The result is a list of CLs that change the crashed files. 

Author: Yuki Shiino
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/a5418786187f6af3327c9342845db1a32adfbbaf
Time: Wed Jun 28 10:22:26 2017
Lines 722-739 of file V8BindingForCore.cpp which potentially caused crash are changed in this cl (frame #1, "blink::ToExecutionContext").
Minimum distance from crash line to modified line: 0. (file: V8BindingForCore.cpp, crashed on: 722, modified: 722).

@yukishiino -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You

Issue 739061 has been merged into this issue.

I'm now working on https://chromium-review.googlesource.com/c/574509 as a fix.

Users experienced this crash on the following builds:

Win Dev 61.0.3153.0 -  0.55 CPM, 96 reports, 95 clients (signature v8::Context::Global)
Mac Dev 61.0.3153.4 -  0.76 CPM, 9 reports, 5 clients (signature v8::Context::Global)

If this update was incorrect, please add "Fracas-Wrong" label to prevent future updates.

- Go/Fracas

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/659015bc5eb341e9d3ccce40ba0293079f2c2e31

commit 659015bc5eb341e9d3ccce40ba0293079f2c2e31
Author: Yuki Shiino <yukishiino@chromium.org>
Date: Fri Jul 21 08:08:30 2017

v8binding: Fixes MutationCallback not to access the empty context.

MutationCallback holds a ScriptState and accesses it assynchronously.
So, MutationCallback should check the context if it's alive before
the uses.

Bug:  738299 
Change-Id: Ib16b37b2e90e5ba87117d7c6e1218f9df6d69a41
Reviewed-on: https://chromium-review.googlesource.com/574509
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488611}
[modify] https://crrev.com/659015bc5eb341e9d3ccce40ba0293079f2c2e31/third_party/WebKit/Source/bindings/core/v8/V8MutationCallback.h

 yukishiino@ can you please request CL from comment#9 to get merged to M61(Branch 3163).

So far there are just 4 crashes on latest Chrome Canary. Please find details from here : https://goto.google.com/unhcx

Thank pbommana@, it turned out that we need another fix.
Working at: https://chromium-review.googlesource.com/c/589047/

We may need to merge both of CLs (already submitted one and another one linked above).

Your change meets the bar and is auto-approved for M61. Please go ahead and merge the CL to branch 3163 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid @(ChromeOS), govind@(Desktop)

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

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9d2a22bba0533f6607120816ddd88f1cb00858ae

commit 9d2a22bba0533f6607120816ddd88f1cb00858ae
Author: Yuki Shiino <yukishiino@chromium.org>
Date: Thu Jul 27 14:17:42 2017

v8binding: Fixes MutationCallback not to access the empty context.

MutationCallback holds a ScriptState and accesses it assynchronously.
So, MutationCallback should check the context if it's alive before
the uses.

TBR=yukishiino@chromium.org

(cherry picked from commit 659015bc5eb341e9d3ccce40ba0293079f2c2e31)

Bug:  738299 
Change-Id: Ib16b37b2e90e5ba87117d7c6e1218f9df6d69a41
Reviewed-on: https://chromium-review.googlesource.com/574509
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#488611}
Reviewed-on: https://chromium-review.googlesource.com/589468
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#78}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/9d2a22bba0533f6607120816ddd88f1cb00858ae/third_party/WebKit/Source/bindings/core/v8/V8MutationCallback.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4e112e84ae592c82aef95065fa4d5def8ecea3bb

commit 4e112e84ae592c82aef95065fa4d5def8ecea3bb
Author: Yuki Shiino <yukishiino@chromium.org>
Date: Thu Jul 27 17:23:06 2017

v8binding: Fixes a misuse of ScriptState at V8MutationCallback.

V8MutationCallback is using a ScriptState without confirming that
the ScriptState is valid or not.  This CL fixes it to check it
before the actual use.

callback_.IsEmpty() and script_state_->ContextIdValid() are moved
to be the same order as callback_function.cpp.tmpl.

V8MutationCallback will be replaced with the generated version
in near future (hopefully).

This CL aims to fix a crash issue in a short term and will be
merged to M61.

Bug:  738299 
Change-Id: I7a17203ad13a86d62a327a48cfffaca223ca5d8f
Reviewed-on: https://chromium-review.googlesource.com/589047
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490004}
[modify] https://crrev.com/4e112e84ae592c82aef95065fa4d5def8ecea3bb/third_party/WebKit/Source/bindings/core/v8/V8MutationCallback.cpp

May I request another merge (of CL of #c16) to M61?

Before we approve merge to M61 for CL listed at #16, could you please confirm change is well baked/verified in Canary, having enough automation tests coverage and will be a safe merge to M61?

Yes, will do.  I should have done it before asking.  Thanks.  :)

ClusterFuzz has detected this issue as fixed in range 489985:490017.

Detailed report: https://clusterfuzz.com/testcase?key=4823416929779712

Fuzzer: inferno_layout_test_unmodified
Job Type: windows_asan_chrome_no_sandbox
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000000
Crash State:
  v8::Context::Global
  blink::ToExecutionContext
  blink::ExecutionContext::From
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=483281:483366
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=489985:490017

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4823416929779712


See https://github.com/google/clusterfuzz-tools 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 4823416929779712 is verified as fixed, so closing issue as verified.

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

Your change meets the bar and is auto-approved for M61. Please go ahead and merge the CL to branch 3163 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid @(ChromeOS), govind@(Desktop)

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

Pls merge you change to M61 branch 3163 before 3:00 PM PT on Monday so we can take it in for next week last M61 Dev release. Thank you.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/57cba57f14ec3c80d85ac8630b676846696319f9

commit 57cba57f14ec3c80d85ac8630b676846696319f9
Author: Yuki Shiino <yukishiino@chromium.org>
Date: Mon Jul 31 06:26:07 2017

v8binding: Fixes a misuse of ScriptState at V8MutationCallback.

V8MutationCallback is using a ScriptState without confirming that
the ScriptState is valid or not.  This CL fixes it to check it
before the actual use.

callback_.IsEmpty() and script_state_->ContextIdValid() are moved
to be the same order as callback_function.cpp.tmpl.

V8MutationCallback will be replaced with the generated version
in near future (hopefully).

This CL aims to fix a crash issue in a short term and will be
merged to M61.

TBR=yukishiino@chromium.org

(cherry picked from commit 4e112e84ae592c82aef95065fa4d5def8ecea3bb)

Bug:  738299 
Change-Id: I7a17203ad13a86d62a327a48cfffaca223ca5d8f
Reviewed-on: https://chromium-review.googlesource.com/589047
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#490004}
Reviewed-on: https://chromium-review.googlesource.com/593408
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#143}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/57cba57f14ec3c80d85ac8630b676846696319f9/third_party/WebKit/Source/bindings/core/v8/V8MutationCallback.cpp