From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.2.17-14smp i686) xinetd is configured with an enabled telnet service; chkconfig confirms this. The configuration causes xinetd to listen to port 23 on all interfaces (netstat -a confirms this), and has no restrictions on the source address for the connection. Firewall rules allow the connection to be made through any interface (for now). After freshly restarting xinetd, I can usually succeed in getting a telnet connection through to the host. However, xinetd fails to start the telnet server for any subsequent connection attempt. The error logged implies a failure in system call execv(). The behaviour is consistent when attempting to use telnet from a remote host and when attempting to connect via 127.0.0.1 Actual syslog logs (debug level) are as follows: xinetd[905] START: telnet pid=911 from 127.0.0.1 xinetd[905] START: telnet pid=915 from 127.0.0.1 xinetd[915] execv( /usr/sbin/in.telnetd ) failed: Bad address (errno=14). It appears (from /usr/include/asm/errno.h) that execv() is returning EFAULT; "man execve" says EFAULT is returned when "<filename> points outside your accessible address space." Reproducible: Always Steps to Reproduce: 1. enable service in /etc/xinetd.d/telnet 2. /etc/rc.d/init/xinetd restart 3. telnet 127.0.0.1 4. telnet 127.0.0.1 5. goto 2. Actual Results: At step 3, telnet responds with the login prompt. At step 4, the connection is dropped "Connection closed by foreign host"
This should be fixed as of xinetd-2.1.8.9pre14-4 (-5 is in Wolverine) and later. Please reopen this bug ID if you find that this is not the case. Thanks!