caryclark@google.com: Assigning this bug to you for triage.
It looks very similar to  issue 643665  so please feel free to mark it as a duplciate.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/38994ad4f5c7334d0b2d510f8411674183abc826

commit 38994ad4f5c7334d0b2d510f8411674183abc826
Author: skia-deps-roller <skia-deps-roller@chromium.org>
Date: Tue Sep 06 20:50:27 2016

Roll src/third_party/skia/ f54c00e81..6669010af (9 commits).

https://chromium.googlesource.com/skia.git/+log/f54c00e817b1..6669010af4e6

$ git log f54c00e81..6669010af --date=short --no-merges --format='%ad %ae %s'
2016-09-06 reed check for null-layer-paint after prev fix to savelayer ops
2016-09-06 msarett Delete SkColorSpace::kUnknown_Named, remove fNamed field
2016-09-06 csmartdalton Improve usage of window rectangles
2016-09-06 brucedawson Work around VS 2015 Update 3 optimizer internal compiler error
2016-09-06 halcanary SkDocument: turn off SK_SUPPORT_LEGACY_DOCUMENT_API
2016-09-06 reed test dont-clip-layer
2016-09-06 caryclark provide safe exit for runaway intersections
2016-09-06 caryclark compare degenerates with tolerance
2016-09-06 bsalomon Update Windows build to use VULKAN_SDK rather than VK_SDK_PATH

BUG= 643855 , 643933 , 643665 

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
TBR=caryclark@google.com

Review-Url: https://codereview.chromium.org/2312993002
Cr-Commit-Position: refs/heads/master@{#416722}

[modify] https://crrev.com/38994ad4f5c7334d0b2d510f8411674183abc826/DEPS

ClusterFuzz has detected this issue as fixed in range 416652:416734.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6667406292549632

Fuzzer: afl_skia_path_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x615fffff810c
Crash State:
  SuperBlitter::blitH
  walk_convex_edges
  sk_fill_path
  
Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=402185:402404
Fixed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=416652:416734

Minimized Testcase (0.04 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97VCq-8cUuPaWbQKvSecCBfKhVuFUlnHF_uQXgX-Vx70B8L337DTVBiI_8m7sCXw9EqZGbtFffqwxE_yy9Rihiw4voNsU_KQQtYyVg7548PUusagHcFIgL0BO4RYnEQb-BlxAktCRaq4JwEdDfQZi8e3MKvzw?testcase_id=6667406292549632

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.

ClusterFuzz testcase is verified as fixed, closing issue.

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

The following revision refers to this bug:
  https://skia.googlesource.com/skia.git/+/406e44949c3c766a74e18b49f2f1f4e29f862ba8

commit 406e44949c3c766a74e18b49f2f1f4e29f862ba8
Author: caryclark <caryclark@google.com>
Date: Tue Sep 06 15:54:10 2016

compare degenerates with tolerance

Conics with very large w values can
be approximated with two straight lines.

This avoids iterating endlessly in an
attempt to create quadratics with unstable
numerics.

Check to see if the first chop generated
a pair of lines within the default
point comparison tolerance.

R=reed@google.com
BUG= 643933 ,  643665 
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2312923002

Review-Url: https://codereview.chromium.org/2312923002

[modify] https://crrev.com/406e44949c3c766a74e18b49f2f1f4e29f862ba8/src/core/SkGeometry.cpp
[modify] https://crrev.com/406e44949c3c766a74e18b49f2f1f4e29f862ba8/tests/PathTest.cpp

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