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Issue metadata

Status: Duplicate
Merged: issue v8:287
Owner:
Closed: Nov 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Timeout in v8_regexp_parser_fuzzer

Project Member Reported by ClusterFuzz, Nov 8 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5503568022077440

Fuzzer: libFuzzer_v8_regexp_parser_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Timeout (exceeds 25 secs)
Crash Address: 
Crash State:
  v8_regexp_parser_fuzzer
  
Sanitizer: undefined (UBSAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5503568022077440

Issue filed automatically.

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

Note: This crash might not be reproducible with the provided testcase. That said, for the past 14 days we've been seeing this crash frequently. If you are unable to reproduce this, please try a speculative fix based on the crash stacktrace in the report. The fix can be verified by looking at the crash statistics in the report, a day after the fix is deployed. We will auto-close the bug if the crash is not seen for 14 days.
 
Cc: kkaluri@chromium.org
Components: Blink>JavaScript
Labels: Test-Predator-Wrong CF-NeedsTriage
Unable to provide possible suspect using Predator, CL and Code Search.
Could someone please look into the issue.

Thank You.
Owner: jgruber@chromium.org
Status: Assigned (was: Untriaged)
Jakob, can you check?
There are no \b or \B in the input, so I am not sure if it's a dupe of the old bug.
Looks like "((..)|(.))*" causes exponential explosion, which is bad.
Mergedinto: v8:287
Status: Duplicate (was: Assigned)
Yes this looks like exponential backtracking, thanks for triaging.

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