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Issue metadata

Status: Verified
Owner:
Closed: Jan 12
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 3
Type: Bug



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Use-of-uninitialized-value in pcache1FetchNoMutex

Project Member Reported by ClusterFuzz, Dec 13

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6575449888784384

Fuzzer: libFuzzer_sqlite3_dbfuzz2_fuzzer
Fuzz target binary: sqlite3_dbfuzz2_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  pcache1FetchNoMutex
  getPageNormal
  ptrmapPut
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=614851:614852

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6575449888784384

Issue filed automatically.

See https://www.chromium.org/developers/testing/memorysanitizer#TOC-Reproducing-ClusterFuzz-Bugs for more information.
 
Project Member

Comment 1 by ClusterFuzz, Dec 13

Components: Internals>Storage
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, Dec 13

Cc: pwnall@chromium.org
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, Dec 13

Labels: Test-Predator-Auto-Owner
Owner: mpdenton@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/e3140a8f27345d395ea75fe619d730951a438e89 (Run SQLite DBFuzz2 on ClusterFuzz to fuzz for data corruption).

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.
Project Member

Comment 4 by sheriffbot@chromium.org, Dec 13

Labels: Target-72 M-72
Project Member

Comment 5 by sheriffbot@chromium.org, Dec 13

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 6 by sheriffbot@chromium.org, Dec 13

Labels: Pri-1
Labels: -Type-Bug-Security -Pri-1 -Restrict-View-SecurityTeam -Security_Severity-Medium -Security_Impact-Head -ReleaseBlock-Stable -M-72 -Target-72 Pri-3 Type-Bug
Dbfuzz2 doesn't find security bugs, derestricting.
Cc: -pwnall@chromium.org mpdenton@chromium.org
Owner: pwnall@chromium.org
pwnall@ there's a chance this is in our own code.
Project Member

Comment 10 by ClusterFuzz, Jan 12

ClusterFuzz has detected this issue as fixed in range 622204:622215.

Detailed report: https://clusterfuzz.com/testcase?key=6575449888784384

Fuzzer: libFuzzer_sqlite3_dbfuzz2_fuzzer
Fuzz target binary: sqlite3_dbfuzz2_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  pcache1FetchNoMutex
  getPageNormal
  ptrmapPut
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=614851:614852
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=622204:622215

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6575449888784384

See https://www.chromium.org/developers/testing/memorysanitizer#TOC-Reproducing-ClusterFuzz-Bugs for instructions to reproduce this bug locally.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Project Member

Comment 11 by ClusterFuzz, Jan 12

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 6575449888784384 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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