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Merged
elicn merged 2 commits into from
Apr 9, 2023
Merged

Improve afl_fuzz wrapper #1330

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7bb766b
Improve afl_fuzz wrapper
kiddo-pwn Mar 29, 2023
2d73e00
Update fuzzing sample due to changes in fuzz wrapper
kiddo-pwn Mar 30, 2023
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5 changes: 1 addition & 4 deletions examples/fuzzing/stm32f429/fuzz.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,10 +42,7 @@ def fuzzing_callback(ql: Qiling):

return UC_ERR_OK

ql.uc.ctl_exits_enabled(True)
ql.uc.ctl_set_exits([0x80006d9])

ql_afl_fuzz_custom(ql, input_file, place_input_callback, fuzzing_callback=fuzzing_callback)
ql_afl_fuzz_custom(ql, input_file, place_input_callback, fuzzing_callback=fuzzing_callback, exits=[0x80006d9])

os.exit(0)

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9 changes: 5 additions & 4 deletions qiling/extensions/afl/afl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,9 +28,6 @@ def ql_afl_fuzz(ql: Qiling,
:raises UcAflError: If something wrong happens with the fuzzer.
"""

ql.uc.ctl_exits_enabled(True)
ql.uc.ctl_set_exits(exits)

def _dummy_fuzz_callback(_ql: "Qiling"):
if isinstance(_ql.arch, QlArchARM):
pc = _ql.arch.effective_pc
Expand All @@ -43,17 +40,21 @@ def _dummy_fuzz_callback(_ql: "Qiling"):

return UC_ERR_OK

return ql_afl_fuzz_custom(ql, input_file, place_input_callback, _dummy_fuzz_callback,
return ql_afl_fuzz_custom(ql, input_file, place_input_callback, _dummy_fuzz_callback, exits,
validate_crash_callback, always_validate, persistent_iters)

def ql_afl_fuzz_custom(ql: Qiling,
input_file: str,
place_input_callback: Callable[["Qiling", bytes, int], bool],
fuzzing_callback: Callable[["Qiling"], int],
exits: List[int] = [],
validate_crash_callback: Callable[["Qiling", bytes, int], bool] = None,
always_validate: bool = False,
persistent_iters: int = 1):

ql.uc.ctl_exits_enabled(True)
ql.uc.ctl_set_exits(exits)

def _ql_afl_place_input_wrapper(uc, input_bytes, iters, data):
(ql, cb, _, _) = data

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