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PyUnicode_DecodeUTF8Stateful() does not set *consumed for ASCII-only string #99612

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serhiy-storchaka opened this issue Nov 20, 2022 · 2 comments
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PyUnicode_DecodeUTF8Stateful() does not set *consumed for ASCII-only string #99612

serhiy-storchaka opened this issue Nov 20, 2022 · 2 comments
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3.9 only security fixes 3.10 only security fixes release-blocker topic-C-API topic-unicode type-bug An unexpected behavior, bug, or error

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@serhiy-storchaka
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serhiy-storchaka commented Nov 20, 2022 •
edited by bedevere-bot
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PyUnicode_DecodeUTF8Stateful() should save the number of successfully decoded bytes in *consumed. But if all bytes are in the ASCII range, it uses a fast path and does not set *consumed.

It was found during writing coverage tests for Unicode C API (#99593).

Linked PRs
@serhiy-storchaka serhiy-storchaka added type-bug An unexpected behavior, bug, or error topic-unicode 3.11 only security fixes 3.10 only security fixes topic-C-API 3.12 bugs and security fixes labels Nov 20, 2022
serhiy-storchaka added a commit to serhiy-storchaka/cpython that referenced this issue Nov 20, 2022
@serhiy-storchaka
pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only data
8ff13de 
Previously *consumed was not set in this case.
@bedevere-bot bedevere-bot mentioned this issue Nov 20, 2022
Merged
serhiy-storchaka added a commit that referenced this issue Dec 1, 2022
@serhiy-storchaka
gh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only data (GH-…
f08e52c 
…99613)

Previously *consumed was not set in this case.
carljm added a commit to carljm/cpython that referenced this issue Dec 1, 2022
@carljm
Merge branch 'main' into fixinspect
12f7659 
* main: (112 commits)
  pythongh-99894: Ensure the local names don't collide with the test file in traceback suggestion error checking (python#99895)
  pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only data (pythonGH-99613)
  Doc: Add summary line to isolation_level & autocommit sqlite3.connect params (python#99917)
  pythonGH-98906 ```re``` module: ```search() vs. match()``` section should mention ```fullmatch()``` (pythonGH-98916)
  pythongh-89189: More compact range iterator (pythonGH-27986)
  bpo-47220: Document the optional callback parameter of weakref.WeakMethod (pythonGH-25491)
  pythonGH-99905: Fix output of misses in summarize_stats.py execution counts (pythonGH-99906)
  pythongh-99845: PEP 670: Convert PyObject macros to functions (python#99850)
  pythongh-99845: Use size_t type in __sizeof__() methods (python#99846)
  pythonGH-99877)
  Fix typo in exception message in `multiprocessing.pool` (python#99900)
  pythongh-87092: move all localsplus preparation into separate function called from assembler stage (pythonGH-99869)
  pythongh-99891: Fix infinite recursion in the tokenizer when showing warnings (pythonGH-99893)
  pythongh-99824: Document that sqlite3.connect implicitly open a transaction if autocommit=False (python#99825)
  pythonGH-81057: remove static state from suggestions.c (python#99411)
  Improve zip64 limit error message (python#95892)
  pythongh-98253: Break potential reference cycles in external code worsened by typing.py lru_cache (python#98591)
  pythongh-99127: Allow some features of syslog to the main interpreter only (pythongh-99128)
  pythongh-82836: fix private network check (python#97733)
  Docs: improve accuracy of socketserver reference (python#24767)
  ...
serhiy-storchaka added a commit to serhiy-storchaka/cpython that referenced this issue Jul 25, 2023
@serhiy-storchaka
[3.11] pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-o…
c1d4f11 
…nly data (pythonGH-99613)

Previously *consumed was not set in this case..
(cherry picked from commit f08e52c)

