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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-01-08 20:03:40 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-02-22 00:10:15 +0100 |
| commit | 7e211d001f920ea98a6a22c561bb184e1416b380 (patch) | |
| tree | 62a9dcd0826963248509c1a59cfc81ad1af0f0c0 | |
| parent | 87e6221d5327c74dfca652f7e64fed138163c3f4 (diff) | |
| download | ffmpeg-7e211d001f920ea98a6a22c561bb184e1416b380.tar.gz | |
avcodec/scpr: Test bx before use
Fixes: out of array access on 32bit
Fixes: 54850/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-5302669294305280
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 1b59de3770b2e3f7f44ec4adba27c88b79adaaec)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/scpr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/scpr.c b/libavcodec/scpr.c index 0623b73c84..f868c474c9 100644 --- a/libavcodec/scpr.c +++ b/libavcodec/scpr.c @@ -460,6 +460,9 @@ static int decompress_p(AVCodecContext *avctx, int run, bx = x * 16 + sx1, by = y * 16 + sy1; uint32_t r, g, b, clr, ptype = 0; + if (bx >= avctx->width) + return AVERROR_INVALIDDATA; + for (; by < y * 16 + sy2 && by < avctx->height;) { ret = decode_value(s, s->op_model[ptype], 6, 1000, &ptype); if (ret < 0) |