https://bugs.llvm.org/show_bug.cgi?id=33091
Bug ID: 33091
Summary: null pointer dereference in libfuzzer?
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: agostino.saru...@gmail.com
CC: llvm-bugs@lists.llvm.org
Created attachment 18466
--> https://bugs.llvm.org/attachment.cgi?id=18466&action=edit
stacktrace1
This is the first time I tried to use libfuzzer, I'd like to understand if I
did something bad on my side.
I downloaded this:
https://github.com/google/oss-fuzz/blob/master/projects/curl/curl_fuzzer.cc
I compiled it with:
clang++ -g3 -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard
curl_fuzzer.cc -lcurl /usr/lib64/libFuzzer.a -o curl_libfuzzer
while I launch ./curl_libfuzzer I get (see stacktrace1):
==19775==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000000000 bp 0x000000000000 sp 0x7ffe82b616b8 T0)
after that I tried to do the same thing with libfuzzer compiled with
asan/ubsan,
I get more info but the same result (see stacktrace2).
I have clang 4.0.0 and libfuzzer 3.9.1
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