Co-authored-by: Serhiy Storchaka <[email protected]>
@bedevere-bot bedevere-bot mentioned this issue Jul 25, 2023
Merged
@serhiy-storchaka serhiy-storchaka added 3.9 only security fixes 3.8 (EOL) end of life release-blocker labels Jul 25, 2023
@serhiy-storchaka
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Since this is a bug in the C API, I consider it as a security level fix.

serhiy-storchaka added a commit that referenced this issue Jul 25, 2023
@serhiy-storchaka
[3.11] gh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only da…
b8b3e6a 
…ta (GH-99613) (GH-107224)

Previously *consumed was not set in this case.
(cherry picked from commit f08e52c)
@bedevere-bot bedevere-bot mentioned this issue Jul 25, 2023
Merged
miss-islington pushed a commit to miss-islington/cpython that referenced this issue Jul 25, 2023
@serhiy-storchaka @miss-islington
[3.11] pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-o…
5b13e86 
…nly data (pythonGH-99613) (pythonGH-107224)

(cherry picked from commit b8b3e6a)

Co-authored-by: Serhiy Storchaka <[email protected]>
Previously *consumed was not set in this case.
(cherry picked from commit f08e52c)
@bedevere-bot bedevere-bot mentioned this issue Jul 25, 2023
Merged
serhiy-storchaka added a commit to serhiy-storchaka/cpython that referenced this issue Jul 25, 2023
@serhiy-storchaka
[3.9] [3.11] pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for A…
f72f15d 
…SCII-only data (pythonGH-99613) (pythonGH-107224)

Previously *consumed was not set in this case.
(cherry picked from commit f08e52c).
(cherry picked from commit b8b3e6a)

Co-authored-by: Serhiy Storchaka <[email protected]>
@gpshead gpshead removed 3.11 only security fixes 3.12 bugs and security fixes labels Jul 26, 2023
ambv pushed a commit that referenced this issue Aug 22, 2023
@miss-islington @serhiy-storchaka
[3.10] gh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only da…
1c937e5 
…ta (GH-99613) (GH-107224) (#107230)

Previously *consumed was not set in this case.

(cherry picked from commit b8b3e6a)
(cherry picked from commit f08e52c)

Co-authored-by: Serhiy Storchaka <[email protected]>
ambv pushed a commit that referenced this issue Aug 22, 2023
@serhiy-storchaka
[3.9] gh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-only data (
4a79328 
GH-99613) (GH-107224) (#107231)

Previously *consumed was not set in this case.
(cherry picked from commit f08e52c).
(cherry picked from commit b8b3e6a)
@serhiy-storchaka serhiy-storchaka removed the 3.8 (EOL) end of life label Aug 23, 2023
@serhiy-storchaka
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3.8 is not affected. The bug was introduced in 770847a (#81529).

carlosroman pushed a commit to DataDog/cpython that referenced this issue Oct 11, 2023
@serhiy-storchaka @carlosroman
[3.9] pythongh-99612: Fix PyUnicode_DecodeUTF8Stateful() for ASCII-on…
0bd646a 
…ly data (pythonGH-99613) (pythonGH-107224) (python#107231)

Previously *consumed was not set in this case.
(cherry picked from commit f08e52c).
(cherry picked from commit b8b3e6a)
netbsd-srcmastr referenced this issue in NetBSD/pkgsrc Feb 20, 2024
py-cbor2: updated to 5.6.2
f2ebf29 
5.6.2

- Fixed ``__hash__()`` of the C version of the ``CBORTag`` type crashing when there's a recursive
  reference cycle
- Fixed type annotation for the file object in ``cbor2.dump()``, ``cbor2.load()``, ``CBOREncoder``
  and ``CBORDecoder`` to be ``IO[bytes]`` instead of ``BytesIO``
- Worked around a `CPython bug <https://github.com/python/cpython/issues/99612>`_ that caused
  a ``SystemError`` to be raised, or even a buffer overflow to occur when decoding a long text
  string that contained only ASCII characters
- Changed the return type annotations of ``cbor2.load()`` and ``cbor2.load()`` to return ``Any``
  instead of ``object`` so as not to force users to make type casts
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