Bug#758660: sasl2-bin: saslauthd "Memory buffer error"

[Martin Sebald]

Hello Dan,

here you go:

/etc/postfix/sasl/smtpd.conf
pwcheck_method: saslauthd
mech_list: plain login
allow_plaintext: true
auxprop_plugin: sql
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user: xxx
sql_passwd: xxx
sql_database: xxx
sql_select: select password from mail_user where email = '%u@%r'

/etc/pam.d/smtp and /etc/pam.d/smtpd:
auth    required   pam_mysql.so user=xxx passwd=xxx host=127.0.0.1 db=xxx
table=mail_user usercolumn=email passwdcolumn=password crypt=1
account sufficient pam_mysql.so user=xxx passwd=xxx host=127.0.0.1 db=xxx
table=mail_user usercolumn=email passwdcolumn=password crypt=1

I am not quite sure which one is used by postfix...

> My belief is that this type of issue is due to a memory leak in the
> specific PAM module, or due to the way saslauthd uses pam - it only uses
> the auth and account facilities and not the session or password facilities,
> which may prevent the module from performing it's memory cleanup.

So does the work around work anyway? It seems that I not fully understand what
is going on. Anyway, if I restart saslauthd after the problem is there
everything works right away like there was never a problem.

Cheers,
Martin