Bug 49834 – Nylon segfaults when using a domain in the allow list that can't be resolved

• Product: Gentoo Linux
• Status: RESOLVED CANTFIX

[Description Gerben Welter 2004-05-03 06:16:48 UTC]

It seems that when domains are placed in the allow list, it tries to resolve that domain. If it can, no problem. If it can't, it segfault.

E.g.: you want to allow access from some client that has the following dnsname:
client123.dial.provider.net. But the hostname might change from time to time because of a dynamic ip. So you would like to allow dial.provider.net, but dial.provider.net doesn't resolve. That causes nylon to segfault. Tried with version 1.1 and 1.2 (ebuild and tar version)

Reproducible: Always
Steps to Reproduce:
1.Start nylon with: nylon -i eth0 -f -a "1.2.3.4 sub.otherdomain.com" -p 1150 &
2.
3.

Actual Results:  
nylon: Listening on your.domain.com:1150
free(): invalid pointer 0x40182030!
Segmentation fault


Expected Results:  
nylon: Listening on your.domain.com:1150

emerge info:

Portage 2.0.50-r6 (default-x86-1.4, gcc-3.3.2, glibc-2.3.2-r9, 2.4.25-gentoo)
=================================================================
System uname: 2.4.25-gentoo i686 Pentium III (Katmai)
Gentoo Base System version 1.4.9
distcc 2.13 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled]
Autoconf: sys-devel/autoconf-2.58-r1
Automake: sys-devel/automake-1.8.3
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-march=pentium3 -O3 -pipe"
CHOST="i686-pc-linux-gnu"
COMPILER="gcc3"
CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3/s
hare/config /usr/share/config /var/bind /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -mcpu=i686 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs ccache distcc sandbox"
GENTOO_MIRRORS="ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo"
MAKEOPTS="-j4"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="apm arts avi berkdb crypt cups encode esd foomaticdb gdbm gif gpm gtk2 
imlib jpeg kde ldap libg++ libwww mad mikmod motif mpeg mysql ncurses nls 
oggvorbis opengl oss pam pdflib perl png python qt quicktime readline sdl slang 
spell ssl svga tcltk tcpd truetype x86 xml2 xmms xv zlib"

[Comment 1 Daniel Ahlberg (RETIRED) 2004-05-10 06:24:06 UTC]

This is not a Gentoo bug, please report this bug to upstream author.

[Comment 2 Daniel Ahlberg (RETIRED) 2004-05-10 06:24:17 UTC]

This is not a Gentoo bug, please report this bug to upstream author.