From 54204fe0b09bb0f63b2156d86585b9d92748bd95 Mon Sep 17 00:00:00 2001
From: smayya <smayya@mozilla.com>
Date: Mon, 16 Sep 2024 02:52:47 +0000
Subject: [PATCH] Bug 1887783 - ensure we are not retargeting during
 OnDataAvailable. r=necko-reviewers,valentin

Differential Revision: https://phabricator.services.mozilla.com/D221965
---
 netwerk/protocol/http/HttpChannelChild.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/netwerk/protocol/http/HttpChannelChild.cpp b/netwerk/protocol/http/HttpChannelChild.cpp
index fd57b3beed51..3a4feccc5ae3 100644
--- a/netwerk/protocol/http/HttpChannelChild.cpp
+++ b/netwerk/protocol/http/HttpChannelChild.cpp
@@ -3042,9 +3042,12 @@ HttpChannelChild::RetargetDeliveryTo(nsISerialEventTarget* aNewTarget) {
     return rv;
   }
 
+  // We allow multiple retargeting. However all such modification must happen
+  // before we have have received the first OnDataAvailable.
+  // See Bug 1887783
+  MOZ_ASSERT(mOnDataAvailableStartTime.IsNull());
   {
     MutexAutoLock lock(mEventTargetMutex);
-    MOZ_ASSERT(!mODATarget);
     RetargetDeliveryToImpl(aNewTarget, lock);
   }