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Issue metadata

Status: Verified
Owner:
Closed: Aug 24
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Mac
Pri: 1
Type: Bug
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Null-dereference READ in blink::V8Window::getComputedAccessibleNodeMethodCallback

Project Member Reported by ClusterFuzz, Jul 11

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5717344513687552

Fuzzer: inferno_twister
Job Type: mac_asan_content_shell
Platform Id: mac

Crash Type: Null-dereference READ
Crash Address: 0x000000000050
Crash State:
  blink::V8Window::getComputedAccessibleNodeMethodCallback
  v8::internal::FunctionCallbackArguments::Call
  v8::internal::MaybeHandle<v8::internal::Object> v8::internal::HandleApiCallHelpe
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_content_shell&range=537693:537712

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5717344513687552

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by ClusterFuzz, Jul 11

Components: Blink>JavaScript
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Components: -Blink>JavaScript Blink
Owner: aboxhall@chromium.org
Status: Assigned (was: Untriaged)
third_party/blink/renderer/core/page/page.h:
197   Settings& GetSettings() const { return *settings_; }                           

This fails since settings_ is a nullptr.

Called from here:
third_party/blink/renderer/core/frame/local_dom_window.cc:
1111   element->GetDocument().GetPage()->GetSettings().SetAccessibilityEnabled(true); 

The CL which added this line (06bafdfb50ee7ede3709742290c256e60ad50bdb) is contained in the regression range. Assigning to the author.
Components: -Blink Blink>Accessibility
Project Member

Comment 4 by ClusterFuzz, Jul 30

Labels: OS-Linux
Project Member

Comment 5 by ClusterFuzz, Aug 24

ClusterFuzz has detected this issue as fixed in range 585574:585607.

Detailed report: https://clusterfuzz.com/testcase?key=5717344513687552

Fuzzer: inferno_twister
Job Type: mac_asan_content_shell
Platform Id: mac

Crash Type: Null-dereference READ
Crash Address: 0x000000000050
Crash State:
  blink::V8Window::getComputedAccessibleNodeMethodCallback
  v8::internal::FunctionCallbackArguments::Call
  v8::internal::MaybeHandle<v8::internal::Object> v8::internal::HandleApiCallHelpe
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_content_shell&range=537693:537712
Fixed: https://clusterfuzz.com/revisions?job=mac_asan_content_shell&range=585574:585607

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5717344513687552

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Project Member

Comment 6 by ClusterFuzz, Aug 24

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5717344513687552 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

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