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Issue metadata

Status: Duplicate
Merged: issue 868477
Owner: ----
Closed: Jul 30
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Undefined-shift in CFX_BitStream::GetBits

Project Member Reported by ClusterFuzz, Jul 28

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4702495851675648

Fuzzer: libFuzzer_pdf_hint_table_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  CFX_BitStream::GetBits
  CPDF_HintTables::ReadSharedObjHintTable
  HintTableForFuzzing::Fuzz
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=578609:578611

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4702495851675648

Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.
 
Project Member

Comment 1 by ClusterFuzz, Jul 28

Components: Internals>Plugins>PDF
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

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

Comment 2 by ClusterFuzz, Jul 28

Cc: art-sn...@yandex-team.ru
Labels: Test-Predator-Auto-CC
Automatically adding ccs based on suspected regression changelists:

Parse obj nums range within Hint tables for shared groups. by art-snake@yandex-team.ru - https://pdfium.googlesource.com/pdfium/+/b3bab6ce43cab8f4cd35e2205491c278a400d733

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label.
Mergedinto: 868477
Status: Duplicate (was: Untriaged)
Project Member

Comment 4 by ClusterFuzz, Jul 31

ClusterFuzz has detected this issue as fixed in range 579187:579188.

Detailed report: https://clusterfuzz.com/testcase?key=4702495851675648

Fuzzer: libFuzzer_pdf_hint_table_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  CFX_BitStream::GetBits
  CPDF_HintTables::ReadSharedObjHintTable
  HintTableForFuzzing::Fuzz
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=578609:578611
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=579187:579188

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4702495851675648

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.

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

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