Predator and CL did not provide any possible suspects.
Using Code Search for the file, "opj_tcd_decode_tile" assigning to the concern owner.

@ochang -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

Sorry, probably not the right owner for this.

ClusterFuzz has detected this issue as fixed in range 499756:499820.

Detailed report: https://clusterfuzz.com/testcase?key=5294595335520256

Fuzzer: libFuzzer_pdf_jpx_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  opj_tcd_dc_level_shift_decode
  opj_tcd_decode_tile
  opj_j2k_decode_tile
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=395640:395746
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=499756:499820

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5294595335520256

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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 5294595335520256 is verified as fixed, so closing issue as verified.

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