[issue18233] SSLSocket.getpeercertchain()

[Christian Heimes]

Changes by Christian Heimes :


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versions:  -Python 3.6

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[issue28165] The 'subprocess' module leaks roughly 4 KiB of memory per call

[Xavion]

Changes by Xavion :


Removed file: http://bugs.python.org/file44671/Output.log

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[issue28165] The 'subprocess' module leaks roughly 4 KiB of memory per call

[Xavion]

Xavion added the comment:

It's easier to reproduce the issue if you use a timer (rather than a loop).  
The newly attached logfile was generated with the following code fragment.

def fTest() :
check_output("true")
threading.Timer(1, fTest, ()).start()

--
Added file: http://bugs.python.org/file44672/Output.log

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[issue9334] argparse does not accept options taking arguments beginning with dash (regression from optparse)

[Clint Olsen]

Clint Olsen added the comment:

Thanks for the suggestion!

It seems to be extremely limited, unfortunately. I don't want option processing 
to cease once I hit this switch.

p=argparse.ArgumentParser()
p.add_argument('--subscipt_args', nargs='...')
#p.add_argument('pos',nargs='*')
p.add_argument('--verbose', action='store_true')

args = p.parse_args('--subscipt_args --foo --bar --baz -- --verbose '.split())

print(args)

usage: test.py [-h] [--subscipt_args ...] [--verbose]
test.py: error: unrecognized arguments: -- --verbose

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[issue28124] Rework SSL module documentation

[Christian Heimes]

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[issue17128] OS X system openssl deprecated - installer should build local libssl

[Christian Heimes]

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[issue28022] SSL releated deprecation for 3.6

[Christian Heimes]

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[issue19500] Add client-side SSL session resumption

[Christian Heimes]

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[issue28085] SSL: Add client and server protocols for SSLContext

[Christian Heimes]

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[issue18233] SSLSocket.getpeercertchain()

[Christian Heimes]

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[issue25852] smtplib's SMTP.connect() should store the server name in ._host for .starttls()

[Christian Heimes]

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[issue27629] Cannot create ssl.SSLSocket without existing socket

[Christian Heimes]

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[issue16487] Allow ssl certificates to be specified from memory rather than files.

[Christian Heimes]

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[issue23239] SSL match_hostname does not accept IP Address

[Christian Heimes]

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[issue12197] non-blocking SSL write fails if a partial write was issued

[Christian Heimes]

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nosy: +paul.moore, steve.dower, tim.golden, zach.ware

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[issue20762] SSLSocket.read() not documented

[Christian Heimes]

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[issue12378] smtplib.SMTP_SSL leaks socket connections on SSL error

[Christian Heimes]

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[issue21541] Provide configure option --with-ssl for compilation with custom openssl

[Christian Heimes]

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[issue26471] load_verify_locations(cadata) should load AUX ASN.1 to supported trusted certs

[Christian Heimes]

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[issue25404] ssl.SSLcontext.load_dh_params() does not handle unicode filenames properly

[Christian Heimes]

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[issue20994] Disable TLS Compression

[Christian Heimes]

Christian Heimes added the comment:

For 3.6 and 3.7, _ssl__SSLContext_impl() now sets NO_COMPRESSION.

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[issue15464] ssl: add set_msg_callback function

[Christian Heimes]

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versions:  -Python 3.6

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[issue18369] X509 cert class for ssl module

[Christian Heimes]

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[issue27906] Socket accept exhaustion during high TCP traffic

[STINNER Victor]

STINNER Victor added the comment:

> On the asyncio side, with debug turned on, we see nothing.

Hum, I'm concerned by this issue. I would expect that in debug log, a log would 
be emitted. Maybe something like "accept queue saturated! we may probably loose 
incoming connections".

Does someone see a way to log a message in such case? Maybe only in debug mode?

I spent time to make sure that asyncio logs events related to network to try to 
understand what is happening. It's hard to decide which events should be 
logged, because logging everything is likely to flood logs.

For example, _SelectorSocketTransport._read_ready() logs an event for

* "EOF" (when recv() returns an empty string).
* transport pauses reading
* transport resumes reading

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[issue25674] test_ssl (test_algorithms) failures on bolen-ubuntu slaves: sha256.tbs-internet.com unknown host

[Christian Heimes]

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[issue27850] Remove 3DES from cipher list (sweet32 CVE-2016-2183)

[Christian Heimes]

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[issue25115] SSL_set_verify_depth not exposed by the ssl module

[Christian Heimes]

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[issue19084] No way to use TLS-PSK from python ssl

[Christian Heimes]

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[issue24516] SSL create_default_socket purpose insufficiently documented

[Christian Heimes]

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[issue24334] SSLSocket extra level of indirection

[Christian Heimes]

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[issue23588] Errno conflicts in ssl.SSLError

[Christian Heimes]

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[issue11943] Add TLS-SRP (RFC 5054) support to ssl, _ssl, http, and urllib

[Christian Heimes]

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[issue23033] Disallow support for a*.example.net, *a.example.net, and a*b.example.net in certificate wildcard handling.

