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Issue 850554 link

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Issue metadata

Status: Verified
Owner:
Last visit > 30 days ago
Closed: Jun 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Mac
Pri: 1
Type: Bug



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Null-dereference READ in quic::QuicSentPacketManager::OnAckFrameEnd

Project Member Reported by ClusterFuzz, Jun 7 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5752054753263616

Fuzzer: libFuzzer_net_quic_stream_factory_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  quic::QuicSentPacketManager::OnAckFrameEnd
  quic::QuicConnection::OnAckRange
  quic::QuicFramer::ProcessIetfAckFrame
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=564617:564643

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5752054753263616

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 7 2018

Components: Internals>Network
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, Jun 7 2018

Cc: nedwilli...@gmail.com
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, Jun 7 2018

Labels: Test-Predator-Auto-Owner
Owner: mpw@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/60637aee0733db686859db89ce72b948364cb20c (Landing Recent QUIC changes until Fri May 25 16:11:25 2018 +0000).

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.

Comment 4 by mpw@chromium.org, Jun 7 2018

Cc: mpw@chromium.org
Owner: fkastenholz@chromium.org
Similar to  crbug.com/850083  and  crbug.com/850476 .  Probably not a security issue since this code is guarded behind a flag that is default disabled.  fkastenholz to confirm.
Cc: fayang@chromium.org
Agreed with MPW@
See my comments in  crbug.com/850476 

Project Member

Comment 6 by ClusterFuzz, Jun 12 2018

Labels: OS-Mac
Project Member

Comment 7 by ClusterFuzz, Jun 22 2018

ClusterFuzz has detected this issue as fixed in range 569395:569417.

Detailed report: https://clusterfuzz.com/testcase?key=5752054753263616

Fuzzer: libFuzzer_net_quic_stream_factory_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  quic::QuicSentPacketManager::OnAckFrameEnd
  quic::QuicConnection::OnAckRange
  quic::QuicFramer::ProcessIetfAckFrame
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=564617:564643
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=569395:569417

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5752054753263616

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.
Project Member

Comment 8 by ClusterFuzz, Jun 22 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5752054753263616 is verified as fixed, so closing issue as verified.

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

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