Looks similar to  bug 705738 . caryclark: Can you please take a look?

ClusterFuzz has detected this issue as fixed in range 460139:460171.

Detailed report: https://clusterfuzz.com/testcase?key=5069196938706944

Fuzzer: ifratric_pdf_generic
Job Type: windows_syzyasan_chrome
Platform Id: windows

Crash Type: Heap-buffer-underflow READ 4
Crash Address: 0x2af4729f
Crash State:
  SkiaState::ClipRestore
  CFX_SkiaDeviceDriver::RestoreState
  CFX_RenderDevice::RestoreState
  
Memory Tool: SYZYASAN

Regressed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=458746:458879
Fixed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=460139:460171

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv966XWtHM6g-8KJDlnaAnd_exuMMTIhP33fHicRWxy_gnDVhSFnBYvqxJLPujOfiYNh9_BcUfiRvj-iAuLwj8GN6twkAgmlI0DVKcpqpoevZXcYlAAZ63IGku7svukQhmSGrm3O1D-e0vgxd7fnPk_qe8mJKo5wwKszd86T0PQSMfygQnhbg9QwJUIIu5RBFsrf3Bt31LVtK7lIUmW1StbnDPIIgnhL-Q7flZmQLvStQPXAqppJs3g2BGcdeeYTiCDci7vsNsCC-Ik4nH5fm79f5F6nv-7XCX4gBmE_LsDpxJfCaduAeZMRbxcq2tqD4XQzFParwGvn5HAw7fW1QqzYdjBns_UMEU0vjA1F4JWTncVdO2Q3R7KaQQcVz8MNM6ApOyD0wPth-ivBoPZ4i8dmbfXRAMg?testcase_id=5069196938706944


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 5069196938706944 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