[tbb-commits] [tor-browser] 32/43: Bug 1768559: Do something safe in this weird corner case. r=mjf, a=RyanVM

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pierov pushed a commit to branch tor-browser-91.10.0esr-11.0-1
in repository tor-browser.

commit c74dc4ab1355641bc7c62e173967cc3d6f702dff
Author: Byron Campen <docfaraday at gmail.com>
AuthorDate: Tue May 17 00:01:26 2022 +0000

    Bug 1768559: Do something safe in this weird corner case. r=mjf, a=RyanVM
    
    Differential Revision: https://phabricator.services.mozilla.com/D145979
---
 dom/media/webrtc/jsep/JsepSessionImpl.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dom/media/webrtc/jsep/JsepSessionImpl.cpp b/dom/media/webrtc/jsep/JsepSessionImpl.cpp
index 426cc2e988e16..badf80cc3d3ff 100644
--- a/dom/media/webrtc/jsep/JsepSessionImpl.cpp
+++ b/dom/media/webrtc/jsep/JsepSessionImpl.cpp
@@ -2461,6 +2461,13 @@ bool JsepSessionImpl::CheckNegotiationNeeded() const {
     }
 
     size_t level = transceiver->GetLevel();
+    if (NS_WARN_IF(mCurrentLocalDescription->GetMediaSectionCount() <= level) ||
+        NS_WARN_IF(mCurrentRemoteDescription->GetMediaSectionCount() <=
+                   level)) {
+      MOZ_ASSERT(false);
+      continue;
+    }
+
     const SdpMediaSection& local =
         mCurrentLocalDescription->GetMediaSection(level);
     const SdpMediaSection& remote =

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