Crash X11 with 3 commands

Crash X11 with 3 commands

[Nem W Schlecht]

I was experimenting with Xterm escape sequences - trying to
resize/reposition a window while its iconized and found I can crash
X11 in just 3 escape commands in an Xterm (which I have in a shell
script):

---------------------------------------------------------------
#!/bin/bash -x

# Iconify window
echo -ne "\e[2t"

# Set height/width to 36x80 and position at +100+100
# If I do just one of these X11 does *not* crash

# Resize to 36x80.  This one doesn't work, even if I run just it
# by itself so X11 doesn't crash.  Also, this one has to be first.
# If I re-position, then change geometry, it doesn't crash.
echo -ne "\e[8;36;80t"

# The re-position, next, actually does work behind the scenes,
# if I run just this alone and then de-iconify manually, its in the
# correct position.
echo -ne "\e[3;100;100t"

# To de-iconify (doesn't work in Cygwin anyways, unfortunately)
echo -ne "\e[1t"
---------------------------------------------------------------


Can anybody else confirm?  (WARNING - if it does, it'll kill all your
X11 windows!  Be careful.)




-- 
Nem W Schlecht
 "Perl did the magic.  I just waved the wand."

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Re: Crash X11 with 3 commands

[Jim Reisert AD1C]

On Fri, Dec 11, 2015 at 9:21 AM, Nem W Schlecht wrote:

> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
> X11 windows!  Be careful.)

Same here, kills the xterm as well as XWin.exe

-- 
Jim Reisert AD1C, <jjreisert@alum.mit.edu>, http://www.ad1c.us

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Re: Crash X11 with 3 commands

[Marco Atzeri]

On 11/12/2015 18:54, Jim Reisert AD1C wrote:
> On Fri, Dec 11, 2015 at 9:21 AM, Nem W Schlecht wrote:
>
>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>> X11 windows!  Be careful.)
>
> Same here, kills the xterm as well as XWin.exe
>

not on my W7-64

cygwin            2.4.0-0.9
xorg-server       1.18.0-1
xterm             320-1

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Re: Crash X11 with 3 commands

[Nem W Schlecht]

W7-64 for me as well.  Same xterm version too.

I was on xorg-server 1.17.4-1, but just now upped that to 1.18.0-1 and
I'm still getting the crash.  Will try upgrading cygwin core as well.

On Fri, Dec 11, 2015 at 11:59 AM, Marco Atzeri <marco.atzeri@gmail.com> wrote:
> On 11/12/2015 18:54, Jim Reisert AD1C wrote:
>>
>> On Fri, Dec 11, 2015 at 9:21 AM, Nem W Schlecht wrote:
>>
>>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>>> X11 windows!  Be careful.)
>>
>>
>> Same here, kills the xterm as well as XWin.exe
>>
>
> not on my W7-64
>
> cygwin            2.4.0-0.9
> xorg-server       1.18.0-1
> xterm             320-1
>
>
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-- 
Nem W Schlecht                   nem@emptec.com
Empyreal Technologies    http://www.emptec.com/
 "Perl did the magic.  I just waved the wand."

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Re: Crash X11 with 3 commands

[Nem W Schlecht]

Nope.  Still crashing with 2.4.0-0.9 for me.

Marco - when you run that script, does your xterm at least iconize?
What's in your xterm after you run the script?


On Fri, Dec 11, 2015 at 12:47 PM, Nem W Schlecht <nemws1@gmail.com> wrote:
> W7-64 for me as well.  Same xterm version too.
>
> I was on xorg-server 1.17.4-1, but just now upped that to 1.18.0-1 and
> I'm still getting the crash.  Will try upgrading cygwin core as well.
>
> On Fri, Dec 11, 2015 at 11:59 AM, Marco Atzeri <marco.atzeri@gmail.com> wrote:
>> On 11/12/2015 18:54, Jim Reisert AD1C wrote:
>>>
>>> On Fri, Dec 11, 2015 at 9:21 AM, Nem W Schlecht wrote:
>>>
>>>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>>>> X11 windows!  Be careful.)
>>>
>>>
>>> Same here, kills the xterm as well as XWin.exe
>>>
>>
>> not on my W7-64
>>
>> cygwin            2.4.0-0.9
>> xorg-server       1.18.0-1
>> xterm             320-1
>>


-- 
Nem W Schlecht
 "Perl did the magic.  I just waved the wand."

