[llvm-bugs] Issue 19782 in oss-fuzz: llvm:clangd-fuzzer: Crash in clang::serialization::reader::HeaderFileInfoTrait::ReadData

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com,  
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer  
Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-Medium  
Reported-2020-01-03
Type: Bug-Security

New issue 19782 by ClusterFuzz-External: llvm:clangd-fuzzer: Crash in  
clang::serialization::reader::HeaderFileInfoTrait::ReadData
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19782

Detailed Report: https://oss-fuzz.com/testcase?key=5194868125335552

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: clangd-fuzzer
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x7fe69ffbbfbf
Crash State:
   clang::serialization::reader::HeaderFileInfoTrait::ReadData
   bool llvm::function_ref<bool
   clang::serialization::ModuleManager::visit

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201906300300:201910150335

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5194868125335552

Issue filed automatically.

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