Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/49b21cbe24bd1c13b1a846c75f0ee0ed88e19913 (Add a fuzzer for the Windows sandbox IPC parser.).

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

Nice work Will!

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

ClusterFuzz has detected this issue as fixed in range 507326:507330.

Detailed report: https://clusterfuzz.com/testcase?key=4865096915615744

Fuzzer: libFuzzer_sandbox_ipc_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 4
Crash Address: 0x60b00000038c
Crash State:
  sandbox::ActualCallParams<3ul, 1024ul>::GetSize
  sandbox::GetActualBufferSize
  sandbox::CrossCallParamsEx::CreateFromBuffer
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=507274:507281
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=507326:507330

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4865096915615744

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

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

ClusterFuzz testcase 4865096915615744 is verified as fixed, so closing issue as verified.

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

Both regressed and fixed in M63, removing ReleaseBlock-Stable

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