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Issue metadata

Status: WontFix
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 FixWinding

Project Member Reported by ClusterFuzz, Aug 31 2016

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4883311921201152

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x03e900001b6c
Crash State:
  FixWinding
  SkOpBuilder::resolve
  

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv95EDqfz0ef02grSHOnlO-D--aJVt2Ra_woz-MKZ4Eaznpc2FmH9IIjFhmRJxLsHJ4Z0UbeU5hHRAMQ1ZaYEySIG6UFPI3xAe43-tyVMAxagjwX_rMnmZWpvFNh9HTulTX5JaM8QonXUhSlmklaGk2nOdOephQ?testcase_id=4883311921201152


Issue manually filed by: mmoroz

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

Comment 1 by mmoroz@chromium.org, Aug 31 2016

Cc: mmoroz@chromium.org kcc@chromium.org reed@chromium.org aizatsky@chromium.org
Components: Internals>Skia
Owner: caryclark@chromium.org
Not sure if we should file bugs like this one: SkASSERT() from a debug build.

caryclark@, please let me know if we shouldn't file crashes caused by SkASSERT().
Status: WontFix (was: Untriaged)
Your intuition is correct, there's no need to file bugs that trigger an assert.

The asserts exist to help find bugs when the data is well-behaved. The asserts can be ignored when the data is random without harm.

If you wish to ignore the assert to look for more serious bugs, you can edit:
- SkASSERT(
+ SkOPASSERT(
This will skip the assert unless the data is marked as well-behaved.

Comment 3 by mmoroz@chromium.org, Aug 31 2016

That makes sense, thanks for quick response!
Project Member

Comment 4 by ClusterFuzz, Sep 23 2016

ClusterFuzz has detected this issue as fixed in range 420262:420312.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4883311921201152

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x03e900001b6c
Crash State:
  FixWinding
  SkOpBuilder::resolve
  
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=420262:420312

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv95EDqfz0ef02grSHOnlO-D--aJVt2Ra_woz-MKZ4Eaznpc2FmH9IIjFhmRJxLsHJ4Z0UbeU5hHRAMQ1ZaYEySIG6UFPI3xAe43-tyVMAxagjwX_rMnmZWpvFNh9HTulTX5JaM8QonXUhSlmklaGk2nOdOephQ?testcase_id=4883311921201152


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.
It's likely that this was fixed with the edit mentioned in #2 was made to help find a different fuzzer crash. However, this may fail again in the future by triggering a newly written assert.
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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