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Issue 637968 link

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Issue metadata

Status: Verified
Owner:
Last visit > 30 days ago
Closed: Aug 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Crash in oppT

Project Member Reported by ClusterFuzz, Aug 15 2016

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6069905155948544

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000080
Crash State:
  oppT
  findOppT
  SkTSect<SkDCubic, SkDConic>::extractCoincident
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=405990:406128

Minimized Testcase (0.42 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95Jb1EHvhh0fsdN5HXSyONLZGeO1ncUJZR0TSN8hQqFfcct8poZTpQZMHxnxZ1O_I7dreORTBWzoIDWrYSrBcrtnL26dCk3FNl5T0vi5R_OeYS6L8sYZpxv_42OG-MYla0cfv7mFsGhcRi37UbO3UZKWDJCrQ?testcase_id=6069905155948544

Issue manually filed by: mummareddy

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 
Components: Internals>Skia
Labels: M-54 Findit-for-crash Te-Logged
Owner: caryclark@chromium.org
Status: Assigned (was: Untriaged)

Author: caryclark
Project: chromium-skia
Changelist: https://chromium.googlesource.com/skia.git/+/55888e44171ffd48b591d19256884a969fe4da17
Time: Mon Jul 18 17:01:36 2016
Lines 508-515 of file SkAddIntersections.cpp which potentially caused crash are changed in this cl (frame #6, "AddIntersectTs").
Minimum distance from crash line to modified line: 0. (file: SkAddIntersections.cpp, crashed on: 512, modified: 512).

Project Member

Comment 3 by bugdroid1@chromium.org, Aug 16 2016

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/99b207c94f0b9697465f1249d05e1f89660ceb95

commit 99b207c94f0b9697465f1249d05e1f89660ceb95
Author: skia-deps-roller <skia-deps-roller@chromium.org>
Date: Tue Aug 16 21:32:54 2016

Roll src/third_party/skia/ af68fa11e..8fd23a86d (10 commits).

https://chromium.googlesource.com/skia.git/+log/af68fa11ed61..8fd23a86d0d1

$ git log af68fa11e..8fd23a86d --date=short --no-merges --format='%ad %ae %s'
2016-08-16 bungeman Remove SkPreprocessorSeq.h and SkTypedEnum.h.
2016-08-16 halcanary SkPDF: Font names need escaping
2016-08-16 halcanary SkPDF: eliminate SkPDFCIDfont class
2016-08-16 caryclark fix fuzz bug
2016-08-16 halcanary SkPDF:  SkPDFFont class changes
2016-08-16 mtklein SkLiteDL: remove freelisting, add reset() and SKLITEDL_PAGE knob.
2016-08-16 mtklein GN: add extra_cflags et al.
2016-08-16 msarett Add onDrawBitmapLattice(), avoid unnecessary bitmap->image copy
2016-08-16 robertphillips Update ComputeBlurredRRectParams to compute all the parameters needed for occluded blurred rrect ninepatch draws
2016-08-16 mtklein 32-bit fast hash, tidy up murmur3 a bit

BUG= 637968 , 638002 

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

Review-Url: https://codereview.chromium.org/2245373004
Cr-Commit-Position: refs/heads/master@{#412342}

[modify] https://crrev.com/99b207c94f0b9697465f1249d05e1f89660ceb95/DEPS

Project Member

Comment 4 by ClusterFuzz, Aug 17 2016

ClusterFuzz has detected this issue as fixed in range 412260:412422.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6069905155948544

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000080
Crash State:
  oppT
  findOppT
  SkTSect<SkDCubic, SkDConic>::extractCoincident
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=405990:406128
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=412260:412422

Minimized Testcase (0.42 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95Jb1EHvhh0fsdN5HXSyONLZGeO1ncUJZR0TSN8hQqFfcct8poZTpQZMHxnxZ1O_I7dreORTBWzoIDWrYSrBcrtnL26dCk3FNl5T0vi5R_OeYS6L8sYZpxv_42OG-MYla0cfv7mFsGhcRi37UbO3UZKWDJCrQ?testcase_id=6069905155948544

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.
Project Member

Comment 5 by ClusterFuzz, Aug 17 2016

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase is verified as fixed, closing issue.

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

Comment 6 by sheriffbot@chromium.org, Nov 22 2016

Labels: -Restrict-View-EditIssue
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

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