[3.7] bpo-25862: Fix several bugs in the _io module. (GH-8026) by miss-islington · Pull Request #8028

[3.7] bpo-25862: Fix several bugs in the _io module. (GH-8026) by miss-islington · Pull Request #8028 · python/cpython

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miss-islington merged 1 commit intopython:3.7from

miss-islington:backport-fdb5a50-3.7

Jun 30, 2018

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[3.7] bpo-25862: Fix several bugs in the _io module. (GH-8026)#8028
miss-islington merged 1 commit intopython:3.7from
miss-islington:backport-fdb5a50-3.7

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miss-islington commented
Jun 30, 2018
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edited by bedevere-bot

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They can be exposed when some C API calls fail due to lack of
memory.

Failed Py_BuildValue() could cause an assertion error in the
following TextIOWrapper.tell().
input_chunk could be decrefed twice in TextIOWrapper.seek()
after failed Py_BuildValue().
initvalue could leak in StringIO.getstate() after failed
PyDict_Copy().
(cherry picked from commit fdb5a50)

Co-authored-by: Serhiy Storchaka storchaka@gmail.com

https://bugs.python.org/issue25862

bpo-25862: Fix several bugs in the _io module. (pythonGH-8026)

13a31f5

They can be exposed when some C API calls fail due to lack of
memory.

* Failed Py_BuildValue() could cause an assertion error in the
  following TextIOWrapper.tell().
* input_chunk could be decrefed twice in TextIOWrapper.seek()
  after failed Py_BuildValue().
* initvalue could leak in StringIO.__getstate__() after failed
  PyDict_Copy().
(cherry picked from commit fdb5a50)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bedevere-bot added skip news type-bug