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Issue metadata

Status: WontFix
Owner:
Closed: Sep 14
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Heap-use-after-free in scoped_refptr<base::sequence_manager::internal::AssociatedThreadId>::operator->

Project Member Reported by ClusterFuzz, Sep 1

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4588024487477248

Fuzzer: libFuzzer_sequence_manager_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Heap-use-after-free READ 8
Crash Address: 0x60b0000086a8
Crash State:
  scoped_refptr<base::sequence_manager::internal::AssociatedThreadId>::operator->
  base::sequence_manager::TaskQueue::IsOnMainThread
  base::sequence_manager::TaskQueue::AcquireImplReadLockIfNeeded
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=588004:588005

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4588024487477248

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Sep 1

Components: Internals>Core Internals>TaskScheduler
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, Sep 1

Labels: Test-Predator-Auto-Owner
Owner: javierrobles@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/61246e800ddcedbe739b80e99e75777214b7e71a ([iOS][MF] Password view controller).

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.
Labels: M-70
Labels: Test-Predator-Wrong-CLs
This class isn't yet instantiated at any point. Can't be the cause.
Owner: ----
Status: Untriaged (was: Assigned)
Project Member

Comment 6 by sheriffbot@chromium.org, Sep 2

Labels: ReleaseBlock-Stable
This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
Project Member

Comment 7 by sheriffbot@chromium.org, Sep 2

Labels: Pri-1
Project Member

Comment 8 by sheriffbot@chromium.org, Sep 5

Labels: -Security_Impact-Head Security_Impact-Beta
Owner: farahcharab@chromium.org
Status: Assigned (was: Untriaged)
Hi @farahcharab, assigning to you since you wrote most of the code involved in the stack traces and allocator stacks.
Noting that this is probably the same bug as  issue 880243 , which did pick out the correct buggy CL (I think).
Components: -Internals>TaskScheduler Internals>SequenceManager
Owner: altimin@chromium.org
@altimin (farahcharab@ is no longer active I believe)
Project Member

Comment 12 by ClusterFuzz, Sep 14

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 4588024487477248 appears to be flaky, updating reproducibility label.
Project Member

Comment 13 by ClusterFuzz, Sep 14

Status: WontFix (was: Assigned)
ClusterFuzz testcase 4588024487477248 is flaky and no longer crashes, so closing issue.

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

Comment 14 by sheriffbot@chromium.org, Dec 22

Labels: -Restrict-View-SecurityTeam allpublic
This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

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