This issue is a security regression. If you are not able to fix this quickly, please revert the change that introduced it.

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

robhogan: might be another one for you to look at here.

This issue is a security regression. If you are not able to fix this quickly, please revert the change that introduced it.

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

Do you have time to look into this in the near term robhogan or should we try to find someone else to investigate it?

Yes, I can take it.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9ee43c961a1cb445684ac814724b43e4e5d645f3

commit 9ee43c961a1cb445684ac814724b43e4e5d645f3
Author: robhogan <robhogan@gmail.com>
Date: Thu Jan 19 18:33:44 2017

Don't clear floats when moving just some of the children in a ruby run

BUG= 681423 

Review-Url: https://codereview.chromium.org/2645473004
Cr-Commit-Position: refs/heads/master@{#444795}

[add] https://crrev.com/9ee43c961a1cb445684ac814724b43e4e5d645f3/third_party/WebKit/LayoutTests/fast/block/float/rubybase-children-moved-crash-expected.txt
[add] https://crrev.com/9ee43c961a1cb445684ac814724b43e4e5d645f3/third_party/WebKit/LayoutTests/fast/block/float/rubybase-children-moved-crash.html
[modify] https://crrev.com/9ee43c961a1cb445684ac814724b43e4e5d645f3/third_party/WebKit/Source/core/layout/LayoutRubyBase.cpp

ClusterFuzz has detected this issue as fixed in range 444763:444844.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6533935229304832

Fuzzer: ochang_domfuzzer
Job Type: linux_asan_chrome_v8_arm
Platform Id: linux

Crash Type: Heap-use-after-free READ 4
Crash Address: 0xb71283a4
Crash State:
  blink::LayoutBlockFlow::moveAllChildrenIncludingFloatsTo
  blink::LayoutBlockFlow::mergeSiblingContiguousAnonymousBlock
  blink::LayoutBlockFlow::removeChild
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_v8_arm&range=424153:424926
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_v8_arm&range=444763:444844

Minimized Testcase (0.40 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv97eqnlxgrYFdFDvTgVP_k8AyKn6B3pnKPpitGE84m19OApwfwjKxmrHkltCrPBv0V4J68UzH17xccK8BVvRp5-tn11PZjD8Yuk-ooueS3XQ_BEmAM4wmc0w_kBtHWv0B5SWFphVfLaAaJwYzaP5devHhHRFrExYE51t80Stozt4bRmyNCRpNad3xXkllQWqJ7tO4IzotiZTN8QbIVOwzZCgSfrX30gQaiYNotEAtVqL9QAnpVK7jaP7zOBS1tGMw3KjpMyNWHt6tjqpO2jj6xYGD1tLYrWzC0sLeldjYLRsescgjAZ4azFeQc-8NAO1632opcF3rAcmQwLQft-3kF-tBsN_WC3k-biT4MpV97LgxHcG-Xk?testcase_id=6533935229304832
<style>
.CLASS1{clip:rect(144ex);display:list-item;}
.CLASS13{padding-top:136%;float:right;</style>
<script>
function fuzz() {
document.designMode = 'on';
  document.execCommand("selectAll");
  document.execCommand("Strikethrough");
  document.execCommand("strikethrough");
}
 setTimeout(fuzz); </script><ruby>
<rt>
<rtc <a class="CLASS1" id="dom-fuzz-18590003">
<input <="" textarea="" class="CLASS9 CLASS13">


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 6533935229304832 is verified as fixed, so closing issue.

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

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