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Issue 867048 link

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Issue metadata

Status: Verified
Owner:
Last visit > 30 days ago
Closed: Jul 25
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Use-of-uninitialized-value in v8::internal::Scanner::SkipMultiLineComment

Project Member Reported by ClusterFuzz, Jul 24

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5939268292444160

Fuzzer: decoder_langfuzz
Job Type: linux_msan_d8
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  v8::internal::Scanner::SkipMultiLineComment
  v8::internal::Scanner::Scan
  v8::internal::Parser::ParseProgram
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_d8&range=54656:54657

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5939268292444160

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by ClusterFuzz, Jul 24

Components: Blink>JavaScript>Parser
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, Jul 24

Labels: Test-Predator-Auto-Owner
Owner: sattlerf@google.com
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/v8/v8/+/9c4200b2e95e3f75d48643a06985b4de70468d3c ([scanner] Faster SkipMultiLineComment by avoiding a copy.).

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: Security_Impact-Head
Project Member

Comment 4 by ClusterFuzz, Jul 25

ClusterFuzz has detected this issue as fixed in range 54657:54658.

Detailed report: https://clusterfuzz.com/testcase?key=5939268292444160

Fuzzer: decoder_langfuzz
Job Type: linux_msan_d8
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  v8::internal::Scanner::SkipMultiLineComment
  v8::internal::Scanner::Scan
  v8::internal::Parser::ParseProgram
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_d8&range=54656:54657
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_d8&range=54657:54658

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5939268292444160

See https://github.com/google/clusterfuzz-tools 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 5 by ClusterFuzz, Jul 25

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5939268292444160 is verified as fixed, so closing issue as verified.

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

Comment 6 by sheriffbot@chromium.org, Jul 25

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Project Member

Comment 7 by sheriffbot@chromium.org, Jul 28

Labels: M-69 Target-69
Project Member

Comment 8 by sheriffbot@chromium.org, Jul 28

Labels: Pri-1
Labels: -reward-topanel reward-0
This was caught almost immediately and reverted.
Project Member

Comment 10 by sheriffbot@chromium.org, Oct 31

Labels: -Restrict-View-SecurityNotify 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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