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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-02-18 22:33:02 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-04-21 01:55:13 +0200 |
| commit | 747cefb8e65e40a9d24a43342e305b1a9c099924 (patch) | |
| tree | 9a008306b794e3263cfbd18883313d194c17b99b | |
| parent | 26a98f0dba6cd7ee95a1ae9342acb67a4719cd92 (diff) | |
| download | ffmpeg-747cefb8e65e40a9d24a43342e305b1a9c099924.tar.gz | |
avcodec/ffv1dec: Check that num h/v slices is supported
Fixes: out of array access
Fixes: 55597/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_fuzzer-4898293416329216
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 8ead0ae68eb64ad325efafd686c434727f3d666a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/ffv1dec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c index 0c6b545211..69aa898521 100644 --- a/libavcodec/ffv1dec.c +++ b/libavcodec/ffv1dec.c @@ -478,6 +478,11 @@ static int read_extra_header(FFV1Context *f) return AVERROR_INVALIDDATA; } + if (f->num_h_slices > MAX_SLICES / f->num_v_slices) { + av_log(f->avctx, AV_LOG_ERROR, "slice count unsupported\n"); + return AVERROR_PATCHWELCOME; + } + f->quant_table_count = get_symbol(c, state, 0); if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) { av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count); |