_INVALIDDATA; + psize *= 4; - if (psize >= bytestream2_get_bytes_left(gb)) + if ((int64_t)psize >= bytestream2_get_bytes_left(gb)) return AVERROR_INVALIDDATA; bytestream2_skip(gb, psize); |