[Christian Heimes]

Changes by Christian Heimes :


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versions:  -Python 3.5, Python 3.6

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[issue17123] Add OCSP support to ssl module

[Christian Heimes]

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[issue27766] Add ChaCha20 Poly1305 to SSL ciphers

[Christian Heimes]

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[issue26970] Replace OpenSSL's CPRNG with system entropy source

[Christian Heimes]

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[issue21649] Mention "Recommendations for Secure Use of TLS and DTLS"

[Christian Heimes]

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[issue22365] SSLContext.load_verify_locations(cadata) does not accept CRLs

[Christian Heimes]

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[issue27876] Add SSLContext.set_version_range(minver, maxver=None)

[Christian Heimes]

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[issue27768] ssl: get CPU cap flags for AESNI and PCLMULQDQ

[Christian Heimes]

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[issue18617] TLS and Intermediate Certificates

[Christian Heimes]

Changes by Christian Heimes :


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versions:  -Python 3.6

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[issue18880] ssl.SSLSocket shutdown doesn't behave like socket.shutdown

[Christian Heimes]

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[issue27995] Upgrade Python 3.4 to OpenSSL 1.0.2h on Windows

[Christian Heimes]

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[issue13403] Option for XMLPRC Server to support HTTPS

[Christian Heimes]

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[issue27815] Make SSL suppress_ragged_eofs default more secure

[Christian Heimes]

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[issue15670] PEP 3121, 384 Refactoring applied to ssl module

[Christian Heimes]

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versions:  -Python 3.6

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[issue26867] test_ssl test_options fails on ubuntu 16.04

[Christian Heimes]

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[issue27391] server_hostname should only be required when checking host names

[Christian Heimes]

Christian Heimes added the comment:

server_hostname is also required for SNI (server name indicator). Virtual 
hosting depends on the feature. Without SNI TLS extension you'll end up on the 
wrong vhost or the web server sends you the wrong certificate.

The feature is pretty much required these days.

--
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nosy: +christian.heimes
versions: +Python 3.7 -Python 3.3, Python 3.4

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[issue23749] asyncio missing wrap_socket (starttls)

[Christian Heimes]

Changes by Christian Heimes :


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assignee:  -> christian.heimes
components: +SSL
nosy: +christian.heimes
versions: +Python 3.6, Python 3.7 -Python 3.4

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[issue27354] SSLContext.load_verify_locations cannot handle paths on Windows which cannot be encoded using mbcs

[Christian Heimes]

Christian Heimes added the comment:

Is this still an issue?

--
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components: +SSL
nosy: +christian.heimes
stage:  -> needs patch
type:  -> behavior
versions: +Python 3.6, Python 3.7

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[issue20916] ssl.enum_certificates() will not return all certificates trusted by Windows

[Christian Heimes]

Changes by Christian Heimes :


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versions: +Python 3.6, Python 3.7

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[issue27340] bytes-like objects with socket.sendall(), SSL, and http.client

[Christian Heimes]

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[issue18546] ssl.get_server_certificate like addition for cert chain

[Christian Heimes]

Christian Heimes added the comment:

I'm closing the ticket as duplicate of #18233

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resolution:  -> duplicate
stage: needs patch -> resolved
status: open -> closed

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[issue28166] WindowsConsoleIO misbehavior when Ctrl+C is ignored

[Eryk Sun]

New submission from Eryk Sun:

_PyOS_WindowsConsoleReadline should continue to read when interrupted by Ctrl+C 
if SIGINT is ignored or the handler doesn't raise an exception. Currently it 
breaks out of the read loop, which looks like an EOF:

>>> import signal
>>> signal.signal(signal.SIGINT, signal.SIG_IGN)

>>> input()
Traceback (most recent call last):
  File "", line 1, in 
EOFError 

Also, in this case Ctrl+C quits the REPL. 

Similarly sys.stdin.buffer.raw should retry a read. Instead a read(1) returns 
an empty string and readall() raises an exception:

>>> sys.stdin.buffer.raw.read(1)
b''

>>> sys.stdin.buffer.raw.read()
Traceback (most recent call last):
  File "", line 1, in 
OSError: [WinError 87] The parameter is incorrect

--
components: IO, Library (Lib), Windows
messages: 276530
nosy: eryksun, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
stage: test needed
status: open
title: WindowsConsoleIO misbehavior when Ctrl+C is ignored
type: behavior
versions: Python 3.6, Python 3.7

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[issue18293] ssl.wrap_socket (cert_reqs=...), getpeercert, and unvalidated certificates

[Christian Heimes]

Changes by Christian Heimes :


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[issue26612] test_ssl: use context manager (with) to fix ResourceWarning

[Christian Heimes]

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[issue26815] SIGBUS in test_ssl.test_dealloc_warn() on "AMD64 FreeBSD 10.0 3.x" buildbot

[Christian Heimes]

Christian Heimes added the comment:

Does the test still crash? I haven't seen a crasher for a while.

