The postmaster contains this code just before it waits for input:

#ifdef USE_SSL
        for (curr = DLGetHead(PortList); curr; curr = DLGetSucc(curr))
        {
            if (((Port *) DLE_VAL(curr))->ssl &&
                SSL_pending(((Port *) DLE_VAL(curr))->ssl) > 0)
            {
                no_select = true;
                break;
            }
        }
        if (no_select)
            FD_ZERO(&rmask);    /* So we don't accept() anything below */
#endif

I am not sure exactly what SSL_pending() is defined to mean, but as
near as I can tell, whenever SSL_pending() returns true, the postmaster
will completely ignore every other input-ready condition.  This spells
"denial of service" from where I sit: a nonresponsive SSL client will
cause the postmaster to freeze up for all other clients.

Can anyone who knows about SSL defend or even explain the above code?
I am strongly inclined to just dike it out.

			regards, tom lane

Tue, 24 Oct 2000 18:04:01 -0400
Tom Lane <tgl@sss.pgh.pa.us>
Bogus-looking SSL code in postmaster wait loop