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Issue 832099 link

Starred by 1 user

Issue metadata

Status: WontFix
Owner:
Closed: Aug 2
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Regression



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Null-dereference READ in content::DelegatedFrameHostClientAura::DelegatedFrameHostGetLayer

Project Member Reported by ClusterFuzz, Apr 12 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4697460400979968

Fuzzer: attekett_dom_fuzzer
Job Type: linux_asan_chrome_v8_arm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x0000000c
Crash State:
  content::DelegatedFrameHostClientAura::DelegatedFrameHostGetLayer
  content::DelegatedFrameHost::EvictDelegatedFrame
  content::DelegatedFrameHost::OnLostResources
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_v8_arm&range=550062:550064

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4697460400979968

Additional requirements: Requires Gestures

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 12 2018

Components: Internals>Core
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.
Cc: brajkumar@chromium.org
Labels: -Type-Bug M-67 Test-Predator-Wrong Type-Bug-Regression
Owner: ccameron@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL could not provide any possible suspects.

Using Code Search for the file, "delegated_frame_host_client_aura.cc" suspecting the below Cl might have caused this issue

Suspect CL: https://chromium.googlesource.com/chromium/src/+/b851ceb60174d8b903d4ff26e01f75f5eb6b7db9

ccameron@ -- Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Thanks!
Owner: sky@chromium.org
That patch is very far from where this crash is occurring.

It appears that RWHVAura::window_ is nullptr here:

ui::Layer* DelegatedFrameHostClientAura::DelegatedFrameHostGetLayer() const {
  return render_widget_host_view_->window_->layer();
}

->sky based on blamelist (though there may be a better OWNER for this code now).
Project Member

Comment 4 by ClusterFuzz, Aug 2

Status: WontFix (was: Assigned)
ClusterFuzz testcase 4697460400979968 is flaky and no longer crashes, so closing issue.

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

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