New issue
Advanced search Search tips

Issue 915650 link

Starred by 2 users

Issue metadata

Status: Verified
Owner:
Closed: Jan 17
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



Sign in to add a comment

Integer-overflow in SkCoverageDeltaMask::convertCoverageToAlpha

Project Member Reported by ClusterFuzz, Dec 17

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5889851976843264

Fuzzer: libFuzzer_skia_image_filter_proto_fuzzer
Fuzz target binary: skia_image_filter_proto_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  SkCoverageDeltaMask::convertCoverageToAlpha
  SkBlitter::blitCoverageDeltas
  SkScan::DAAFillPath
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=602012:602024

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5889851976843264

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for instructions to reproduce this bug locally.
 
Project Member

Comment 1 by ClusterFuzz, Dec 17

Components: Internals>Skia
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Project Member

Comment 2 by ClusterFuzz, Dec 17

Cc: metzman@chromium.org
Labels: ClusterFuzz-Auto-CC
Automatically adding ccs based on OWNERS file / target commit history.

If this is incorrect, please add ClusterFuzz-Wrong label.
Project Member

Comment 3 by ClusterFuzz, Dec 17

Labels: Test-Predator-Auto-Owner
Owner: mtkl...@google.com
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://skia.googlesource.com/skia/+/3dd116cdaa6117f95531df26c03994fe8b98e541 (SkEdgeBuilder refactoring).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Project Member

Comment 4 by ClusterFuzz, Jan 17 (5 days ago)

ClusterFuzz has detected this issue as fixed in range 623223:623224.

Detailed report: https://clusterfuzz.com/testcase?key=5889851976843264

Fuzzer: libFuzzer_skia_image_filter_proto_fuzzer
Fuzz target binary: skia_image_filter_proto_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  SkCoverageDeltaMask::convertCoverageToAlpha
  SkBlitter::blitCoverageDeltas
  SkScan::DAAFillPath
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=602012:602024
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=623223:623224

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5889851976843264

See https://github.com/google/clusterfuzz-tools for instructions to reproduce this bug locally.

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, Jan 17 (5 days ago)

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5889851976843264 is verified as fixed, so closing issue as verified.

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

Sign in to add a comment