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Issue metadata

Status: Verified
Owner: ----
Closed: Jun 2018
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 1
Type: Bug



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Null-dereference READ in blink::V8Window::getComputedAccessibleNodeMethodCallback

Project Member Reported by ClusterFuzz, Jun 7 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5385524223934464

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=564194:564214

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5385524223934464

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 7 2018

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.
Failed to reproduce on linux.
On mac, I can reproduce the segfault when I download the fresh build that clusterfuzz used, extract it and run. But only once :/
All subsequent runs succeed. I need to remove the extracted directory and extract again to make it fail again.
This is the first time I have this. It probably means that the bug is timing-dependent, and the timing is just a bit different on the first run. I verified that no files in the extracted folder are modified beside the content_shell.log and Info.plist.
Any help how to triage this further is appreciated.
Project Member

Comment 3 by ClusterFuzz, Jun 14 2018

ClusterFuzz has detected this issue as fixed in range 566744:566753.

Detailed report: https://clusterfuzz.com/testcase?key=5385524223934464

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=564194:564214
Fixed: https://clusterfuzz.com/revisions?job=mac_asan_content_shell&range=566744:566753

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5385524223934464

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 4 by ClusterFuzz, Jun 14 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Untriaged)
ClusterFuzz testcase 5385524223934464 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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