Commit c9b1c355e0 for ffmpeg

commit c9b1c355e008fe8449228ae86f17178b3c32b30c
Author: Hongduo Zhao <hdzhao214@gmail.com>
Date:   Tue Sep 29 01:57:32 2026 +0200

    avcodec/librav1e: pass the remaining stats size to rav1e_twopass_in()

    Fixes: heap out of array read in rav1e with a truncated pass-2 log
    Fixes: c2jCdj0i7WcP
    Found-by: Hongduo Zhao
    Replicated through UnModified FFmpeg

diff --git a/libavcodec/librav1e.c b/libavcodec/librav1e.c
index 0db80830d8..785e9e91ea 100644
--- a/libavcodec/librav1e.c
+++ b/libavcodec/librav1e.c
@@ -161,7 +161,8 @@ static int set_stats(AVCodecContext *avctx)
     int ret = 1;

     while (ret > 0 && ctx->pass_size - ctx->pass_pos > 0) {
-        ret = rav1e_twopass_in(ctx->ctx, ctx->pass_data + ctx->pass_pos, ctx->pass_size);
+        ret = rav1e_twopass_in(ctx->ctx, ctx->pass_data + ctx->pass_pos,
+                               ctx->pass_size - ctx->pass_pos);
         if (ret < 0)
             return AVERROR_EXTERNAL;
         ctx->pass_pos += ret;