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status: open -> pending
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[issue25292] ssl socket gets into broken state when client exits during handshake

[Christian Heimes]

Changes by Christian Heimes :


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assignee:  -> christian.heimes
components: +SSL
nosy: +christian.heimes
type:  -> behavior
versions: +Python 3.6, Python 3.7

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[issue26254] ssl should raise an exception when trying to load an unusable key (ECC key not using a named curve)

[Christian Heimes]

Christian Heimes added the comment:

The SSL module uses SSL_CTX_check_private_key() to verify the private key. 
Further validations are up to OpenSSL or you.

--
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nosy: +christian.heimes
resolution:  -> rejected
stage:  -> resolved
status: open -> closed

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[issue22559] [backport] ssl.MemoryBIO

[Christian Heimes]

Changes by Christian Heimes :


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components: +Extension Modules, SSL
type:  -> enhancement

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[issue15670] PEP 3121, 384 Refactoring applied to ssl module

[Giampaolo Rodola']

Changes by Giampaolo Rodola' :


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[issue27768] ssl: get CPU cap flags for AESNI and PCLMULQDQ

[Giampaolo Rodola']

Changes by Giampaolo Rodola' :


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[issue27876] Add SSLContext.set_version_range(minver, maxver=None)

[Giampaolo Rodola']

Changes by Giampaolo Rodola' :


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[issue28123] _PyDict_GetItem_KnownHash ignores DKIX_ERROR return

[STINNER Victor]

STINNER Victor added the comment:

If __eq__() raise an exception, _PyDict_GetItem_KnownHash() currently returns 
NULL and pass through the exception. To me, it looks like the correct behaviour.

With your patch, it looks like the _PyDict_GetItem_KnownHash() clears the 
__eq__() exception: return NULL with no exception set, as if the key is simply 
missing.

PyDict_GetItem() ignores *almost* all exceptions, but for bad reasons:

/* Note that, for historical reasons, PyDict_GetItem() suppresses all errors
 * that may occur (originally dicts supported only string keys, and exceptions
 * weren't possible).  (...) */

I would prefer to not ignore __eq__ exceptions, but pass them through.

To be clear: this is a behaviour change compared to Python 3.5 which works as 
PyDict_GetItem(), ignore *all* exceptions:

ep = (mp->ma_keys->dk_lookup)(mp, key, hash, &value_addr);
if (ep == NULL) {
PyErr_Clear();
return NULL;
}

I consider that it's ok to change _PyDict_GetItem_KnownHash() behaviour because 
this function is private and only used 4 times in 250k lines of C code.

Would you be interested to write a different patch to pass through the 
exception?

Note: It seems like _count_elements() (Modules/_collectionsmodule.c) doesn't 
handle correctly such error.

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[issue28165] The 'subprocess' module leaks roughly 4 KiB of memory per call

[Florian Bruhin]

Changes by Florian Bruhin :


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[issue13403] Option for XMLPRC Server to support HTTPS

[Petri Lehtinen]

Changes by Petri Lehtinen :


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[issue27354] SSLContext.load_verify_locations cannot handle paths on Windows which cannot be encoded using mbcs

[STINNER Victor]

STINNER Victor added the comment:

> Is this still an issue?

I'm not 100% sure that SSL_CTX_load_verify_locations() accepts a path encoded 
to UTF-8 on Windows.


To be 100% sure, it's "simple": try a filename not encoded to the ANSI code 
page on Windows.

The best would be to have an unit test for that. You use use 
test.support.TESTFN_UNENCODABLE for example.

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[issue26815] SIGBUS in test_ssl.test_dealloc_warn() on "AMD64 FreeBSD 10.0 3.x" buildbot

[STINNER Victor]

STINNER Victor added the comment:

Maybe the bug was fixed indirectly, maybe we missed a recent failure. Anyway, 
since this issue doesn't contain any useful information and I didn't see the 
failure recently, I decide to close it.

--
resolution:  -> out of date
status: pending -> closed

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[issue15369] pybench and test.pystone poorly documented

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 14.09.2016 15:20, STINNER Victor wrote:
> 
> STINNER Victor added the comment:
> 
>> I'd also like to request that you reword this dismissive line in the 
>> performance package's readme: (...)
> 
> Please report issues of the performance module on its own bug tracker:
> https://github.com/python/performance
> 
> Can you please propose a new description? You might even create a pull
> request ;-)

I'll send a PR.

> Note: I'm not sure that we should keep pybench, this benchmark really
> looks unreliable. But I should still try at least to use the same
> number of iterations for all worker child processes. Currently the
> calibration is done in each child process.

