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#!/usr/bin/env python
# SPDX-License-Identifier: MIT
# Copyright 2021 Even Rouault
# Analyze git log for ossfuzz vulnerabilities
from subprocess import check_output
out = check_output("git log --no-merges --pretty=oneline".split(" ")).decode("utf-8")
result = list(filter(lambda x: "chromium" in x, out.splitlines()))
categories = {}
def add_occurence(category_id):
if category_id in categories:
categories[category_id] += 1
else:
categories[category_id] = 1
for line in result:
pos = line.find(" ")
commit_id = line[0:pos]
# Normalize
msg = line[pos + 1 :].lower()
msg = msg.replace("-", " ")
# Fix a few typos
msg = msg.replace("oveflow", "overflow")
msg = msg.replace("overfow", "overflow")
msg = msg.replace("divison", "division")
msg = msg.replace("divizion", "division")
msg = msg.replace("divid", "division")
msg = msg.replace("use of initialized", "uninitialized")
msg = msg.replace("out of bond", "out of bound")
msg = msg.replace("procession", "processing")
msg = msg.replace("behaviour", "behavior")
msg = msg.replace("perforance", "performance")
# print(commit_id, msg)
if (
"overflow" in msg
or "out of bound" in msg
or "out of buffer" in msg
or "stack buffer" in msg
):
if "stack" in msg:
if "read" in msg:
add_occurence("stack_buffer_overflow_read")
elif "read" in msg:
add_occurence("stack_buffer_overflow_write")
elif "buffer" in msg:
add_occurence("stack_buffer_overflow_unspecified")
else:
add_occurence("stack_call_overflow")
elif (
"integer" in msg
or "int32" in msg
or "int64 " in msg
or "int " in msg
or "size_t" in msg
or "unsigned" in msg
):
if "unsigned" in msg or "size_t" in msg:
if "harmless" in msg:
add_occurence("integer_overflow_unsigned_harmless")
else:
add_occurence("integer_overflow_unsigned")
else:
if "harmless" in msg:
add_occurence(
"integer_overflow_harmless"
) # one occurrence due to atoi()
else:
add_occurence("integer_overflow_signed")
elif (
"out of bound" in msg
or "heap" in msg
or "buffer" in msg
or "container overflow" in msg
or "array" in msg
or "read overflow" in msg
):
if "read " in msg:
add_occurence("heap_buffer_overflow_read")
elif "write " in msg:
add_occurence("heap_buffer_overflow_write")
else:
add_occurence("buffer_overflow_unspecified")
else:
assert False, (commit_id, msg)
elif "unsigned integer underflow" in msg:
add_occurence("unsigned_integer_underflow")
elif (
"oom" in msg
or "allocate" in msg
or (
(
"excessive" in msg
or "too large" in msg
or "too much"
or "huge" in msg
or "big" in msg
)
and ("memory" in msg or "ram" in msg or "allocation" in msg)
)
):
add_occurence("excessive_memory_use")
elif "shift" in msg:
if "left" in msg:
add_occurence("invalid_shift_left")
elif "right" in msg:
add_occurence("invalid_shift_right")
else:
add_occurence("invalid_shift_unspecified_dir")
elif "division" in msg:
assert "zero" in msg
if "float" in msg or "harmless" in msg:
if "harmless" in msg:
add_occurence("division_by_zero_floating_point_harmless")
else:
add_occurence("division_by_zero_floating_point_unknown_consequence")
else:
add_occurence("division_by_zero_integer")
elif "leak" in msg:
if "error" in msg or "corrupted" in msg:
add_occurence("memory_leak_error_code_path")
else:
add_occurence("memory_leak_unspecified")
elif "unhandled exception" in msg or "avoid exception" in msg:
add_occurence("unhandled_exception")
elif (
"null pointer" in msg
or "null ptr" in msg
or "nullptr" in msg
or "nullpointer" in msg
or "null deref" in msg
or "against null" in msg
):
add_occurence("null_pointer_dereference")
elif "reference" in msg:
add_occurence("invalid_memory_dereference")
elif "infinite" in msg and "loop" in msg:
add_occurence("infinite_loop")
elif "double free" in msg:
add_occurence("double_free")
elif "use after free" in msg:
add_occurence("use_after_free")
elif "uninitialized" in msg:
add_occurence("uninitialized_variable")
elif "assert" in msg:
add_occurence("assertion")
elif (
"exponential" in msg
or "limit number" in msg
or "speed up" in msg
or "timeout" in msg
or "too long" in msg
or (
("limit" in msg or "long" in msg or "large" in msg or "slow" in msg)
and (
"loop" in msg or "delay" in msg or "time" in msg or "processing" in msg
)
)
or ("excessive" in msg and "time" in msg)
or "performance" in msg
or "big processing time" in msg
):
add_occurence("excessive_processing_time")
elif (
"recursion" in msg
or "recursive" in msg
or "deep call" in msg
or "cyclic call" in msg
):
add_occurence("stack_call_overflow")
elif "invalid enum" in msg:
add_occurence("invalid_enum")
elif "cast" in msg:
add_occurence("invalid_cast")
elif "negative size" in msg:
add_occurence("negative_size_allocation")
elif "crash" in msg:
add_occurence("unspecified_crash")
elif "ubsan" in msg or "unspecified behavior" in msg:
add_occurence("undefined_behavior_unspecified")
else:
add_occurence("other_issue")
ar = []
for k, v in categories.items():
ar.append((k, v))
ar.sort(key=lambda x: x[1], reverse=True)
total = sum(v for k, v in ar)
print("%-55s %4s %4s" % ("Category", "Count", "Pct"))
print("-" * 70)
for k, v in ar:
print("%-55s %4d %5.02f %%" % (k, v, 100.0 * v / total))
print("-" * 70)
print("%-55s %4d" % ("Total", total))
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