[FFmpeg-devel] [PATCH] libjxldec/libjxlenc: fix leaks (PR #20352)

[Leo Izen via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #20352 opened by Leo Izen (Traneptora)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20352
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20352.patch

Fix leaks. We forgot to free these.


>From a8d6b87a4442c690587db6f44cc7ed72a2de81fc Mon Sep 17 00:00:00 2001
From: Leo Izen <leo.izen@gmail.com>
Date: Wed, 27 Aug 2025 05:26:03 -0400
Subject: [PATCH 1/2] avcodec/libjxldec: fix leaked EXIF ifd

We're missing a call to av_exif_free here. We leak the internal heap-
allocated objects when &ifd goes out of scope.

Signed-off-by: Leo Izen <leo.izen@gmail.com>
---
 libavcodec/libjxldec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/libjxldec.c b/libavcodec/libjxldec.c
index 31f4592d1c..8ce69015bf 100644
--- a/libavcodec/libjxldec.c
+++ b/libavcodec/libjxldec.c
@@ -519,6 +519,7 @@ static int libjxl_receive_frame(AVCodecContext *avctx, AVFrame *frame)
                 ret = ff_decode_exif_attach_ifd(avctx, ctx->frame, &ifd);
                 if (ret < 0)
                     av_log(avctx, AV_LOG_ERROR, "Unable to attach EXIF ifd\n");
+                av_exif_free(&ifd);
             }
             if (ctx->basic_info.have_animation) {
                 ctx->frame->pts = av_rescale_q(ctx->accumulated_pts, ctx->anim_timebase, avctx->pkt_timebase);
-- 
2.49.1


>From 041651841a1e11a6873a1d7b2f826b8678f8a2c8 Mon Sep 17 00:00:00 2001
From: Leo Izen <leo.izen@gmail.com>
Date: Wed, 27 Aug 2025 05:28:31 -0400
Subject: [PATCH 2/2] avcodec/libjxlenc: fix leaked EXIF ifd

We're missing a call to av_exif_free here. We leak the internal heap-
allocated objects when &ifd goes out of scope.

Signed-off-by: Leo Izen <leo.izen@gmail.com>
---
 libavcodec/libjxlenc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/libjxlenc.c b/libavcodec/libjxlenc.c
index 4f05f015e2..81c8233e40 100644
--- a/libavcodec/libjxlenc.c
+++ b/libavcodec/libjxlenc.c
@@ -394,6 +394,7 @@ static int libjxl_preprocess_stream(AVCodecContext *avctx, const AVFrame *frame,
             ret = av_exif_write(avctx, &ifd, &exif_buffer, AV_EXIF_TIFF_HEADER);
         if (ret < 0)
             av_log(avctx, AV_LOG_WARNING, "unable to process EXIF frame data\n");
+        av_exif_free(&ifd);
     } else {
         sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX);
         if (sd)
-- 
2.49.1

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