Well, pybench is not just one benchmark, it's a whole collection of
benchmarks for various different aspects of the CPython VM and per
concept it tries to calibrate itself per benchmark, since each
benchmark has different overhead.

The number of iterations per benchmark will not change between
runs, since this number is fixed in each benchmark. These numbers
do need an update, though, since at the time of writing pybench
CPUs were a lot less powerful compare to today.

Here's the comment with the guideline for the number of rounds
to use per benchmark:

# Number of rounds to execute per test run. This should be
# adjusted to a figure that results in a test run-time of between
# 1-2 seconds.
rounds = 10

BTW: Why would you want to run benchmarks in child processes
and in parallel ? This will usually dramatically effect the
results of the benchmark runs. Ideally, the pybench process
should be the only CPU intense work load on the entire CPU
to get reasonable results.

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[issue15369] pybench and test.pystone poorly documented

[STINNER Victor]

STINNER Victor added the comment:

Hum, since the discussion restarted, I reopen the issue ...

"Well, pybench is not just one benchmark, it's a whole collection of benchmarks 
for various different aspects of the CPython VM and per concept it tries to 
calibrate itself per benchmark, since each benchmark has different overhead."

In the performance module, you now get individual timing for each pybench 
benchmark, instead of an overall total which was less useful.


"The number of iterations per benchmark will not change between runs, since 
this number is fixed in each benchmark."

Please take a look at the new performance module, it has a different design. 
Calibration is based on minimum time per sample, no more on hardcoded things. I 
modified all benchmarks, not only pybench.


"BTW: Why would you want to run benchmarks in child processes and in parallel ?"

Child processes are run sequentially.

Running benchmarks in multiple processes help to get more reliable benchmarks. 
Read my article if you want to learn more about the design of my perf module:
http://haypo-notes.readthedocs.io/microbenchmark.html#my-articles


"Ideally, the pybench process should be the only CPU intense work load on the 
entire CPU to get reasonable results."

The perf module automatically uses isolated CPU. It strongly suggests to use 
this amazing Linux feature to run benchmarks!
https://haypo.github.io/journey-to-stable-benchmark-system.html

I started to write advices to get stable benchmarks:
https://github.com/python/performance#how-to-get-stable-benchmarks

Note: See also the https://mail.python.org/mailman/listinfo/speed mailing list 
;-)

--
resolution: fixed -> 
status: closed -> open

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Re: [issue15369] pybench and test.pystone poorly documented

[M.-A. Lemburg]

On 15.09.2016 11:11, STINNER Victor wrote:
> 
> STINNER Victor added the comment:
> 
> Hum, since the discussion restarted, I reopen the issue ...
> 
> "Well, pybench is not just one benchmark, it's a whole collection of 
> benchmarks for various different aspects of the CPython VM and per concept it 
> tries to calibrate itself per benchmark, since each benchmark has different 
> overhead."
> 
> In the performance module, you now get individual timing for each pybench 
> benchmark, instead of an overall total which was less useful.

pybench had the same intention. It was a design mistake to add an
overall timing to each suite run. The original intention was to
compare each benchmark individually.

Perhaps it would make sense to try to port the individual benchmark
tests in pybench to performance.

> "The number of iterations per benchmark will not change between runs, since 
> this number is fixed in each benchmark."
> 
> Please take a look at the new performance module, it has a different design. 
> Calibration is based on minimum time per sample, no more on hardcoded things. 
> I modified all benchmarks, not only pybench.

I think we are talking about different things here: calibration is
pybench means that you try to determine the overhead of the
outer loop and possible setup code that is needed to run the
the test.

pybench runs a calibration method which has the same
code as the main test, but without the actual operations that you
want to test, in order to determine the timing of the overhead.

It then takes the minimum timing from overhead runs and uses
this as base line for the actual test runs (it subtracts the
overhead timing from the test run results).

This may not be ideal in all cases, but it's the closest
I could get to timing of the test operations at the time.

I'll have a look at what performance does.

> "BTW: Why would you want to run benchmarks in child processes and in parallel 
> ?"
> 
> Child processes are run sequentially.

Ah, ok.

> Running benchmarks in multiple processes help to get more reliable 
> benchmarks. Read my article if you want to learn more about the design of my 
> perf module:
> http://haypo-notes.readthedocs.io/microbenchmark.html#my-articles

Will do, thanks.

> "Ideally, the pybench process should be the only CPU intense work load on the 
> entire CPU to get reasonable results."
> 
> The perf module automatically uses isolated CPU. It strongly suggests to use 
> this amazing Linux feature to run benchmarks!
> https://haypo.github.io/journey-to-stable-benchmark-system.html
> 
> I started to write advices to get stable benchmarks:
> https://github.com/python/performance#how-to-get-stable-benchmarks
> 
> Note: See also the https://mail.python.org/mailman/listinfo/speed mailing 
> list ;-)

I've read some of your blog posts and articles on the subject
and your journey. Interesting stuff, definitely. Benchmarking
these days appears to have gotten harder not simpler compared to
the days of pybench some 19 years ago.

