#1 0x43b271 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x43b271)
#2 0x423767 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x423767)
#3 0x429741 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x429741)
#4 0x4557a2 in main (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x4557a2)
#5 0x7ffff6a99bf6 in __libc_start_main /build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
#6 0x41db59 in _start (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x41db59)
ASAN Log
INFO: Loaded 1 modules (22 inline 8-bit counters): 22 [0x738f28, 0x738f3e),
INFO: Loaded 1 PC tables (22 PCs): 22 [0x5144a8,0x514608),
setup/fuzz.exe: Running 1 inputs 1 time(s) each.
Running: /onefuzz/31d26042-d084-40f8-88ce-7fb847fcf606/task_crashes_1/crash-301bd9ba4a615034249ab4298112a95e1bf37735
=================================================================
==4973==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000120 at pc 0x0000004fd707 bp 0x7fffffffe230 sp 0x7fffffffe228
WRITE of size 4 at 0x603000000120 thread T0
#0 0x4fd706 in LLVMFuzzerTestOneInput /home/runner/work/onefuzz/onefuzz/src/integration-tests/libfuzzer/simple.c:53:91
#1 0x43b271 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x43b271)
#2 0x423767 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x423767)
#3 0x429741 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x429741)
#4 0x4557a2 in main (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x4557a2)
#5 0x7ffff6a99bf6 in __libc_start_main /build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
#6 0x41db59 in _start (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x41db59)
0x603000000120 is located 0 bytes to the right of 32-byte region [0x603000000100,0x603000000120)
allocated by thread T0 here:
#0 0x4cd5ed in malloc (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x4cd5ed)
#1 0x4fd66f in LLVMFuzzerTestOneInput /home/runner/work/onefuzz/onefuzz/src/integration-tests/libfuzzer/simple.c:53:26
#2 0x43b271 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x43b271)
#3 0x423767 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x423767)
#4 0x429741 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x429741)
#5 0x4557a2 in main (/onefuzz/blob-containers/fuzz27ee6imdmr5gy/fuzz.exe+0x4557a2)
#6 0x7ffff6a99bf6 in __libc_start_main /build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/runner/work/onefuzz/onefuzz/src/integration-tests/libfuzzer/simple.c:53:91 in LLVMFuzzerTestOneInput
Shadow bytes around the buggy address:
0x0c067fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff8000: fa fa 00 00 00 fa fa fa 00 00 00 00 fa fa 00 00
0x0c067fff8010: 00 fa fa fa 00 00 00 00 fa fa 00 00 00 00 fa fa
=>0x0c067fff8020: 00 00 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==4973==ABORTING
Files
Repro
onefuzz --endpoint https://chkeitaonefuzz2.azurewebsites.net repro create_and_connect oft-reports-cecbd958a1f257688f9768edaaf6c94d cd9f4de6e4615f928e71cd25b846c8adb7b933eb88e61f6244059e590053fe97.json
Call Stack
ASAN Log