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Issue metadata

Status: Duplicate
Merged: issue 768150
Owner: ----
Closed: Oct 2017
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in net::DnsTransactionImpl::DoCallback

Project Member Reported by ClusterFuzz, Oct 21 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6372972121292800

Fuzzer: libFuzzer_net_host_resolver_impl_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  net::DnsTransactionImpl::DoCallback
  base::debug::TaskAnnotator::RunTask
  base::MessageLoop::RunTask
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=503770:503839

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6372972121292800

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Oct 21 2017

Components: Internals>Core
Labels: Test-Predator-AutoComponents
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, Oct 21 2017

Labels: Test-Predator-AutoOwner
Owner: mge...@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/01d1d1c15c54f84470463190d2da98e5b6755d97 (HostResolverImpl fuzzer fixes).

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

Comment 3 by mge...@chromium.org, Oct 23 2017

Components: -Internals>Core Internals>Network>DNS
Labels: Test-Predator-Wrong-CLs Test-Predator-Wrong-Components
My CL was just fixing the fuzzer, it didn't introduce the bug.

This looks like it might be the same crash as  issue 768150 , but I'll have to look at it more to be sure.

Comment 4 by mge...@chromium.org, Oct 23 2017

Mergedinto: 768150
Owner: ----
Status: Duplicate (was: Assigned)
Yeah, same crash.
Project Member

Comment 5 by ClusterFuzz, Nov 1 2017

ClusterFuzz has detected this issue as fixed in range 512844:512867.

Detailed report: https://clusterfuzz.com/testcase?key=6372972121292800

Fuzzer: libFuzzer_net_host_resolver_impl_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  net::DnsTransactionImpl::DoCallback
  base::debug::TaskAnnotator::RunTask
  base::MessageLoop::RunTask
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=503770:503839
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=512844:512867

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6372972121292800

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

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Labels: -Test-Predator-AutoComponents Test-Predator-Auto-Components
Labels: -Test-Predator-AutoOwner Test-Predator-Auto-Owner

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