Bug 136392

Created attachment 105453 [details]
strace

Created attachment 105454 [details]
ethereal pcap dump

This is easy to reproduce:

telnet localhost 113
123, 123
*** glibc detected *** double free or corruption: 0x082066b8 ***


I gave up on the random-identd-daemon-of-the-week game and installed
pidentd, which works fine.

I am seeing the same error.  This is a showstopper for anyone who
wants to use PostgreSQL IDENT authentication across a TCP/IP socket
(with JDBC for example).

Created attachment 106725 [details]
authd-1.2.8-1.fc3.src.rpm

authd-1.2.8-1.fc3 seems to work.  Attaching the SRPM for anyone who wants to
try it, since Rawhide packages tend to "just fade away".

laddr and raddr need to be set to NULL after they're freed in line 663

         else if (*laddr == '\0' || *raddr == '\0') {
             // host address doesn't match peer address, so skip it
-            free(laddr); free(raddr); continue;
         }
         else if (*laddr == '\0' || *raddr == '\0') {
             // host address doesn't match peer address, so skip it
+            free(laddr); free(raddr); laddr = raddr = NULL; continue;
         }