this might be a suspected :

https://chromium.googlesource.com/chromium/src/+/e51c64c415fe268350cb451e4678284ae5c8433f

dmazzoni@ could you please look into this.please feel free to re-assigned back if needed. thanks in advance 

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6359173638127616

Fuzzer: inferno_twister
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000010
Crash State:
  blink::WebAXObject::showContextMenu
  gin::internal::Dispatcher<void
  v8::internal::FunctionCallbackArguments::Call
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_content_shell_drt&range=330379:330413

Minimized Testcase (0.11 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95-ZkdzFbjhSDRwCB8MkxBIIZi-Fb0gskNM6OALsLX8705t8G-3Ax2pltJoxItIiwaTkpZFmgQiPFcaNccGkZbu3_dFs8hJ59Wm022bd-ycJSV8VQo5JVLOUhXy7iyf3OPD1DJmNUmfqJ3bvxJubHvs1_uVeg?testcase_id=6359173638127616
<script>
          combobox = accessibilityController.focusedElement;
          combobox.showMenu();
    </script>


Filer: mmohammad

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b219d03ce85fc738a0bd8054395af4f03ad02544

commit b219d03ce85fc738a0bd8054395af4f03ad02544
Author: dmazzoni <dmazzoni@chromium.org>
Date: Thu Aug 04 17:12:07 2016

Fix crash in WebAXObject::showContextMenu

It was crashing if given the document node because it's not an element and
it has no parent.

BUG= 631807 

Review-Url: https://codereview.chromium.org/2207633003
Cr-Commit-Position: refs/heads/master@{#409817}

[add] https://crrev.com/b219d03ce85fc738a0bd8054395af4f03ad02544/third_party/WebKit/LayoutTests/accessibility/show-context-menu-crash.html
[modify] https://crrev.com/b219d03ce85fc738a0bd8054395af4f03ad02544/third_party/WebKit/Source/web/WebAXObject.cpp

ClusterFuzz has detected this issue as fixed in range 409589:409863.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6359173638127616

Fuzzer: inferno_twister
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000010
Crash State:
  blink::WebAXObject::showContextMenu
  gin::internal::Dispatcher<void
  v8::internal::FunctionCallbackArguments::Call
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_content_shell_drt&range=330379:330413
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_content_shell_drt&range=409589:409863

Minimized Testcase (0.11 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95-ZkdzFbjhSDRwCB8MkxBIIZi-Fb0gskNM6OALsLX8705t8G-3Ax2pltJoxItIiwaTkpZFmgQiPFcaNccGkZbu3_dFs8hJ59Wm022bd-ycJSV8VQo5JVLOUhXy7iyf3OPD1DJmNUmfqJ3bvxJubHvs1_uVeg?testcase_id=6359173638127616
<script>
          combobox = accessibilityController.focusedElement;
          combobox.showMenu();
    </script>


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.

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

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