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Issue metadata

Status: Verified
Owner:
Closed: Jul 19
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 1
Type: Bug



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Null-dereference READ in ash::WindowTreeHostManager::OnDisplayMetricsChanged

Project Member Reported by ClusterFuzz, Jul 19

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6322139771437056

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_asan_chrome_chromeos
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  ash::WindowTreeHostManager::OnDisplayMetricsChanged
  display::DisplayManager::NotifyMetricsChanged
  display::DisplayManager::UpdateDisplayBounds
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=575794:575806

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6322139771437056

Additional requirements: Requires Gestures

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jul 19

Components: UI>Shell
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, Jul 19

Labels: Test-Predator-Auto-Owner
Owner: sky@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/b4e6da646f25cca291318e50e7aa9dd05173dd65 (chromeos: makes ScreenProviderObserver an associated interface).

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.
Status: Fixed (was: Assigned)
The offending patch was reverted. I relanded the patch after fixing the null read.
Project Member

Comment 4 by ClusterFuzz, Jul 19

ClusterFuzz has detected this issue as fixed in range 575962:575964.

Detailed report: https://clusterfuzz.com/testcase?key=6322139771437056

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_asan_chrome_chromeos
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  ash::WindowTreeHostManager::OnDisplayMetricsChanged
  display::DisplayManager::NotifyMetricsChanged
  display::DisplayManager::UpdateDisplayBounds
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=575794:575806
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_chromeos&range=575962:575964

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6322139771437056

Additional requirements: Requires Gestures

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 5 by ClusterFuzz, Jul 19

Labels: ClusterFuzz-Verified
Status: Verified (was: Fixed)
ClusterFuzz testcase 6322139771437056 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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