From c8d0bb8966fadd0a725bbf7ab78a290e3ae9a216 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 19 Aug 2025 03:12:37 +0200 Subject: [PATCH] avcodec/dxv: Check coded_height, to avoid invalid av_clip() Fixes: assertion failure Fixes: 438961582/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXV_DEC_fuzzer-5850827739955200 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit cdee519d40e61bd65ba5b3fbec00acd50a08d0d9) Signed-off-by: Michael Niedermayer --- libavcodec/dxv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c index 0b53d0b909..838ec7d21f 100644 --- a/libavcodec/dxv.c +++ b/libavcodec/dxv.c @@ -1147,6 +1147,8 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame, ctx->tex_rat = 1; break; } + if (avctx->coded_height / 2 / TEXTURE_BLOCK_H < 1) + return AVERROR_INVALIDDATA; ctx->slice_count = av_clip(avctx->thread_count, 1, avctx->coded_height / FFMAX(ctx->texture_block_h,