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avcodec/h2645_sei: Initialize side data before deallocation

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Fixes: use after free
Fixes: poc_hvcc_modified.mp4

Found by: Jiale Yao
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2026-05-17 16:55:54 +02:00 • committed by michaelni
parent af739541bf
commit f435ce22e1
1 changed files with 4 additions and 4 deletions
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8
libavcodec/h2645_sei.c
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@ -629,15 +629,15 @@ static int h2645_sei_to_side_data(AVCodecContext *avctx, H2645SEI *sei,
return AVERROR(ENOMEM);
}
dst_env->ambient_illuminance = av_make_q(env->ambient_illuminance, 10000);
dst_env->ambient_light_x = av_make_q(env->ambient_light_x, 50000);
dst_env->ambient_light_y = av_make_q(env->ambient_light_y, 50000);
ret = ff_frame_new_side_data_from_buf_ext(avctx, sd, nb_sd,
AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT, &buf);
if (ret < 0)
return ret;
dst_env->ambient_illuminance = av_make_q(env->ambient_illuminance, 10000);
dst_env->ambient_light_x = av_make_q(env->ambient_light_x, 50000);
dst_env->ambient_light_y = av_make_q(env->ambient_light_y, 50000);
}
if (sei->mastering_display.present) {