Test Predator has given the following results:

Unify parsing of cross ref table v4. by art-snake@yandex-team.ru
Changelist touched lines near the crashed line in frame #4 CPDF_DataAvail::CheckLinearizedData() (distance = 0 lines away)
Top touched frame is #4 CPDF_DataAvail::CheckLinearizedData(in cpdf_data_avail.cpp)
Changed files cpdf_data_avail.cpp, cpdf_parser.cpp, cpdf_parser.h, cpdf_parser_embeddertest.cpp, with the same CrashedDirectory(core/fpdfapi/parser) as cpdf_data_avail.cpp (in frame#4, frame#5)
Touched files in stacktrace - cpdf_data_avail.cpp
Changed files cpdf_data_avail.cpp, cpdf_parser.cpp, cpdf_parser.h, cpdf_parser_embeddertest.cpp, with the same CrashedComponent(Internals>Plugins>PDF) as fpdf_dataavail.cpp (in frame#6), cpdf_data_avail.cpp (in frame#4, frame#5)
Improve readability for CPDF_LinearizedHeader. by art-snake@yandex-team.ru
Changelist touched lines near the crashed line in frame #4 CPDF_DataAvail::CheckLinearizedData() (distance = 4 lines away)
Top touched frame is #4 CPDF_DataAvail::CheckLinearizedData(in cpdf_data_avail.cpp)
Changed files cpdf_data_avail.cpp, cpdf_linearized_header.cpp, cpdf_linearized_header.h, with the same CrashedDirectory(core/fpdfapi/parser) as cpdf_data_avail.cpp (in frame#4, frame#5)
Touched files in stacktrace - cpdf_data_avail.cpp
Changed files cpdf_data_avail.cpp, cpdf_linearized_header.cpp, cpdf_linearized_header.h, with the same CrashedComponent(Internals>Plugins>PDF) as fpdf_dataavail.cpp (in frame#6), cpdf_data_avail.cpp (in frame#4, frame#5)

Assigning this issue to the reviewer @dsinclair, as unable to assign it to art-snake@yandex-team.ru.

@dsinclair -- Could you please look into this issue, kindly reassign if it has nothing to do with the changes.

Thank You.

Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

ClusterFuzz has detected this issue as fixed in range 506737:506775.

Detailed report: https://clusterfuzz.com/testcase?key=6319030049964032

Fuzzer: libFuzzer_pdfium_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  m_pDocument->GetParser()->GetTrailer()
  CPDF_DataAvail::CheckLinearizedData
  CPDF_DataAvail::IsFormAvail
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=506472:506484
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=506737:506775

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6319030049964032

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 6319030049964032 is verified as fixed, so closing issue as verified.

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