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[fuzzer] Weird input with continuation and newlines causes null deref in parser #89571

Description

@ammaraskar
BPO 45408
Nosy @gpshead, @ambv, @ammaraskar, @lysnikolaou, @pablogsal, @isidentical
PRs
  • bpo-45408: Don't override previous tokenizer errors in the second parser pass #28812
  • [3.10] bpo-45408: Don't override previous tokenizer errors in the second parser pass #28813
  • Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
    closed_at = <Date 2021-10-07.23:50:22.415>
    created_at = <Date 2021-10-07.18:00:19.433>
    labels = ['interpreter-core', 'release-blocker', '3.10', 'type-crash', '3.11']
    title = '[fuzzer] Weird input with continuation and newlines causes null deref in parser'
    updated_at = <Date 2021-10-07.23:50:22.415>
    user = 'https://github.com/ammaraskar'

    bugs.python.org fields:

    activity = <Date 2021-10-07.23:50:22.415>
    actor = 'pablogsal'
    assignee = 'none'
    closed = True
    closed_date = <Date 2021-10-07.23:50:22.415>
    closer = 'pablogsal'
    components = ['Parser']
    creation = <Date 2021-10-07.18:00:19.433>
    creator = 'ammar2'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 45408
    keywords = ['patch']
    message_count = 6.0
    messages = ['403427', '403429', '403439', '403441', '403444', '403449']
    nosy_count = 6.0
    nosy_names = ['gregory.p.smith', 'lukasz.langa', 'ammar2', 'lys.nikolaou', 'pablogsal', 'BTaskaya']
    pr_nums = ['28812', '28813']
    priority = 'release blocker'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'crash'
    url = 'https://bugs.python.org/issue45408'
    versions = ['Python 3.10', 'Python 3.11']

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      3.10only security fixes3.11only security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)release-blockertype-crashA hard crash of the interpreter, possibly with a core dump

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