skia/image_filter_deserialize_width: Use-of-uninitialized-value in SkBaseShadowTessellator::stitchConcaveRings

2019-02-26T07:36:09
ID OSSFUZZ-13417
Type ossfuzz
Reporter Google
Modified 2019-04-06T15:24:27

Description

Project: https://skia.googlesource.com/skia.git

Detailed report: https://oss-fuzz.com/testcase?key=5686966203449344

Project: skia Fuzzer: libFuzzer_skia_image_filter_deserialize_width Fuzz target binary: image_filter_deserialize_width Job Type: libfuzzer_msan_skia Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: SkBaseShadowTessellator::stitchConcaveRings SkBaseShadowTessellator::computeConcaveShadow SkAmbientShadowTessellator::SkAmbientShadowTessellator

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_skia&range=201902250302:201902260303

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5686966203449344

Issue filed automatically.

See https://skia.org/dev/testing/fuzz for instructions to reproduce this bug locally.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse without an upstream patch, then the bug report will automatically become visible to the public.

When you fix this bug, please * mention the fix revision(s). * state whether the bug was a short-lived regression or an old bug in any stable releases. * add any other useful information. This information can help downstream consumers.

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