gh-116447: Fix possible UB in `arraymodule` and `getargs` (GH-116459)
(cherry picked from commit fdb2d90a27)
Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
Allow controlling Expat >=2.6.0 reparse deferral (CVE-2023-52425) by adding five new methods:
- `xml.etree.ElementTree.XMLParser.flush`
- `xml.etree.ElementTree.XMLPullParser.flush`
- `xml.parsers.expat.xmlparser.GetReparseDeferralEnabled`
- `xml.parsers.expat.xmlparser.SetReparseDeferralEnabled`
- `xml.sax.expatreader.ExpatParser.flush`
Based on the "flush" idea from #115138 (comment) .
- Please treat as a security fix related to CVE-2023-52425.
(cherry picked from commit 6a95676)
(cherry picked from commit 73807eb)
(cherry picked from commit eda2963)
---------
Includes code suggested-by: Snild Dolkow <snild@sony.com>
and by core dev Serhiy Storchaka.
Co-authored-by: Gregory P. Smith <greg@krypto.org>
shm_open() and shm_unlink() now check for embedded null characters in
the name and raise an error instead of silently truncating it.
(cherry picked from commit 79811ededd)
(cherry picked from commit 5ea86f496a)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
csv.writer() now quotes empty fields if delimiter is a space and
skipinitialspace is true and raises exception if quoting is not possible.
(cherry picked from commit 937d282150)
gh-114572: Fix locking in cert_store_stats and get_ca_certs (GH-114573)
* gh-114572: Fix locking in cert_store_stats and get_ca_certs
cert_store_stats and get_ca_certs query the SSLContext's X509_STORE with
X509_STORE_get0_objects, but reading the result requires a lock. See
https://github.com/openssl/openssl/pull/23224 for details.
Instead, use X509_STORE_get1_objects, newly added in that PR.
X509_STORE_get1_objects does not exist in current OpenSSLs, but we can
polyfill it with X509_STORE_lock and X509_STORE_unlock.
* Work around const-correctness problem
* Add missing X509_STORE_get1_objects failure check
* Add blurb
(cherry picked from commit bce693111b)
Co-authored-by: David Benjamin <davidben@google.com>
lseek() always returns 0 for character pseudo-devices like
`/dev/urandom` (for other non-regular files, e.g. `/dev/stdin`, it
always returns -1, to which CPython reacts by raising appropriate
exceptions). They are thus technically seekable despite not having seek
semantics.
When calling read() on e.g. an instance of `io.BufferedReader` that
wraps such a file, `BufferedReader` reads ahead, filling its buffer,
creating a discrepancy between the number of bytes read and the internal
`tell()` always returning 0, which previously resulted in e.g.
`BufferedReader.tell()` or `BufferedReader.seek()` being able to return
positions < 0 even though these are supposed to be always >= 0.
Invariably keep the return value non-negative by returning
max(former_return_value, 0) instead, and add some corresponding tests.
(cherry picked from commit 26800cf25a)
Co-authored-by: 6t8k <58048945+6t8k@users.noreply.github.com>
Immediate merits:
* eliminate complex workarounds for 'z' format support
(NOTE: mpdecimal recently added 'z' support, so this becomes
efficient in the long term.)
* fix 'z' format memory leak
* fix 'z' format applied to 'F'
* fix missing 'GH-' format support
Suggested and prototyped by Stefan Krah.
Fixes gh-114563, gh-91060
(cherry picked from commit 72340d15cd)
(cherry picked from commit 09c98e4633)
Co-authored-by: Stefan Krah <skrah@bytereef.org>
* gh-89811: Check for valid tp_version_tag in specializer (GH-113558)
* gh-113937 Fix failures in type cache tests due to re-running (GH-113953)
* Update backported code for 3.11 specifically
On Alpine Linux it could leave some field non-initialized.
(cherry picked from commit d22c066b80)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Only set filename to cwd if it was caused by failed chdir(cwd).
