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Issue metadata

Status: Verified
Owner:
Closed: Dec 2017
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in __ubsan::checkDynamicType

Project Member Reported by ClusterFuzz, Dec 2 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4675738879131648

Fuzzer: attekett_webaudio_fuzzer
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000001
Crash State:
  __ubsan::checkDynamicType
  HandleDynamicTypeCacheMiss
  __ubsan_handle_dynamic_type_cache_miss
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=521171:521177

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4675738879131648

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by ClusterFuzz, Dec 2 2017

Labels: Test-Predator-Auto-Owner
Owner: japhet@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/ae15c13530084329ac2509ccded45428d7d7d2c8 (Make DocumentThreadableLoader a ResourceOwner).

If this is incorrect, please remove the owner and apply the Test-Predator-Wrong-CLs label.
Project Member

Comment 2 by ClusterFuzz, Dec 4 2017

ClusterFuzz has detected this issue as fixed in range 521238:521247.

Detailed report: https://clusterfuzz.com/testcase?key=4675738879131648

Fuzzer: attekett_webaudio_fuzzer
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000001
Crash State:
  __ubsan::checkDynamicType
  HandleDynamicTypeCacheMiss
  __ubsan_handle_dynamic_type_cache_miss
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=521171:521177
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=521238:521247

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4675738879131648

See https://github.com/google/clusterfuzz-tools for more information.

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

Comment 3 by ClusterFuzz, Dec 4 2017

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4675738879131648 is verified as fixed, so closing issue as verified.

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

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