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Issue metadata

Status: Verified
Owner:
Closed: Dec 11
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 1
Type: Bug



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Null-dereference READ in ash::ScopedTransformOverviewWindow::UpdateMirrorWindowForMinimizedState

Project Member Reported by ClusterFuzz, Nov 30

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6262342704431104

Fuzzer: inferno_twister_c
Job Type: linux_asan_chrome_chromeos
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000040
Crash State:
  ash::ScopedTransformOverviewWindow::UpdateMirrorWindowForMinimizedState
  ash::WindowGrid::OnPostWindowStateTypeChange
  ash::wm::WindowState::NotifyPostStateTypeChange
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=606430:606431

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6262342704431104

Additional requirements: Requires Gestures

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Nov 30

Components: UI>Shell>WindowManager
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.
Project Member

Comment 2 by ClusterFuzz, Nov 30

Labels: Test-Predator-Auto-Owner
Owner: tikuta@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/da06a02d93545183bc626dc6ec6f67ceeb50fb4f (Roll clang 344066:346388.).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Cc: h...@chromium.org
Owner: ----
Status: Available (was: Assigned)
Hans, can you take a look this?
Cc: -h...@chromium.org
The test case is still failing as of Chromium #613020 (see the "Detailed report" link in #0) and the clang roll was reverted in #612687, so it's not related to the roll.

I think someone familiar with ash needs to take a look.
Cc: afakhry@chromium.org x...@chromium.org
Owner: sammiequon@chromium.org
Status: Assigned (was: Available)
This was probably the improper cast of WindowPreviewView to WindowMirrorView. This should be fixed by Daisy's patch at [1].

[1] https://chromium-review.googlesource.com/c/chromium/src/+/1370321
Status: Fixed (was: Assigned)
Project Member

Comment 8 by ClusterFuzz, Dec 18

Labels: Needs-Feedback
ClusterFuzz testcase 6262342704431104 is still reproducing on tip-of-tree build (trunk).

Please re-test your fix against this testcase and if the fix was incorrect or incomplete, please re-open the bug. Otherwise, ignore this notification and add ClusterFuzz-Wrong label.
Project Member

Comment 9 by ClusterFuzz, Dec 20

ClusterFuzz has detected this issue as fixed in range 618201:618205.

Detailed report: https://clusterfuzz.com/testcase?key=6262342704431104

Fuzzer: inferno_twister_c
Job Type: linux_asan_chrome_chromeos
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000040
Crash State:
  ash::ScopedTransformOverviewWindow::UpdateMirrorWindowForMinimizedState
  ash::WindowGrid::OnPostWindowStateTypeChange
  ash::wm::WindowState::NotifyPostStateTypeChange
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=606430:606431
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=618201:618205

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6262342704431104

Additional requirements: Requires Gestures

See https://github.com/google/clusterfuzz-tools for instructions to reproduce this bug locally.

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

Comment 10 by ClusterFuzz, Dec 20

Labels: ClusterFuzz-Verified
Status: Verified (was: Fixed)
ClusterFuzz testcase 6262342704431104 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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