Verified Commit 131509a0 authored by Randell Jesup's avatar Randell Jesup Committed by ma1
Browse files

Bug 2036932: Fix nsSocketTransport2 DNS result field data races r=necko-reviewers,valentin 

Differential Revision: https://phabricator.services.mozilla.com/D298425
parent 950483d7

netwerk/base/nsSocketTransport2.cpp

+38 −12
Original line number Diff line number Diff line
@@ -722,9 +722,15 @@ nsresult nsSocketTransport::Init(const nsTArray<nsCString>& types, 
  if (dnsRecord) {

    mExternalDNSResolution = true;

    mDNSRecord = do_QueryInterface(dnsRecord);

    mDNSRecord->IsTRR(&mResolvedByTRR);

    mDNSRecord->GetEffectiveTRRMode(&mEffectiveTRRMode);

    mDNSRecord->GetTrrSkipReason(&mTRRSkipReason);

    bool resolvedByTRR;

    mDNSRecord->IsTRR(&resolvedByTRR);

    mResolvedByTRR = resolvedByTRR;

    nsIRequest::TRRMode effectiveTRRMode;

    mDNSRecord->GetEffectiveTRRMode(&effectiveTRRMode);

    mEffectiveTRRMode = effectiveTRRMode;

    nsITRRSkipReason::value trrSkipReason;

    mDNSRecord->GetTrrSkipReason(&trrSkipReason);

    mTRRSkipReason = trrSkipReason;

  }



  // init socket type info
@@ -1751,9 +1757,17 @@ bool nsSocketTransport::RecoverFromError() { 
  // try next ip address only if past the resolver stage...

  if (mState == STATE_CONNECTING && mDNSRecord) {

    nsresult rv = mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);

    mDNSRecord->IsTRR(&mResolvedByTRR);

    mDNSRecord->GetEffectiveTRRMode(&mEffectiveTRRMode);

    mDNSRecord->GetTrrSkipReason(&mTRRSkipReason);

    {

      bool resolvedByTRR;

      mDNSRecord->IsTRR(&resolvedByTRR);

      mResolvedByTRR = resolvedByTRR;

      nsIRequest::TRRMode effectiveTRRMode;

      mDNSRecord->GetEffectiveTRRMode(&effectiveTRRMode);

      mEffectiveTRRMode = effectiveTRRMode;

      nsITRRSkipReason::value trrSkipReason;

      mDNSRecord->GetTrrSkipReason(&trrSkipReason);

      mTRRSkipReason = trrSkipReason;

    }

    if (NS_SUCCEEDED(rv)) {

      SOCKET_LOG(("  trying again with next ip address\n"));

      tryAgain = true;
@@ -2061,9 +2075,15 @@ void nsSocketTransport::OnSocketEvent(uint32_t type, nsresult status, 


      if (mDNSRecord) {

        mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);

        mDNSRecord->IsTRR(&mResolvedByTRR);

        mDNSRecord->GetEffectiveTRRMode(&mEffectiveTRRMode);

        mDNSRecord->GetTrrSkipReason(&mTRRSkipReason);

        bool resolvedByTRR;

        mDNSRecord->IsTRR(&resolvedByTRR);

        mResolvedByTRR = resolvedByTRR;

        nsIRequest::TRRMode effectiveTRRMode;

        mDNSRecord->GetEffectiveTRRMode(&effectiveTRRMode);

        mEffectiveTRRMode = effectiveTRRMode;

        nsITRRSkipReason::value trrSkipReason;

        mDNSRecord->GetTrrSkipReason(&trrSkipReason);

        mTRRSkipReason = trrSkipReason;

      }

      // status contains DNS lookup status

      if (NS_FAILED(status)) {
@@ -2823,9 +2843,15 @@ nsSocketTransport::OnLookupComplete(nsICancelable* request, nsIDNSRecord* rec, 
  }



  if (nsCOMPtr<nsIDNSAddrRecord> addrRecord = do_QueryInterface(rec)) {

    addrRecord->IsTRR(&mResolvedByTRR);

    addrRecord->GetEffectiveTRRMode(&mEffectiveTRRMode);

    addrRecord->GetTrrSkipReason(&mTRRSkipReason);

    bool resolvedByTRR;

    addrRecord->IsTRR(&resolvedByTRR);

    mResolvedByTRR = resolvedByTRR;

    nsIRequest::TRRMode effectiveTRRMode;

    addrRecord->GetEffectiveTRRMode(&effectiveTRRMode);

    mEffectiveTRRMode = effectiveTRRMode;

    nsITRRSkipReason::value trrSkipReason;

    addrRecord->GetTrrSkipReason(&trrSkipReason);

    mTRRSkipReason = trrSkipReason;

  }



  // flag host lookup complete for the benefit of the ResolveHost method.

netwerk/base/nsSocketTransport2.h

+5 −3
Original line number Diff line number Diff line
@@ -273,9 +273,11 @@ class nsSocketTransport final : public nsASocketHandler, 


  nsCString mEchConfig MOZ_GUARDED_BY(mLock);

  Atomic<bool, Relaxed> mEchConfigUsed{false};

  bool mResolvedByTRR{false};

  nsIRequest::TRRMode mEffectiveTRRMode{nsIRequest::TRR_DEFAULT_MODE};

  nsITRRSkipReason::value mTRRSkipReason{nsITRRSkipReason::TRR_UNSET};

  Atomic<bool, Relaxed> mResolvedByTRR{false};

  Atomic<nsIRequest::TRRMode, Relaxed> mEffectiveTRRMode{

      nsIRequest::TRR_DEFAULT_MODE};

  Atomic<nsITRRSkipReason::value, Relaxed> mTRRSkipReason{

      nsITRRSkipReason::TRR_UNSET};



  nsCOMPtr<nsISupports> mInputCopyContext;

  nsCOMPtr<nsISupports> mOutputCopyContext;