[llvm-bugs] Issue 16680 in oss-fuzz: llvm:clang-fuzzer: Null-dereference READ in llvm::detail::IEEEFloat::roundSignificandWithExponent

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com,  
igm... at gmail.com, mitchp at google.com, bigchees... at gmail.com,  
eneyman at google.com, llvm-b... at lists.llvm.org, jfb at chromium.org,  
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer  
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-08-23
Type: Bug

New issue 16680 by ClusterFuzz-External: llvm:clang-fuzzer:  
Null-dereference READ in  
llvm::detail::IEEEFloat::roundSignificandWithExponent
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16680

Detailed Report: https://oss-fuzz.com/testcase?key=5663533739540480

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

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
   llvm::detail::IEEEFloat::roundSignificandWithExponent
   llvm::detail::IEEEFloat::convertFromDecimalString
   llvm::detail::IEEEFloat::convertFromString

Sanitizer: memory (MSAN)

Crash Revision:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&revision=201906300300

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5663533739540480

Issue filed automatically.

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

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