Bug 111939 – net-analyzer/mtr - DoS on CPU

• Product: Gentoo Linux
• Status: RESOLVED UPSTREAM

[Description Clock 2005-11-08 23:50:16 UTC]

When the network is not connected and I run mtr 195.113.31.123, the X process
performs Denial of Service (DoS) attack on CPU for about 10 seconds - starts to
eat 100% CPU. It's annoying because the machine is rendered virtually unusable
during that time.

Determined using top.

Reproducible: Always
Steps to Reproduce:
1.
2.
3.




Portage 2.0.51.22-r3 (default-linux/x86/2005.0, gcc-3.3.6, glibc-2.3.5-r2,
2.6.12-gentoo-r10 i686)
=================================================================
System uname: 2.6.12-gentoo-r10 i686 Intel(R) Pentium(R) M processor 1.50GHz
Gentoo Base System version 1.6.13
dev-lang/python:     2.3.5-r2, 2.4.2
sys-apps/sandbox:    1.2.12
sys-devel/autoconf:  2.13, 2.59-r6
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1
sys-devel/binutils:  2.15.92.0.2-r10
sys-devel/libtool:   1.5.20
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -mcpu=i686 -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env
/usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config
/usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config
/usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/
/usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/
/usr/share/texmf/xdvi/ /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS=""
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/Linux/distributions/gentoo"
LC_ALL="en_US.UTF-8"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 X aac aalib alsa apm arts avi berkdb bitmap-fonts cdr crypt cups curl
dga divx4linux dri dv dvd dvdread eds emboss encode esd exif fam ffmpeg fftw
flac flash foomatic foomaticdb fortran ftp gd gdbm gif glut gnome gpm gstreamer
gtk gtk2 guile icq imagemagick imap imlib ipv6 jabber jack java javascript jpeg
kde ldap libcaca libg++ libwww live matroska mikmod ming mmap mmx mng motif
mozilla mp3 mpeg mysql nas ncurses nls ogg oggvorbis opengl oss pam pdflib perl
php png python qt quicktime readline real ruby samba sdl sharedmem shorten slang
socks5 speex spell sse ssl svg svga tcltk tcpd tetex theora threads tiff tls
truetype truetype-fonts type1-fonts unicode vorbis wifi win32codecs wmf xine
xinerama xml xml2 xmms xpm xv xvid zlib userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CTARGET, LANG, LDFLAGS, LINGUAS, PORTDIR_OVERLAY

[Comment 1 Jakub Moc (RETIRED) 2005-11-09 00:54:58 UTC]

So don't do it. :=)