-- 
Marc-Andre Lemburg
eGenix.com

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[issue28165] The 'subprocess' module leaks roughly 4 KiB of memory per call

[Antti Haapala]

Antti Haapala added the comment:

Ahhah, the title should say: subprocess module leaks 4kiB memory **per thread**.

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[issue15369] pybench and test.pystone poorly documented

[STINNER Victor]

STINNER Victor added the comment:

2016-09-15 11:21 GMT+02:00 Marc-Andre Lemburg :
> I think we are talking about different things here: calibration is
> pybench means that you try to determine the overhead of the
> outer loop and possible setup code that is needed to run the
> the test.
> (...)
> It then takes the minimum timing from overhead runs and uses
> this as base line for the actual test runs (it subtracts the
> overhead timing from the test run results).

Calibration in perf means computing automatically the number of
outer-loops to get a sample of at least 100 ms (default min time).

I simply removed the code to estimate the overhead of the outer loop
in pybench. The reason is this line:

# Get calibration
min_overhead = min(self.overhead_times)

This is no such "minimum timing", it doesn't exist :-) In benchmarks,
you have to work on statistics: use average, standard deviation, etc.

If you badly estimate the minimum overhead, you might get negative
timings, which is not allowed in perf (even zero is an hard error in
perf).

It's not possible to compute *exactly* the "minimum overhead".

Moreover, removing the code to estimate the overhead simplified the code.

> Benchmarking these days appears to have gotten harder not simpler compared to 
> the days of pybench some 19 years ago.

Benchmarking was always a hard problem. Modern hardware (Out of order
CPU, variable CPU frequency, power saving, etc.) problably didn't help
:-)

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[issue28167] remove platform.linux_distribution()

[Matthias Klose]

New submission from Matthias Klose:

platform.linux_distribution() was deprecated in 3.5, and should be removed.

Can't be kept up to date, see #18872, #19213, #20454, #1180267, plus uncounted 
issues closed as won't fix.

I'm surprised that #26041 removed the removal warnings again after such a long 
discussion.

--
messages: 276541
nosy: berker.peksag, doko, ned.deily
priority: normal
severity: normal
status: open
title: remove platform.linux_distribution()

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[issue28167] remove platform.linux_distribution()

[Chi Hsuan Yen]

Changes by Chi Hsuan Yen :


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[issue28167] remove platform.linux_distribution()

[STINNER Victor]

STINNER Victor added the comment:

> platform.linux_distribution() was deprecated in 3.5, and should be removed.

Is it replaced with the distro package?

FYI I reported the issue to pip and it seems like pip now embeds and uses 
distro:

* https://github.com/pypa/pip/issues/3823
* https://github.com/pypa/pip/pull/3906

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[issue28167] remove platform.linux_distribution()

[Berker Peksag]

Berker Peksag added the comment:

I think the current consensus is to keep old APIs around to make porting from 
Python 2 easier. That's why I opened issue 26041.

See also msg256111 and "Deprecation policy PEP" proposed at 
https://mail.python.org/pipermail/python-committers/2016-January/003706.html

If Marc-Andre (platform module maintainer) and Ned give their +1s, I don't have 
a strong objection against the removal of the function.

Also, it looks like I forgot to remove deprecated-removed directive in 
5d9f961edc30: 
https://docs.python.org/3.6/library/platform.html#platform.linux_distribution

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[issue28168] Use _winapi.WaitForMultipleObjects in Popen.wait()

[Eryk Sun]

New submission from Eryk Sun:

On Unix, waiting on an instance of subprocess.Popen in the main thread is 
interruptible by Ctrl+C. On Windows, it currently calls 
_winapi.WaitForSingleObject, which isn't interruptible. It should instead call 
_winapi.WaitForMultipleObjects, which automatically adds the SIGINT event 
object from _PyOS_SigintEvent() when called from the main thread.

--
components: Library (Lib), Windows
messages: 276544
nosy: eryksun, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
stage: needs patch
status: open
title: Use _winapi.WaitForMultipleObjects in Popen.wait()
type: enhancement
versions: Python 3.6, Python 3.7

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[issue27973] urllib.urlretrieve() fails on second ftp transfer

[Sohaib Ahmad]

Sohaib Ahmad added the comment:

I didn't know that urllib.urlopen() retrieves complete object in case of FTP. 
When getresp() is called for big files (the one in issue26960), RETR command is 
initiated and server returns code 150 which means "standby for another reply" 
and there is where the control got stuck and issue26960 was reported.

