[pam] BufferError: PyBuffer_FillInfo: view==NULL argument is obsolete

[goekce]

I was using 829b9ea and installed the newest commit. Authentication fails for both LDAP and local users on my xpra proxy. I use pam for both TCP_AUTH and AUTH:

...
make_authenticators('tcp', 'USERNAME', ws socket: ::ffff:127.0.0.1, 14500, 0, 0 <- ::ffff:127.0.0.1, 42102, 0, 0) socket options={}
creating authenticators ('pam', <module 'xpra.server.auth.pam_auth' from '/usr/lib/python3.9/site-packages/xpra/server/auth/pam_auth.py'>, <class 'xpra.server.auth.pam_auth.Authenticator'>, {'exec_cwd': >
authenticator 0: pam(USERNAME, {'exec_cwd': '/', 'connection': ws socket: ::ffff:127.0.0.1, 14500, 0, 0 <- ::ffff:127.0.0.1, 42102, 0, 0})=PAM
processing authentication with (PAM,), remaining=(PAM,), digest_modes=(...
authenticator[0]=PAM, requires-challenge=True, challenge-sent=False
get_challenge(...
Authentication required by PAM authenticator module 1
 sending challenge for username 'USERNAME' using xor digest
processing authentication with (PAM,), remaining=(PAM,), digest_modes=(...
authenticator[0]=PAM, requires-challenge=True, challenge-sent=True
combined salt...
authenticate_check(...
pam.check(..) pw=pwd.struct_passwd(pw_name='USERNAME', pw_passwd='x', pw_uid=12345, pw_gid=10001, pw_gecos='USER NAME', pw_dir='/home/USERNAME', pw_shell='/bin/bash')
pam check(USERNAME, [..])
check(..)
BufferError: PyBuffer_FillInfo: view==NULL argument is obsolete
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/xpra/server/auth/sys_auth_base.py", line 162, in authenticate_check
    ret = self.check(password)
  File "/usr/lib/python3.9/site-packages/xpra/server/auth/pam_auth.py", line 48, in check
    return check(self.username, password, self.service, self.check_account)
  File "/usr/lib/python3.9/site-packages/xpra/server/auth/pam_auth.py", line 23, in check
    if not session.start(b(password)):
  File "xpra/server/pam.pyx", line 168, in xpra.server.pam.pam_session.start
SystemError: <class 'Exception'> returned a result with an error set
Error: PAM authentication check failed: 
 <class 'Exception'> returned a result with an error set
Warning: authentication failed
 authentication failed
...

The referenced line:

xpra/xpra/server/pam.pyx

Line 168 in c4d8484

raise Exception("failed to read password data")

Does someone have any ideas for further debugging?

[totaam]

Oops, sorry!
This was caused by #3031, fixed in ae56b87 + 7f9ca3d. (not yet tested)