https://llvm.org/bugs/show_bug.cgi?id=28890
Bug ID: 28890
Summary: libFuzzer 3.8 fails with "illegal hardware
instruction"
Product: new-bugs
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: sylves...@debian.org
CC: jack.ll...@gmail.com, llvm-bugs@lists.llvm.org,
vonos...@gmail.com
Depends on: 25991
Classification: Unclassified
Trying the example with llvm 3.8:
http://llvm.org/docs/LibFuzzer.html
$ apt-get install libfuzzer-3.8-dev clang-3.8
[..]
$ cat << EOF > test_fuzzer.cc
#include <stdint.h>
#include <stddef.h>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (size > 0 && data[0] == 'H')
if (size > 1 && data[1] == 'I')
if (size > 2 && data[2] == '!')
__builtin_trap();
return 0;
}
EOF
$ clang++-3.8 -fsanitize=address -fsanitize-coverage=edge test_fuzzer.cc
/usr/lib/llvm-3.8/lib/libFuzzer.a
$ ./a.out
Seed: 2980367726
PreferSmall: 1
#0 READ units: 1 exec/s: 0
#1 INITED cov: 2 units: 1 exec/s: 0
#2 NEW cov: 3 units: 2 exec/s: 0 L: 64 MS: 0
#657 NEW cov: 4 units: 3 exec/s: 0 L: 64 MS: 0
#1070 NEW cov: 5 units: 4 exec/s: 0 L: 1 MS: 4
ShuffleBytes-ChangeByte-EraseByte-CrossOver-
#4893 NEW cov: 6 units: 5 exec/s: 0 L: 2 MS: 2 CrossOver-ChangeBit-
#5577 NEW cov: 7 units: 6 exec/s: 0 L: 50 MS: 1 CrossOver-
zsh: illegal hardware instruction ./a.out
reported here:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833563
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