This is the end of debug log with the file mentioned in issue26960, after which 
the control got stuck:

*cmd* 'TYPE I'
*put* 'TYPE I\r\n'
*get* '200 Type set to I\r\n'
*resp* '200 Type set to I'
*cmd* 'PASV'
*put* 'PASV\r\n'
*get* '227 Entering Passive Mode (130,133,3,130,207,26).\r\n'
*resp* '227 Entering Passive Mode (130,133,3,130,207,26).'
*cmd* 'RETR ratings.list.gz'
*put* 'RETR ratings.list.gz\r\n'
*get* '150 Opening BINARY mode data connection for ratings.list.gz (12643237 
bytes)\r\n'
*resp* '150 Opening BINARY mode data connection for ratings.list.gz (12643237 
bytes)'

And this is the end of debug log of a very small file transfer over FTP:

*cmd* 'PASV'
*put* 'PASV\r\n'
*get* '227 Entering Passive Mode (130,239,18,165,234,243).\r\n'
*resp* '227 Entering Passive Mode (130,239,18,165,234,243).'
*cmd* 'RETR Contents-udeb-ppc64el.gz'
*put* 'RETR Contents-udeb-ppc64el.gz\r\n'
*get* '150 Opening BINARY mode data connection for Contents-udeb-ppc64el.gz 
(26555 bytes).\r\n'
*resp* '150 Opening BINARY mode data connection for Contents-udeb-ppc64el.gz 
(26555 bytes).'
*get* '226 Transfer complete.\r\n'
*resp* '226 Transfer complete.'

The control returned successfully once FTP returned 2xx.

Please correct me if I am wrong but from the RETR command it looks like it is 
trying the retrieve the whole file in both cases. Is urlopen() supposed to 
retrieve files when called or just get the headers/information etc.?

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[issue28168] Use _winapi.WaitForMultipleObjects in Popen.wait()

[Eryk Sun]

Eryk Sun added the comment:

This patch makes the trivial change to the Popen.wait() method and also 
modifies _winapi.WaitForMultipleObjects to restart the wait if SIGINT is 
ignored or the handler didn't raise an exception.

--
keywords: +patch
stage: needs patch -> patch review
Added file: http://bugs.python.org/file44673/issue_28168_01.patch

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[issue27482] heap-buffer-overflow on address 0x6250000078ff

[Francisco Couzo]

Francisco Couzo added the comment:

I can confirm this bug is also present in 3.7

--
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versions: +Python 3.7

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[issue28128] Improve the warning message for invalid escape sequences

[Emanuel Barry]

Emanuel Barry added the comment:

Besides converting the DeprecationWarning to a Syntax{Error,Warning}, I don't 
see an easy way to include the offending line (or even file). The place in the 
code where the strings are created has no idea *where* they are being defined. 
AIUI, either we special-case this, or we resolve #28028 (but I don't think the 
latter can go in 3.6).

--
assignee: ebarry -> 

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[issue27400] Datetime NoneType after calling Py_Finalize and Py_Initialize

[Roman Evstifeev]

Changes by Roman Evstifeev :


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[issue28169] shift exponent overflow

[Francisco Couzo]

New submission from Francisco Couzo:

Steps to reproduce:
make distclean
LDFLAGS="-lasan -lubsan" CFLAGS="-fsanitize=address -fsanitize=undefined" 
./configure
ASAN_OPTIONS="detect_leaks=0" make
UBSAN_OPTIONS=print_stacktrace=1 
ASAN_OPTIONS="allocator_may_return_null=1:detect_leaks=0" ./python -m 
test.test_ctypes