_fork_exec() now returns "noexec:chdir" for failed chdir(cwd).
(cherry picked from commit e2c097ebde)
Co-authored-by: Robert O'Shea <PurityLake@users.noreply.github.com>
In PyObject_GC_Del, in Py_DEBUG mode, when warning about GC objects that
were not properly untracked before starting destruction, take care to
untrack the object _before_ warning, to avoid triggering a GC run and
causing the problem the code tries to warn about. Also make sure to save and
restore any pending exceptions, which the warning would otherwise clobber or
trigger an assertion error on.
(cherry picked from commit ce6a533c4b)
Co-authored-by: T. Wouters <thomas@python.org>
(cherry picked from commit c31be58da8)
Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
io.TextIOWrapper was dropping the internal decoding buffer
during read() and write() calls.
(cherry picked from commit 73c9326563)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>
Fix the same issue of PR #112604 on PPC64LE platform
Refactor tests to make easier to add more platfroms if needed.
(cherry picked from commit 6644ca45cd)
Change-Id: I1ada30808c0d593a43eca3fa7a628c26bc276310
The length field of StgDictObject for Structure class contains now
the total number of items in ffi_type_pointer.elements (excluding
the trailing null).
The old behavior of using the number of elements in the parent class can
cause the array to be truncated when it is copied, especially when there
are multiple layers of subclassing.
(cherry picked from commit 5f3cc90a12)
Co-authored-by: Jeffrey Kintscher <49998481+websurfer5@users.noreply.github.com>
* Fix a crash when pass UINT_MAX.
* Fix an integer overflow on 64-bit non-Windows platforms.
(cherry picked from commit 0daf555c6f)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>
Set MAX_STRUCT_SIZE to 32 in stgdict.c when on Arm platforms.
This because on Arm platforms structs with at most 4 elements of any
floating point type values can be passed through registers. If the type
is double the maximum size of the struct is 32 bytes.
On x86-64 Linux, it's maximum 16 bytes hence we need to differentiate.
(cherry picked from commit bc68f4a4ab)
gh-105967: Work around a macOS bug, limit zlib C library crc32 API calls to 1gig (GH-112615)
Work around a macOS bug, limit zlib crc32 calls to 1GiB.
Without this, `zlib.crc32` and `binascii.crc32` could produce incorrect
results on multi-gigabyte inputs depending on the macOS version's Apple
supplied zlib implementation.
(cherry picked from commit 4eddb4c9d9)
Co-authored-by: Gregory P. Smith <greg@krypto.org>
gh-112105: Make completer delims work on libedit (gh-112106)
(cherry picked from commit 2df26d8348)
Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>
* Fix crash when encoding is not string or None.
* Fix crash when both line_buffering and write_through raise exception
when converted ti int.
* Add a number of tests for constructor and reconfigure() method
with invalid arguments.
(cherry picked from commit ee06fffd38)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Fix undefined behaviour in datetime.time.fromisoformat() (GH-111982)
Fix undefined behaviour in datetime.time.fromisoformat() when parsing a string without a timezone. 'tzoffset' is not assigned to by parse_isoformat_time if it returns 0, but time_fromisoformat then passes tzoffset to another function, which is undefined behaviour (even if the function in question does not use the value).
(cherry picked from commit 21615f77b5)
Co-authored-by: T. Wouters <thomas@python.org>
GH-111804: Drop posix.fallocate() under WASI (GH-111869)
Drop posix.fallocate() under WASI.
The underlying POSIX function, posix_fallocate(), was found to vary too
much between implementations to remain in WASI. As such, while it was
available in WASI preview1, it's been dropped in preview2.
[3.11] gh-101180: Fix a bug where iso2022_jp_3 and iso2022_jp_2004 codecs read out of bounds (gh-111695)
(cherry picked from commit c8faa3568a)
Co-authored-by: Masayuki Moriyama <masayuki.moriyama@miraclelinux.com>
