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    Date: Пт, 01 окт 1999  12:14:36

   От: "Dmitry Yu. Bolkhovityanov" 

 Кому: BUGTRAQ@SECURITYFOCUS.COM

 Тема: Re: Kvt bug

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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 " 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