[webkit-changes] [WebKit/WebKit] 4b9389: Don't dereference null when DNSServiceGetAddrInfo ...

[Alex Christensen]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 4b93898a545affdf81989b1df86324c6aff889ac
      https://github.com/WebKit/WebKit/commit/4b93898a545affdf81989b1df86324c6aff889ac
  Author: Alex Christensen <achristensen at apple.com>
  Date:   2023-06-12 (Mon, 12 Jun 2023)

  Changed paths:
    M Source/WebCore/platform/network/cf/DNSResolveQueueCFNet.cpp

  Log Message:
  -----------
  Don't dereference null when DNSServiceGetAddrInfo fails immediately
https://bugs.webkit.org/show_bug.cgi?id=257977
rdar://110383873

Reviewed by David Kilzer.

Ref::leakRef sets the pointer to null, then we were using that value.
With some code modification I verified that this is what was happening in the crash reports.

* Source/WebCore/platform/network/cf/DNSResolveQueueCFNet.cpp:
(WebCore::DNSResolveQueueCFNet::performDNSLookup):

Canonical link: https://commits.webkit.org/265086@main