Cary just fixed something similar in  issue 684553 ...

Assigning to caryclark@. please feel free change untriaged if that is not the case.
Thank you.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/28da2837040cd116dd2d854dd3268723ca219f11

commit 28da2837040cd116dd2d854dd3268723ca219f11
Author: Cary Clark <caryclark@skia.org>
Date: Tue Mar 21 15:18:11 2017

fix fuzz

corrupted intersection point lists
can loop forever. Add a safety
hatch to abort after a large number
of iterations.

TBR=kjlubick@google.com
BUG= 700679 

Change-Id: Ifd4b180b47ba3bbde38ade0bb13b16b8d645c1cb
Reviewed-on: https://skia-review.googlesource.com/9967
Reviewed-by: Cary Clark <caryclark@skia.org>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

[modify] https://crrev.com/28da2837040cd116dd2d854dd3268723ca219f11/src/pathops/SkOpSegment.h
[modify] https://crrev.com/28da2837040cd116dd2d854dd3268723ca219f11/src/pathops/SkOpSegment.cpp
[modify] https://crrev.com/28da2837040cd116dd2d854dd3268723ca219f11/src/pathops/SkOpContour.h
[modify] https://crrev.com/28da2837040cd116dd2d854dd3268723ca219f11/tests/PathOpsOpTest.cpp
[modify] https://crrev.com/28da2837040cd116dd2d854dd3268723ca219f11/src/pathops/SkPathOpsCommon.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a66325b07651c26ae4a05acbbf22c28c0f934c29

commit a66325b07651c26ae4a05acbbf22c28c0f934c29
Author: skia-deps-roller@chromium.org <skia-deps-roller@chromium.org>
Date: Tue Mar 21 16:39:02 2017

Roll src/third_party/skia/ 1683f786c..271d495a6 (8 commits)

https://skia.googlesource.com/skia.git/+log/1683f786cadf..271d495a68db

$ git log 1683f786c..271d495a6 --date=short --no-merges --format='%ad %ae %s'
2017-02-15 halcanary check-headers-self-sufficient: update
2017-03-21 caryclark fix fuzz
2017-03-21 robertphillips Exclude Vulkan from running PreFlushCallbackTest
2017-03-21 msarett Compatible use of png_set_iCCP
2017-03-21 kjlubick Add Chromecast Perf jobs
2017-03-17 liyuqian Combine some duplicate code in AA using template
2017-03-20 stephana Move build tasks to MacOS 10.12
2017-03-21 egdaniel In Vulkan make sure to add barriers between write operations

Created with:
  roll-dep src/third_party/skia
BUG= 700679 


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
TBR=fmalita@chromium.org

Change-Id: Ia03ff5a174dcca621a2c932b7c612bcd66b13671
Reviewed-on: https://chromium-review.googlesource.com/457269
Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#458435}
[modify] https://crrev.com/a66325b07651c26ae4a05acbbf22c28c0f934c29/DEPS

ClusterFuzz has detected this issue as fixed in range 458423:458454.

Detailed report: https://clusterfuzz.com/testcase?key=6443787766464512

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Timeout (exceeds 25 secs)
Crash Address: 
Crash State:
  skia_pathop_fuzzer
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=420614:420702
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=458423:458454

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv97Pa6OFyQJZ8AW6xCnqhPdQIqWJxxBmQd51UBKxp37wckQ181HeWd9fcdkPGphsaIprE0NTkwvk3emCfAVfg6ilGhxpMJz3bGNK-q9PPIQyiQHtIaslKqVAWJYBvnKli816ag_O3V2_eXkabRYezQ0wQoMEJ2g4wZx1h4VS1PVLolmpEHGItKu6OhZb43sN-7rA5mDIkDkrTb6C4PlDv_BJVayqoZ7QERacHKJF_cySwSTFmZRGXSN1O__vqSWbmQs8XJ50DOyDIbBxKAKq0xLs-VOFk7i2GwZBfIXmIdE0oL0BkiKy6QGwQ-L8nwh1fQoQdh7-VRDphyajLzl3sodb__dYkhioTlzIevRoS4IupbF-Qgs?testcase_id=6443787766464512


See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.