/home/fran/code/cpython/Modules/_ctypes/cfield.c:580:5: runtime error: shift 
exponent 18446744073709551614 is too large for 32-bit type 'int'
#0 0x7fb4b3d3f6f6 in h_get 
/home/fran/code/cpython/Modules/_ctypes/cfield.c:580
#1 0x6fc95b in _PyObject_GenericGetAttrWithDict Objects/object.c:1060
#2 0x6fc95b in PyObject_GenericGetAttr Objects/object.c:1121
#3 0x9330a0 in builtin_getattr Python/bltinmodule.c:985
#4 0x6e7d20 in _PyCFunction_FastCallDict Objects/methodobject.c:234
#5 0x6e7d20 in _PyCFunction_FastCallKeywords Objects/methodobject.c:295
#6 0x944cfc in call_function Python/ceval.c:4763
#7 0x95a0f4 in _PyEval_EvalFrameDefault Python/ceval.c:3250
#8 0x9407f0 in PyEval_EvalFrameEx Python/ceval.c:718
#9 0x9407f0 in _PyFunction_FastCall Python/ceval.c:4845
#10 0x945235 in fast_function Python/ceval.c:4880
#11 0x945235 in call_function Python/ceval.c:4784
#12 0x95a0f4 in _PyEval_EvalFrameDefault Python/ceval.c:3250
#13 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#14 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#15 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#16 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#17 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#18 0x5125ba in PyObject_Call Objects/abstract.c:2248
#19 0x957bb0 in do_call_core Python/ceval.c:5032
#20 0x957bb0 in _PyEval_EvalFrameDefault Python/ceval.c:3332
#21 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#22 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#23 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#24 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#25 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#26 0x5125ba in PyObject_Call Objects/abstract.c:2248
#27 0x766761 in slot_tp_call Objects/typeobject.c:6146
#28 0x5130b6 in _PyObject_FastCallDict Objects/abstract.c:2318
#29 0x944103 in call_function Python/ceval.c:4787
#30 0x95a0f4 in _PyEval_EvalFrameDefault Python/ceval.c:3250
#31 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#32 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#33 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#34 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#35 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#36 0x5125ba in PyObject_Call Objects/abstract.c:2248
#37 0x957bb0 in do_call_core Python/ceval.c:5032
#38 0x957bb0 in _PyEval_EvalFrameDefault Python/ceval.c:3332
#39 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#40 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#41 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#42 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#43 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#44 0x5125ba in PyObject_Call Objects/abstract.c:2248
#45 0x766761 in slot_tp_call Objects/typeobject.c:6146
#46 0x5130b6 in _PyObject_FastCallDict Objects/abstract.c:2318
#47 0x944103 in call_function Python/ceval.c:4787
#48 0x95a0f4 in _PyEval_EvalFrameDefault Python/ceval.c:3250
#49 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#50 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#51 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#52 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#53 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#54 0x5125ba in PyObject_Call Objects/abstract.c:2248
#55 0x957bb0 in do_call_core Python/ceval.c:5032
#56 0x957bb0 in _PyEval_EvalFrameDefault Python/ceval.c:3332
#57 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#58 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#59 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#60 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#61 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#62 0x5125ba in PyObject_Call Objects/abstract.c:2248
#63 0x766761 in slot_tp_call Objects/typeobject.c:6146
#64 0x5130b6 in _PyObject_FastCallDict Objects/abstract.c:2318
#65 0x944103 in call_function Python/ceval.c:4787
#66 0x95a0f4 in _PyEval_EvalFrameDefault Python/ceval.c:3250
#67 0x94292f in PyEval_EvalFrameEx Python/ceval.c:718
#68 0x94292f in _PyEval_EvalCodeWithName Python/ceval.c:4094
#69 0x9780b8 in _PyFunction_FastCallDict Python/ceval.c:4996
#70 0x5132d7 in _PyObject_FastCallDict Objects/abstract.c:2297
#71 0x513904 in _PyObject_Call_Prepend Objects/abstract.c:2360
#72

[issue28168] Use _winapi.WaitForMultipleObjects in Popen.wait()

[Eryk Sun]

Changes by Eryk Sun :


Added file: http://bugs.python.org/file44674/issue_28168_02.patch

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[issue28169] shift exponent overflow

[Martin Panter]

Martin Panter added the comment:

Perhaps this is a dupe of Issue 15119. When I was testing with the sanitizer, 
the only excessive shift error I got was explained by that bug.

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[issue28137] Windows sys.path file should be renamed

[Wolfgang Langner]

Wolfgang Langner added the comment:

If this is only for the use case of embedded distribution we are now only to 
steps away to provide a easy custom shipping of applications for Windows.

1. Take the file name of the executable to load a custom EXECUTABLENAME.path 
file
2. Allow to specify a main to be executed or a pyz zipapp to be run with the -m 
switch. Or simply use first line of the path file if it contains "-m myapp".

With this by only renaming the python.exe and having a simple text file with 
the information, custom applications distribution can be done.

Sorry, I know not directly related to this.

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[issue27354] SSLContext.load_verify_locations cannot handle paths on Windows which cannot be encoded using mbcs

[Steve Dower]

Steve Dower added the comment:

TESTFN_UNENCODABLE will be invalid utf8 now, as the name is chosen by 
attempting to encode a list of names and using the first one to fail.

No code pages have emoji in them AFAIK, so a test with one of those would do.

ISTR looking at this function though and finding that OpenSSL will decide utf8 
if that's what is passed, in which case we're fine now. Or maybe I'm thinking 
of Tcl...

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[issue28137] Windows sys.path file should be renamed

[Paul Moore]

Paul Moore added the comment:

You can actually handle this already, with a simple wrapper program (based on 
the one in PC\WinMain.c):

/* Minimal main program -- everything is loaded from the library. */

#include "Python.h"

#define WIN32_LEAN_AND_MEAN
#include 

int wmain()
{
wchar_t **myargv = malloc((__argc + 3) * sizeof(wchar_t*));
int i;
myargv[0] = __wargv[0];
myargv[1] = L"myapp.zip";
for (i = 1; i < __argc; ++i) {
myargv[1+i] = __wargv[i];
}
myargv[1+i] = 0;
return Py_Main(__argc+1, myargv);
}

This injects your application name "myapp.zip" as the first argument and then 
calls the Python main interpreter. Run this with a conventional embedded 
Python, and you have a standalone application.

You can easily tidy the above sample up (it's just a quick hack) to make it 
generic by working out the name of the zipped Python application from the exe 
name.

