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Issue 691750 link

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Issue metadata

Status: Fixed
Owner:
Closed: Feb 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Crash in base::PostDelayedTaskWithTraits

Project Member Reported by ClusterFuzz, Feb 13 2017

Issue description

Components: Internals>TaskScheduler
Labels: Test-Predator-Correct-CLs M-58
Owner: fdoray@chromium.org
Status: Assigned (was: Untriaged)
The result is a list of CLs that change the crashed files. 

Author: fdoray
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/cb664bc9e179ed2ac87ce32a1d862160243be48b
Time: Mon Feb 13 16:45:02 2017
Lines 76-79 of file url_request_simple_job.cc which potentially caused crash are changed in this cl (frame #5, "net::URLRequestSimpleJob::ReadRawData").
Minimum distance from crash line to modified line: 0. (file: url_request_simple_job.cc, crashed on: 74, modified: 74).

Comment 2 by fdoray@chromium.org, Feb 14 2017

Status: Started (was: Assigned)
Project Member

Comment 3 by bugdroid1@chromium.org, Feb 16 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f2647997874eead6de0e93308011b55b6ae9160d

commit f2647997874eead6de0e93308011b55b6ae9160d
Author: fdoray <fdoray@chromium.org>
Date: Thu Feb 16 15:24:09 2017

Add ScopedTaskScheduler in URLRequestDataJobFuzzerHarness.

net::URLRequestSimpleJob uses the base/task_scheduler/post_task.h
and thus can only be used when there is a registered TaskScheduler.

Verified using reproducer testcase that this fixes issue
 crbug.com/691750 .

BUG= 691750 

Review-Url: https://codereview.chromium.org/2697843002
Cr-Commit-Position: refs/heads/master@{#450971}

[modify] https://crrev.com/f2647997874eead6de0e93308011b55b6ae9160d/net/url_request/url_request_data_job_fuzzer.cc

Comment 4 by fdoray@chromium.org, Feb 16 2017

Status: Fixed (was: Started)
Project Member

Comment 5 by ClusterFuzz, Feb 17 2017

ClusterFuzz has detected this issue as fixed in range 450954:451004.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5662321579130880

Fuzzer: libfuzzer_net_data_job_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  base::PostDelayedTaskWithTraits
  base::PostTaskWithTraits
  base::PostTaskAndReplyTaskRunner::PostTask
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=449962:449983
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=450954:451004

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv966Xk9ZfjbKaFGBax7iWTrq2TPeavLf4AlqpR9JgYVbRB5fdWDbfqiFQW1oChy4BaG1OAVsL7h32RbUWrBY6oa7FcRRdcGjISIGM2YK-BQeJBimsXaoXSnHSqwiqBY4kRvqDQaPRg7gZEZdmDcnNCYmiN45e0ZMV6nXu-e8iiC3tjo9hOP6Fg0ikw04V_4qpkAe45rnyII17suwALehtX08eNq4rMbFJAj-nyzxI6HEsQgMtRBN6cMYRjD7GmdAiEm0A5b6-ah02_mHHMYzCFyN8zssxzNIeyd39uif6zpUCmzTCXtUck6TUYgWGfWl6fQYtRonttv8J_lfsM7ZSWVoSuUnQ7o2F8tpE2pLPfkO_5nYiI9xOgYN9xONi53S7NBR7O2FwOoCdNLvoJcOuJFgrVNj8w?testcase_id=5662321579130880


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.

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