keystone:fuzz_asm_arm_arm: Use-of-uninitialized-value in llvm_ks::MCAssembler::computeFragmentSize

2020-05-26T07:32:08
ID OSSFUZZ-22482
Type ossfuzz
Reporter Google
Modified 2020-11-09T16:47:39

Description

Detailed Report: https://oss-fuzz.com/testcase?key=5659471866232832

Project: keystone Fuzzing Engine: libFuzzer Fuzz Target: fuzz_asm_arm_arm Job Type: libfuzzer_msan_keystone Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: llvm_ks::MCAssembler::computeFragmentSize llvm_ks::MCAsmLayout::layoutFragment llvm_ks::MCAsmLayout::ensureValid

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_keystone&range=201911200413:201911222344

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5659471866232832

Issue filed automatically.

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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.