Python: Unable to import cryptography package due to 'cannot enable executable stack...'

[derekbekoe]

• Your Windows build number: (Type ver at a Windows Command Prompt)

Microsoft Windows [Version 10.0.15063]

• What you're doing and what's happening: (Copy&paste specific commands and their output, or include screen shots)
  Steps to repro (I start from a fresh Windows VM with WSL installed):

$ wget https://bootstrap.pypa.io/get-pip.py
$ sudo python3 get-pip.py
$ python3 -m pip install cryptography==2.0.1
$ python3 -c "from cryptography.hazmat.bindings._openssl import ffi"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: /usr/local/lib/python3.5/dist-packages/cryptography/hazmat/bindings/_openssl.abi3.so: cannot enable executable stack as shared object requires: Invalid argument
$ echo $?
1

I specify 2.0.1 as that was when the issue appeared (it also fails on new releases since then).
It works with cryptography 2.0 however...

$ python3 -m pip install cryptography==2.0
$ python3 -c "from cryptography.hazmat.bindings._openssl import ffi"
$ echo $?
0

• What's wrong / what should be happening instead:

What should be happening is with newer versions of cryptography, the import should work and so the exit code of python3 -c "from cryptography.hazmat.bindings._openssl import ffi" should be 0.

• Strace of the failing command, if applicable: (If <cmd> is failing, then run strace -o strace.txt -ff <cmd>, and post the strace.txt output here)

Attached is the output of strace -o strace.txt -ff python3 -c "from cryptography.hazmat.bindings._openssl import ffi" with cryptography==2.0.1:

strace.txt

The original issue is from Azure CLI Azure/azure-cli#4154.

This seems somewhat related to the following as they both show the error cannot enable executable stack as shared object requires: Invalid argument:
#1128
#286

[derekbekoe]

Also, here is the change log for cryptography is that helps https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst#201---2017-07-26

[benhillis]

Thanks for posting, this is the same issue as #286 (lack of support for executable stack).