Bugtraq mailing list archives

Re: Kvt bug


From: D.Yu.Bolkhovityanov () INP NSK SU (Dmitry Yu. Bolkhovityanov)
Date: Fri, 1 Oct 1999 15:14:36 +0700


On 30 Sep 99 at 11:56, pioppo () FERRARA LINUX IT wrote:

Wed, 29 Sep 1999, in a message titled "Kvt bug", Sebastian Wain wrote:

In the xterm there is a feature to change the title of the window
You can change the title of the window sending one of the escape codes of the
xterm.
(linux: man console_codes)

By Example:

ESC]2;This is my Xterm^G

This escape code changes the xterm's title to "This is my Xterm"

Obviously You can do the same using the kvt (Kde Virtual Terminal).
But the kvt has a buffer overflow. If the size of the new title of the
window is big enough then the kvt will do a core dump.

xterm too (version 3.3.2.3) coredumps...
I tried this with echo -e "\033]2;(60e+06 times 'a')\007"

    Tried the same with xterm 3.3.3 on i586, 64M RAM, 128M swap, continuously
increasing the number of 'a's (perl -e 'print "a" x 60000', 600000,
600000...).  But instead of xterm crash got Fvwm2 hangup after 6e6 "a"s.
I.e. everything else works -- I ould even press the "play" button in x11amp
with mouse, except Fvwm2.

    "strace -p <fvwm2pid>" shows that Fvwm2 waits infinitely on select().

    The only choice was to kill the window manager.

    All progs are from stock RedHat 6.0/i386 -- "Fvwm Version 2.2 compiled on
Apr  9 1999 at 16:15:38".
       ___________________________________________________________________
       Dmitry Yu. Bolkhovityanov  |  Novosibirsk, RUSSIA
       phone (383-2)-39-49-56     |  The Budker Institute of Nuclear Physics
                                  |  Lab. 5-13


Current thread: