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 542539:542658.

Detailed report: https://clusterfuzz.com/testcase?key=6055673889292288

Fuzzer: libFuzzer_base_json_reader_fuzzer
Job Type: mac_libfuzzer_chrome_asan
Platform Id: mac

Crash Type: Use-after-poison READ 1
Crash Address: 0x61d00000188c
Crash State:
  base::IteratorRangeToNumber<base::BaseHexIteratorRangeToIntTraits<char const*> >
  base::IteratorRangeToNumber<base::BaseHexIteratorRangeToIntTraits<char const*> >
  base::HexStringToInt
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=541216:541311
Fixed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=542539:542658

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6055673889292288

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.

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chrome/tools/clusterfuzz/+/c7e603597a7316e0591bdbe4cadfd5aefa66f393

commit c7e603597a7316e0591bdbe4cadfd5aefa66f393
Author: Abhishek Arya <inferno@chromium.org>
Date: Wed Mar 14 19:39:52 2018

ClusterFuzz testcase 6055673889292288 is verified as fixed, so closing issue as verified.

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

This bug requires manual review: M66 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), josafat@(ChromeOS), abdulsyed@(Desktop)

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

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