From: Dirk Farin <dirk.farin@gmail.com>
Date: Tue, 5 Apr 2022 16:41:28 +0000 (+0200)
Subject: [PATCH] fix streams where SPS image size changes without refreshing PPS (#299)
X-Git-Tag: archive/raspbian/1.0.3-1+rpi1+deb10u3^2~11
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=55fb165e139d57438eea8f1657cd9c5237156663;p=libde265.git

[PATCH] fix streams where SPS image size changes without refreshing PPS (#299)


Gbp-Pq: Name CVE-2021-36408.patch
---

diff --git a/libde265/decctx.cc b/libde265/decctx.cc
index edebb71..6701725 100644
--- a/libde265/decctx.cc
+++ b/libde265/decctx.cc
@@ -562,6 +562,15 @@ de265_error decoder_context::read_sps_NAL(bitreader& reader)
 
   sps[ new_sps->seq_parameter_set_id ] = new_sps;
 
+  // Remove the all PPS that referenced the old SPS because parameters may have changed and we do not want to
+  // get the SPS and PPS parameters (e.g. image size) out of sync.
+  
+  for (auto& p : pps) {
+    if (p && p->seq_parameter_set_id == new_sps->seq_parameter_set_id) {
+      p = nullptr;
+    }
+  }
+
   return DE265_OK;
 }