[Webkit-unassigned] [Bug 148082] New: REGRESSION (r188486): use-after-free in SubresourceLoader::didReceiveResponse() when TemporaryChange goes out of scope

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=148082

            Bug ID: 148082
           Summary: REGRESSION (r188486): use-after-free in
                    SubresourceLoader::didReceiveResponse() when
                    TemporaryChange goes out of scope
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aestes at apple.com

Created attachment 259163
  --> https://bugs.webkit.org/attachment.cgi?id=259163&action=review
ASan crash log for http/tests/appcache/deferred-events-delete-while-raising.html

See attached crash log.

The issue is that the TemporaryChange added in r188486 is declared before |protect|, which means its destructor will be called after the last ref to the SubresourceLoader is possibly removed.

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