Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/e7e9abbb51309caae63f0df4754f5f633bc3da77 (Deeper plumbing of CanvasResource into canvas and OffscreenCanvas).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4eb4529e5b5eb63bba7afdf80fa6cd7b3d466f22

commit 4eb4529e5b5eb63bba7afdf80fa6cd7b3d466f22
Author: Justin Novosad <junov@chromium.org>
Date: Mon Jul 23 23:39:44 2018

Add missing null check to OffscreenCanvas::PushFrame

BUG= 866273 

Change-Id: Ie53ffb789b005089813f11f26f4425a8f8884b0f
Reviewed-on: https://chromium-review.googlesource.com/1147461
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577326}
[modify] https://crrev.com/4eb4529e5b5eb63bba7afdf80fa6cd7b3d466f22/third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.cc

ClusterFuzz has detected this issue as fixed in range 577293:577296.

Detailed report: https://clusterfuzz.com/testcase?key=6028342625828864

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::OffscreenCanvas::PushFrame
  blink::OffscreenCanvasRenderingContext2D::PushFrame
  blink::OffscreenCanvas::BeginFrame
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=576704:576705
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=577293:577296

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6028342625828864

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 6028342625828864 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 M69. Please go ahead and merge the CL to branch 3497 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), kariahda@(iOS), cindyb@(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/+/c163f8a3020e34f307ff32dc00433914e5c07f5e

commit c163f8a3020e34f307ff32dc00433914e5c07f5e
Author: Justin Novosad <junov@chromium.org>
Date: Wed Jul 25 15:17:26 2018

Add missing null check to OffscreenCanvas::PushFrame

BUG= 866273 
TBR=junov@chromium.org

(cherry picked from commit 4eb4529e5b5eb63bba7afdf80fa6cd7b3d466f22)

Change-Id: Ie53ffb789b005089813f11f26f4425a8f8884b0f
Reviewed-on: https://chromium-review.googlesource.com/1147461
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#577326}
Reviewed-on: https://chromium-review.googlesource.com/1150205
Reviewed-by: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/branch-heads/3497@{#69}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/c163f8a3020e34f307ff32dc00433914e5c07f5e/third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.cc