imagemagick:encoder_dxt1_fuzzer: Use-of-uninitialized-value in PerceptibleReciprocal

2020-01-30T12:02:53
ID OSSFUZZ-20438
Type ossfuzz
Reporter Google
Modified 2020-02-29T19:59:26

Description

Project: https://github.com/imagemagick/imagemagick.git

Detailed Report: https://oss-fuzz.com/testcase?key=5070329724796928

Project: imagemagick Fuzzing Engine: libFuzzer Fuzz Target: encoder_dxt1_fuzzer Job Type: libfuzzer_msan_imagemagick Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: PerceptibleReciprocal VerticalFilter ResizeImage

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_imagemagick&range=202001280426:202001290430

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5070329724796928

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally. 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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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.