This crash occurs very frequently on mac and windows platforms and is likely preventing the fuzzer mbarbella_webcomponents from making much progress. Fixing this will allow more bugs to be found.

Marking this bug as a blocker for next Beta release.

If this is incorrect, please add ClusterFuzz-Wrong label and remove the ReleaseBlock-Beta label.

Predator and CL could not provide any possible suspects.

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

Suspect CL: https://chromium.googlesource.com/chromium/src/+/e6da4f138ccefccc641cdc28eb60622df779a1fc

danakj@ -- 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!

ClusterFuzz has detected this issue as fixed in range 575315:575316.

Detailed report: https://clusterfuzz.com/testcase?key=5380202574905344

Fuzzer: mbarbella_webcomponents
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::ScrollbarLayerDelegate::PaintPart
  cc::PaintedScrollbarLayer::RasterizeScrollbarPart
  cc::PaintedScrollbarLayer::Update
  
Sanitizer: address (ASAN)

Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=575315:575316

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5380202574905344

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.