Bad thing #1: we don't have an owner for third_party/expat.
Bad thing #2: we have both libxml and expat in Chromium :(

ClusterFuzz has detected this testcase as flaky and is unable to reproduce it in the original crash revision. Skipping fixed testing check and marking it as potentially fixed.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6133756083830784

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologProcessor
  prologInitProcessor
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295

Minimized Testcase (0.00 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv97R2JKdc5ALQEhAO8rKQjqTuomHpzl4a_B8glOAVDGYf70_kjiFenVJgZTLEuT2rTShkLT5N50N84IOuAyGIQlr-vuF8sd6VSz6m2fKIhhoxrFWbTE-123zmW9SDrT43XTCXtogW2KJNfxImWGlDRk6QsM8UA?testcase_id=6133756083830784
<?


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.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6498488057856000

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologProcessor
  prologInitProcessor
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295

Minimized Testcase (0.00 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95rslvRhGwIFxFjF2y1zJKaVQ-HqNlGHacZ-_4L7TbHbCGqI0Pg8ustDOR9o-iu19nSaiRr3gwD6H3oooDHDV1LBo9XHudhk_iFG5lyx4f9MK9ptso_KKJAxGwd6YvBZfY1cIywyVfUf32I-s3gimSKMH_Ffg?testcase_id=6498488057856000
<?


Filer: mmoroz

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

ClusterFuzz has detected this testcase as flaky and is unable to reproduce it in the original crash revision. Skipping fixed testing check and marking it as potentially fixed.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6498488057856000

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologProcessor
  prologInitProcessor
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295

Minimized Testcase (0.00 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95rslvRhGwIFxFjF2y1zJKaVQ-HqNlGHacZ-_4L7TbHbCGqI0Pg8ustDOR9o-iu19nSaiRr3gwD6H3oooDHDV1LBo9XHudhk_iFG5lyx4f9MK9ptso_KKJAxGwd6YvBZfY1cIywyVfUf32I-s3gimSKMH_Ffg?testcase_id=6498488057856000
<?


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.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6240867916709888

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologProcessor
  prologInitProcessor
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295

Minimized Testcase (0.00 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv976RlFZg99SS2fqIJV8NsSTCVLBqzLG4PbsDvHFHgWUv_9cTD8MI5nLX6M9aH7ai6gf4keIqc8pwUa_DOMlk9WYcRdyVHtFXLmnfX-aahEh4lpHG28MrZyaq6DsOw8irfMGPDUWc_ZOODP92e-yhLLos4rmDg?testcase_id=6240867916709888
<?


Filer: ajha

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

The same as per  bug 628195 .

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6679707215200256

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologProcessor
  prologInitProcessor
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295

Minimized Testcase (0.00 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv9632E2_16Qf-fiYKPfhadOmcjblGtxzOpddyvY4XnSRSYGdnlaYGxdHb_ob_LYF6RVP3Qxm7KpaTpJ0EwxUsucbNfBV5a-wZRokLZfYOv_qOPG8qLMECczJgE2wc2UmbKIlQabngXFR4HUnj3sk2XDi5WR1Jg?testcase_id=6679707215200256
<?


Filer: rnimmagadda

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

Gentle Ping.

@pthatcher: Could you please provide some update on this issue.

Thank you.

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

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

ClusterFuzz has detected this issue as fixed in range 459024:459032.

Detailed report: https://clusterfuzz.com/testcase?key=6679707215200256

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologInitProcessor
  XML_ParseBuffer
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=459024:459032

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv95dnCQJn3WZjflG-zfAhp9id0x1-KnCsAvdbh1gyMtPG6uGLxYMQQwuQnAvuWmjxtOIPkTBd5shylKeAq-DipUR040z1Hq80K79EtkMAiNqZL38C5F_w0PDBDAQTtCfAAM6icv_1xX8XMLvd2qsxvjs35xWGF_ap5DIMbNvs1fB2kBspRaTStfFIgxxOMRFPiUKUfTNyGg1SMjrh6rdIa5s5NwN5qeOW3EiO5d6XCANtyfmTjvD62tpk2Xw8klFvLgAArQHKK_86CHQFuPii0dKqqi-HkSi7oq4yy_Dsrj-59dbV4fjzIEH0hpksHO-habrIATIBF7jsY3HiqMum6q0YpuxkAKrdhR21cCwGaPTSXKrtUw?testcase_id=6679707215200256


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 has detected this issue as fixed in range 459024:459032.

Detailed report: https://clusterfuzz.com/testcase?key=6240867916709888

Fuzzer: libfuzzer_expat_xml_parse_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  big2_prologTok
  prologInitProcessor
  XML_ParseBuffer
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=397275:397295
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=459024:459032

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94QB5Oyi-W9dAQnwqoxjMW1C2sZcOcgWyM4AsSTi3YPrBnAzHn3WUoUoPBAO3dK4UYEgnUXxGaJwOg20z-taZHWzOfoMaZTb2mbd6TEsiXN8mK7knlUxZg68359YUqIM2vny7AqCLPk6pXlqVKSdoXEQtIJvrd52LaY6hzOyURppeo-1Qi7Iva1UQveSRicejjnkKrIc--O8yzXGMqVQy23xmUvYyxkbRP34-lzFAIif4fMXQ7eEc75BnDVFuA0u64G2U6J4f6jFmAaSKASaUQ_qnMo6ZlyIVoSYOYCReJB6HF0KudngnmAW8yhGgpkyCIA7MsPgXaZLZ5T9GASNZLmUuIrC4NLBoG7hOPO6iR4cK-o5Bw?testcase_id=6240867916709888


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 6240867916709888 is verified as fixed, so closing issue.

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

qingchengl fixed this with the expat roll in r459025.