This also looks similar to #706520 and #706520 (even though this one is from tsan). tsepez@, could you take a look since you are assigned on #706520.

ClusterFuzz has detected this issue as fixed in range 460910:460935.

Detailed report: https://clusterfuzz.com/testcase?key=6552878794932224

Fuzzer: tokenfuzz_pdf_april16
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x7bc000040000
Crash State:
  __tsan::CallUserSignalHandler
  rtl_sigaction
  CFX_ClipRgn::IntersectMaskRect
  
Sanitizer: thread (TSAN)

Recommended Security Severity: Low

Regressed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=460400:460403
Fixed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=460910:460935

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94YTkOJODcCMRYDA7oJe3Y1zYUXtdjpE0YSk5nXyNWXyvmoSezafo4IzpUR2jUYJOAB3pg7eEn65sDyrJND-phTBAjYr9xhnu3eVjmX2_Dl2f9GzrNyv5d9dM7_McihD0oMMBK6RuqTbhOWtfNZudVB0Fuc7iPWWyKZGoVNNddKM5mYWuwbuioSEck-jcSng283YRrwiPykO5pFN05dam8XhqcjPZ1FkJ3ZkUFLFQgmHa_AEP4Pws_2QjN401Sha6VTIZqvc918OP5xNx0m0bX4Sw1E2G8Hx7NCbOcMYKdKVGQQgv4yfSfmyOEJtl_7Rg9jcdtNrJngQwh06Q-wkGD2yYTHHey92HgLeoi5oEp7eu2t2msvBVyUaAiJA42_zEfaqo_fLfjCd5pVR4hDR__uFQVztQ?testcase_id=6552878794932224


Additional requirements: Requires Gestures

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

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

ClusterFuzz testcase 6552878794932224 is verified as fixed, so closing issue.

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

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot