[FFmpeg-devel] [PR] avcodec/hevc/ps: add missing check for profile tier level count (PR #21490)

[James Almer via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #21490 opened by James Almer (jamrial)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21490
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21490.patch

Fixes issue #21488.


>From 1b66babd321c2a0759b90be2e1f4d3d25c19103e Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Fri, 16 Jan 2026 11:32:45 -0300
Subject: [PATCH] avcodec/hevc/ps: add missing check for profile tier level
 count

Fixes issue #21488.

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavcodec/hevc/ps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/hevc/ps.c b/libavcodec/hevc/ps.c
index 7b9dbbcff8..9f7a61e794 100644
--- a/libavcodec/hevc/ps.c
+++ b/libavcodec/hevc/ps.c
@@ -666,6 +666,7 @@ static int decode_vps_ext(GetBitContext *gb, AVCodecContext *avctx, HEVCVPS *vps
     if (vps->vps_num_layer_sets == 1 || default_output_layer_idc == 2)
         skip_bits1(gb);
 
+    if (nb_ptl > 1)
     for (int j = 0; j < av_popcount64(vps->ols[1]); j++) {
         int ptl_idx = get_bits(gb, av_ceil_log2(nb_ptl));
         if (ptl_idx >= nb_ptl) {
-- 
2.52.0

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