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Issue metadata

Status: Fixed
Owner:
Closed: Jun 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug

Blocked on:
issue 734550

Blocking:
issue 734319


Participants' hotlists:
Hotlist-AsmJsParser


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Fatal error in v8::Isolate::Disposev8::Utils::ReportApiFailure

Project Member Reported by ClusterFuzz, Jun 13 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4614355344949248

Fuzzer: libFuzzer_v8_wasm_asmjs_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Fatal error
Crash Address: 
Crash State:
  v8::Isolate::Disposev8::Utils::ReportApiFailure
  v8::Utils::ApiCheck
  v8::Isolate::Dispose
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=478669:478745

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4614355344949248


Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 
Components: Blink>JavaScript
Labels: Test-Predator-Wrong-CLs M-61
Cc: clemensh@chromium.org mstarzinger@chromium.org
Labels: -Pri-1 Pri-2
Status: Available (was: Untriaged)
This is caused by the v8_wasm_asmjs_fuzzer faking the WASM module to be derived from a JS-source. The module however does not have asm.js source position mapping. The same repro also fires a whole slew of DCHECKs throughout the system (e.g. the DCHECKs in WasmSharedModuleData::is_asm_js). I am not sure we actually should make all of this fail gracefully.

This report is not a release blocker however, lowering priority.
Owner: mstarzinger@chromium.org
Status: Assigned (was: Available)
Need to discuss with WebAssembly folks next week. Probably gonna land on my plate.
Blocking: 734319
Blockedon: 734550
Status: Fixed (was: Assigned)
Fixed by removing fuzzer, details in  issue 734550 .

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