Package: telnetd Version: 0.17-36 Severity: normal
I have the following line in my inetd.conf: telnet stream tcp4 nowait nobody /usr/sbin/in.telnetd in.telnetd -hL /etc/rc.telnet If /etc/rc.telnet contains this: #!/bin/sh echo hi And I telnet to the machine, I get "hi" as output and the connection stays open, with in.telnetd using a lot of cpu time and having a zombie child (rc.telnet). Strace shows it is calling select and read in a tight loop: select(4, [0 3], [], [0], NULL) = 1 (in [3]) read(3, 0x60b5e0, 8192) = -1 EIO (Input/output error) select(4, [0 3], [], [0], NULL) = 1 (in [3]) read(3, 0x60b5e0, 8192) = -1 EIO (Input/output error) select(4, [0 3], [], [0], NULL) = 1 (in [3]) read(3, 0x60b5e0, 8192) = -1 EIO (Input/output error) select(4, [0 3], [], [0], NULL) = 1 (in [3]) read(3, 0x60b5e0, 8192) = -1 EIO (Input/output error) If I add a "sleep 1" to rc.telnet, then the connection is closed properly, so there seems to be a race condition somewhere. -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/4 CPU cores) Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages telnetd depends on: ii adduser 3.112 add and remove users and groups hi libc6 2.11.2-6 Embedded GNU C Library: Shared lib ii openbsd-inetd [inet- 0.20080125-6 The OpenBSD Internet Superserver ii passwd 1:4.1.4.2+svn3283-1 change and administer password and telnetd recommends no packages. telnetd suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
