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Issue 654328 link

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Issue metadata

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



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Crash in SkOpPtT::starter

Project Member Reported by ClusterFuzz, Oct 10 2016

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6378100369915904

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  SkOpPtT::starter
  SkOpCoincidence::addOverlap
  SkOpCoincidence::findOverlaps
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=423149:423180

Minimized Testcase (0.49 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97PRsDIAeNU86j5krYmsPqWVFjpuzJtKfcIo75JdSh8oDGle9XR_wCC1xr1k164LTPygE6OD-jAK8nLpw5K30KRBoCDTuUwkCYp9QO00n9p7qCYoiwnAHO-nX6bUJv2Osjo-EmcmS7NBeCEv7TXCqpMylh4yg?testcase_id=6378100369915904

Issue manually filed by: nyerramilli

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 
Cc: nyerramilli@chromium.org bsalomon@chromium.org
Components: Internals>Skia Tools>Test>FindIt>CorrectResult
Labels: Findit-for-crash M-56
Owner: reed@google.com
Status: Assigned (was: Untriaged)
Findit Result:
Suspected CLs	The result is a list of CLs that change the crashed files.

Author: Cary Clark
Project: chromium-skia
Changelist: https://chromium.googlesource.com/skia.git/+/e47ae2998c1cf944db5743a416583dd0f042b6d9
Time: Wed Oct 05 12:51:39 2016
Lines 316-319 of file SkPathOpsCommon.cpp which potentially caused crash are changed in this cl (frame #3, "HandleCoincidence").

Lines 855, 1205 of file SkOpCoincidence.cpp which potentially caused crash are changed in this cl (frame #1, "SkOpCoincidence::addOverlap"; frame #2, "SkOpCoincidence::findOverlaps").
Minimum distance from crash line to modified line: 0. (file: SkOpCoincidence.cpp, crashed on: 1205, modified: 1205).

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


Based on Findit results, requesting Skia team to check the issue.


Project Member

Comment 2 by ClusterFuzz, Oct 25 2016

ClusterFuzz has detected this issue as fixed in range 427050:427071.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6378100369915904

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  SkOpPtT::starter
  SkOpCoincidence::addOverlap
  SkOpCoincidence::findOverlaps
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=423149:423180
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=427050:427071

Minimized Testcase (0.49 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97PRsDIAeNU86j5krYmsPqWVFjpuzJtKfcIo75JdSh8oDGle9XR_wCC1xr1k164LTPygE6OD-jAK8nLpw5K30KRBoCDTuUwkCYp9QO00n9p7qCYoiwnAHO-nX6bUJv2Osjo-EmcmS7NBeCEv7TXCqpMylh4yg?testcase_id=6378100369915904

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 3 by ClusterFuzz, Oct 25 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 4 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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