But thanks for the idea - I hadn't really thought about doing something like 
this until you prompted me to investigate.

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[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Rafał Chłodnicki]

Rafał Chłodnicki added the comment:

Only a part of this fix was backported to 3.3 branch (in 
http://bugs.python.org/issue20160#msg272059). The other important part was only 
backported to 3.4 and up in http://bugs.python.org/issue20160#msg230723 .

Should this still be fixed?

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[issue22733] MSVC ffi_prep_args doesn't handle 64-bit arguments properly

[Rafał Chłodnicki]

Rafał Chłodnicki added the comment:

Maybe worth backporting to 3.3 and up? Especially if #20160 is to be backported 
as they seem to be related.

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[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Christian Heimes]

Christian Heimes added the comment:

3.3 no longer receives any updates, neither security nor feature updates. 3.3.7 
was the final release of 3.3.

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[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Christian Heimes]

Christian Heimes added the comment:

Small correction, 3.3 will get security updates until 2017. This bug is clearly 
not a security issue. The patch should not have landed in 3.3 in the first 
patch.

https://www.python.org/dev/peps/pep-0398/#id7

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[issue28138] Windows _sys.path file should allow import site

[Wolfgang Langner]

Wolfgang Langner added the comment:

But this is nearly the same as a *.pth file.
Using the same logic and extension then does not confuse more users.

Why not doing the same as with a .pth file?

Using something like a _sys.pth file if it is there it will be used for path 
handling. In all cases on all platforms for interpreter startup.
(if we will have the embedded interpreter on more platforms)

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[issue22493] Deprecate the use of flags not at the start of regular expression

[Tim Graham]

Tim Graham added the comment:

Could we include the offending pattern in the deprecation message? I'm 
attaching a proposed patch. With that patch I can more easily find the 
offending pattern, whereas before I had no idea:

django/django/urls/resolvers.py:101: DeprecationWarning: Flags not at the start 
of the expression ^(?i)test/2/?$
  compiled_regex = re.compile(regex, re.UNICODE)

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Added file: http://bugs.python.org/file44675/better-warning.diff

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[issue28128] Improve the warning message for invalid escape sequences

[R. David Murray]

R. David Murray added the comment:

Are SyntaxWarnings silent by default?  If not it can't even go into 3.7.

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[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Vinay Sajip]

Vinay Sajip added the comment:

> This bug is clearly not a security issue.

I'm not sure it's all that clear - the bug could cause a crash (observed in 
practice - not theoretical), which perhaps could be exploited. See Steve 
Dower's message msg272008 in this thread. That's why I added the patch in 3.3.

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[issue22493] Deprecate the use of flags not at the start of regular expression

[Tim Graham]

Tim Graham added the comment:

And on further investigation, I'm not sure how to fix the deprecation warnings 
in Django. We have a urlpattern like this:

  url(r'^(?i)CaseInsensitive/(\w+)', empty_view, name="insensitive"),

The regex string r'^(?i)CaseInsensitive/(\w+)' is later substituted in this 
line in Django's URL resolver as the `pattern`:

if re.search('^%s%s' % (re.escape(_prefix), pattern), candidate_pat % 
candidate_subs, re.UNICODE):

It seems Django would need to extract any flags from `pattern` and put them at 
the start of the '^%s%s' string that's constructed for re.search(). I'm not 
sure if this can be done easily.

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[issue28138] Windows _sys.path file should allow import site

[Steve Dower]

Steve Dower added the comment:

On issue28137 I agreed with the proposal to rename to EXENAME.pth, but rather 
than supporting all of .pth file's syntax we would abort the process on 
anything we don't like.

Specifically, we'd allow relative paths, absolute paths, blank lines, comments, 
and "import site". (The parsing code is written in C and runs before 
initialization, so we can't exec stuff anyway, but if I had my way I'd ban that 
from .pth files everywhere.)

Supporting this on other platforms requires porting the code to 
Python/getpath.c. I took a quick survey of core devs at the sprints and nobody 
seemed desperate to have it, but it's something that we can add at any time 
since it is tied to build/install (rather than anything you'd write in Python 
code).

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[issue28137] Windows sys.path file should be renamed

[Steve Dower]

Steve Dower added the comment:

I like it. Making the name match the exe name should have been obvious, and if 
nobody is opposed to simply aborting on unsupported syntax (i.e. imports other 
than site) I don't actually mind making it .pth.

It's a separate idea, but what if the presence of a __main__.py file caused 
that file to always run and every argument gets passed to that instead? The 
purposes seem separate enough to use two files. And we could implement that 
part easily enough in PC/WinMain.c, as Paul suggests.

Both of these options are fairly aggressive wrt other command line options 
(i.e. how do you specify unbuffered IO? how do you set the hash seed?), but the 
point is really that you wouldn't use them with these options - if you don't 
want to build your own main() function, the defaults should be good enough.

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