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minor NULL pointer and sign issues reported by Coverity #85228

@gpshead

Description

@gpshead
BPO 41056
Nosy @gpshead, @tiran, @pganssle, @miss-islington
PRs
  • bpo-41056: Fix a possible MemoryError leak within zoneinfo. #21007
  • bpo-41056: Fix a NULL pointer dereference on MemoryError within the ssl module. #21009
  • bpo-41056: Use the fildes converter for fd to please Coverity. #21011
  • bpo-41056: Fix reference to deallocated stack in pathconfig (Coverity) #21013
  • [3.9] bpo-41056: Fix a NULL pointer dereference on MemoryError within the ssl module. (GH-21009) #21014
  • [3.8] bpo-41056: Fix a NULL pointer dereference on MemoryError within the ssl module. (GH-21009) #21015
  • [3.9] bpo-41056: Fix reference to deallocated stack in pathconfig (Coverity) (GH-21013) #21039
  • [3.8] bpo-41056: Fix reference to deallocated stack in pathconfig (Coverity) (GH-21013) #21041
  • [3.9] bpo-41056: Fix a possible MemoryError leak within zoneinfo. (GH-21007) #21083
  • 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 = 'https://github.com/gpshead'
    closed_at = <Date 2020-10-21.19:52:52.359>
    created_at = <Date 2020-06-20.17:38:30.744>
    labels = ['3.10', '3.8', '3.9', 'type-crash']
    title = 'minor NULL pointer and sign issues reported by Coverity'
    updated_at = <Date 2020-10-21.19:52:52.358>
    user = 'https://github.com/gpshead'

    bugs.python.org fields:

    activity = <Date 2020-10-21.19:52:52.358>
    actor = 'p-ganssle'
    assignee = 'gregory.p.smith'
    closed = True
    closed_date = <Date 2020-10-21.19:52:52.359>
    closer = 'p-ganssle'
    components = []
    creation = <Date 2020-06-20.17:38:30.744>
    creator = 'gregory.p.smith'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 41056
    keywords = ['patch']
    message_count = 12.0
    messages = ['371946', '371955', '371957', '371958', '371968', '372011', '372012', '372036', '372037', '372040', '372041', '372256']
    nosy_count = 4.0
    nosy_names = ['gregory.p.smith', 'christian.heimes', 'p-ganssle', 'miss-islington']
    pr_nums = ['21007', '21009', '21011', '21013', '21014', '21015', '21039', '21041', '21083']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'crash'
    url = 'https://bugs.python.org/issue41056'
    versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

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    3.10only security fixes3.8 (EOL)end of life3.9 (EOL)end of lifetype-crashA hard crash of the interpreter, possibly with a core dump

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