From 554eee05f29e9ba41d1b312b564cc4a510b236e3 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 19 Dec 2020 00:22:04 +0100 Subject: [PATCH] avcodec/ffv1dec: Fix off by 1 error with quant tables Fixes: assertion failure Fixes: 28447/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_fuzzer-5369575948550144 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer (cherry picked from commit 5cae71d2b722d0beed4d46f189db42fbb57d877b) Signed-off-by: Michael Niedermayer --- libavcodec/ffv1dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c index c704373cfe..0a3f425493 100644 --- a/libavcodec/ffv1dec.c +++ b/libavcodec/ffv1dec.c @@ -786,7 +786,7 @@ static int read_header(FFV1Context *f) if (f->version == 2) { int idx = get_symbol(c, state, 0); - if (idx > (unsigned)f->quant_table_count) { + if (idx >= (unsigned)f->quant_table_count) { av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n"); return AVERROR_INVALIDDATA;