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Issue metadata

Status: Verified
Owner: ----
Closed: Sep 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Crash in lineTo

Project Member Reported by ClusterFuzz, Sep 15 2016

Issue description

Components: Internals>Skia
Labels: Findit-for-crash M-55 Te-Logged
Status: Assigned (was: Untriaged)

Author: caryclark
Project: chromium-skia
Changelist: https://chromium.googlesource.com/skia.git/+/eed356d281adbf93ecbd89cb23913a7861cd8578
Time: Wed Sep 14 14:18:20 2016
Lines 84, 116 of file SkPathWriter.cpp which potentially caused crash are changed in this cl (frame #1, "lineTo"; frame #2, "SkPathWriter::finishContour").

Lines 155, 178, 330 of file SkPathOpsOp.cpp which potentially caused crash are changed in this cl (frame #3, "bridgeOp"; frame #4, "OpDebug").

File SkOpBuilder.cpp is changed in this cl (and is part of stack frame #5, "SkOpBuilder::resolve")
Minimum distance from crash line to modified line: 0. (file: SkPathWriter.cpp, crashed on: 83, modified: 83).

Suspected Project: chromium-skia
Suspected Component: Internals>Skia
Project Member

Comment 2 by ClusterFuzz, Sep 18 2016

Labels: Stability-AFL
Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5542260920025088

Fuzzer: afl_skia_pathop_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000008
Crash State:
  SkPathWriter::finishContour
  OpDebug
  SkOpBuilder::resolve
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=418554:418622

Minimized Testcase (0.32 Kb): https://cluster-fuzz.appspot.com/download/AMIfv96wx126raRLCBmNtoe2Sr_0Aru-JzFfZbnL6JyEhB41qg32DwTUpCLeV9StAkmxdi2-x7RYpmIGNvLANWutY3YQPz9aiiABwedOV6UBYroP21dJIBgKdJL5RhYnMxAXVsnVpfh2mjTsJn-VQVqJTq9_Ly0CKQ?testcase_id=5542260920025088

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

Comment 3 by ClusterFuzz, Sep 23 2016

ClusterFuzz has detected this issue as fixed in range 420425:420578.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5542260920025088

Fuzzer: afl_skia_pathop_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000008
Crash State:
  SkPathWriter::finishContour
  OpDebug
  SkOpBuilder::resolve
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=418554:418622
Fixed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=420425:420578

Minimized Testcase (0.32 Kb): https://cluster-fuzz.appspot.com/download/AMIfv96wx126raRLCBmNtoe2Sr_0Aru-JzFfZbnL6JyEhB41qg32DwTUpCLeV9StAkmxdi2-x7RYpmIGNvLANWutY3YQPz9aiiABwedOV6UBYroP21dJIBgKdJL5RhYnMxAXVsnVpfh2mjTsJn-VQVqJTq9_Ly0CKQ?testcase_id=5542260920025088

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 4 by ClusterFuzz, Sep 24 2016

ClusterFuzz has detected this issue as fixed in range 420440:420580.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5305515175575552

Fuzzer: skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000008
Crash State:
  lineTo
  lineTo
  SkPathWriter::finishContour
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=418535:418598
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=420440:420580

Minimized Testcase (0.32 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97EgU2lg-VdgRCx6KtbT-KxzrhcW1fh6QLnB2BUvw-PHO6s9UzdYyKixXojToRVh-MT5p32XfiUCKXDlYSsYk8vVpgf_7yHm7w64myt_0EdeWg67nOhH2_LVKCQEks4-8l0mpXFiKRS0zySefW1hnoGzMNWjg?testcase_id=5305515175575552

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, Sep 24 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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