[llvm-bugs] Issue 10094 in oss-fuzz: llvm/llvm-opt-fuzzer--x86_64-instcombine: Heap-use-after-free in llvm::Value::assertModuleIsMaterializedImpl

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #3 on issue 10094 by ClusterFuzz-External:  
llvm/llvm-opt-fuzzer--x86_64-instcombine: Heap-use-after-free in  
llvm::Value::assertModuleIsMaterializedImpl
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10094#c3

ClusterFuzz has detected this issue as fixed in range  
201810110229:201810120229.

Detailed report: https://oss-fuzz.com/testcase?key=5722313073360896

Project: llvm
Fuzzer: libFuzzer_llvm_llvm-opt-fuzzer--x86_64-instcombine
Fuzz target binary: llvm-opt-fuzzer--x86_64-instcombine
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Heap-use-after-free READ 1
Crash Address: 0x60c000000b00
Crash State:
   llvm::Value::assertModuleIsMaterializedImpl
   llvm::isInstructionTriviallyDead
   llvm::InstCombiner::run

Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201808271555:201808280130
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201810110229:201810120229

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5722313073360896

See https://github.com/google/oss-fuzz/blob/master/docs/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.

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