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Issue metadata

Status: WontFix
Owner:
Closed: Dec 1
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in content::AppCacheEntry::add_types

Project Member Reported by ClusterFuzz, Nov 17

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5680943932899328

Fuzzer: libFuzzer_appcache_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  content::AppCacheEntry::add_types
  content::AppCacheStorageImpl::StoreOrLoadTask::CreateCacheAndGroupFromRecords
  content::AppCacheStorageImpl::GroupLoadTask::RunCompleted
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=605710:605711

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5680943932899328

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Nov 17

Components: Blink>Storage>AppCache
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, Nov 17

Cc: mmoroz@chromium.org
Labels: ClusterFuzz-Auto-CC
Automatically adding ccs based on OWNERS file / target commit history.

If this is incorrect, please add ClusterFuzz-Wrong label.
Project Member

Comment 3 by ClusterFuzz, Nov 17

Labels: Test-Predator-Auto-Owner
Owner: mmoroz@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/f83007304ba201e3a0ee9eaf198d369aa48f6090 (Add appcache_fuzzer).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Cc: nedwilli...@gmail.com jsb...@chromium.org
Owner: pwnall@chromium.org
Assigning to Victor (AppCache owner) and CC'ing Ned (external fuzzer author).
Project Member

Comment 5 by ClusterFuzz, Dec 1

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 5680943932899328 appears to be flaky, updating reproducibility label.
Project Member

Comment 6 by ClusterFuzz, Dec 1

Status: WontFix (was: Assigned)
ClusterFuzz testcase 5680943932899328 is flaky and no longer crashes, so closing issue.

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

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