[llvm-bugs] Issue 4588 in oss-fuzz: llvm/clang-fuzzer: Stack-buffer-overflow in clang::expandUCNs

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #6 on issue 4588 by ClusterFuzz-External: llvm/clang-fuzzer:  
Stack-buffer-overflow in clang::expandUCNs
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4588#c6

ClusterFuzz has detected this issue as fixed in range  
201802060728:201802070205.

Detailed report: https://oss-fuzz.com/testcase?key=5041559499177984

Project: llvm
Fuzzer: libFuzzer_llvm_clang-fuzzer
Fuzz target binary: clang-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Stack-buffer-overflow READ 1
Crash Address: 0x7fcbded34038
Crash State:
   clang::expandUCNs
   clang::NumericLiteralParser::NumericLiteralParser
   clang::Sema::ActOnNumericConstant

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201712090607:201712100011
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201802060728:201802070205

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5041559499177984

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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