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Re: Crash X11 with 3 commands

[Stephen John Smoogen]

On 11 December 2015 at 11:51, Nem W Schlecht <nemws1@gmail.com> wrote:
> Nope.  Still crashing with 2.4.0-0.9 for me.
>
> Marco - when you run that script, does your xterm at least iconize?
> What's in your xterm after you run the script?
>

With various X problems it is usually useful to list what the video
card, display mode/size are in case it is those which may be crashing.

>>> cygwin            2.4.0-0.9
>>> xorg-server       1.18.0-1
>>> xterm             320-1
>>>
>
>
> --
> Nem W Schlecht
>  "Perl did the magic.  I just waved the wand."
>
> --
> Problem reports:       http://cygwin.com/problems.html
> FAQ:                   http://cygwin.com/faq/
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>



-- 
Stephen J Smoogen.

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Re: Crash X11 with 3 commands

[Jon Turney]

On 11/12/2015 16:21, Nem W Schlecht wrote:
> I was experimenting with Xterm escape sequences - trying to
> resize/reposition a window while its iconized and found I can crash
> X11 in just 3 escape commands in an Xterm (which I have in a shell
> script):
>
> ---------------------------------------------------------------
> #!/bin/bash -x
>
> # Iconify window
> echo -ne "\e[2t"
>
> # Set height/width to 36x80 and position at +100+100
> # If I do just one of these X11 does *not* crash
>
> # Resize to 36x80.  This one doesn't work, even if I run just it
> # by itself so X11 doesn't crash.  Also, this one has to be first.
> # If I re-position, then change geometry, it doesn't crash.
> echo -ne "\e[8;36;80t"
>
> # The re-position, next, actually does work behind the scenes,
> # if I run just this alone and then de-iconify manually, its in the
> # correct position.
> echo -ne "\e[3;100;100t"
>
> # To de-iconify (doesn't work in Cygwin anyways, unfortunately)
> echo -ne "\e[1t"
> ---------------------------------------------------------------
>
>
> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
> X11 windows!  Be careful.)

Thanks for reporting this.

I was able to reproduce the crash (sporadically), but only when I was 
using  XWin with the -compositewm option.  Are you using that?

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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Re: Crash X11 with 3 commands

[Andrey ``Bass'' Shcheglov]

[-- Attachment #1: Type: text/plain, Size: 1659 bytes --]

Just my 2 cents.

I can't reproduce this, but once the script is executed 3 or more times,
I start seeing permanent visual artifacts in the xterm window, which may
indicate memory corruption.

The artifacts have nothing to do with the terminal state (hard resetting
the terminal doesn't help).

The screenshot is here:
<https://habrastorage.org/files/23e/b52/ac4/23eb52ac47c246cd9fbd41fa50508a70.png>

Regards,
Andrey.

> On 11/12/2015 16:21, Nem W Schlecht wrote:
>> I was experimenting with Xterm escape sequences - trying to
>> resize/reposition a window while its iconized and found I can crash
>> X11 in just 3 escape commands in an Xterm (which I have in a shell
>> script):
>>
>> ---------------------------------------------------------------
>> #!/bin/bash -x
>>
>> # Iconify window
>> echo -ne "\e[2t"
>>
>> # Set height/width to 36x80 and position at +100+100
>> # If I do just one of these X11 does *not* crash
>>
>> # Resize to 36x80.  This one doesn't work, even if I run just it
>> # by itself so X11 doesn't crash.  Also, this one has to be first.
>> # If I re-position, then change geometry, it doesn't crash.
>> echo -ne "\e[8;36;80t"
>>
>> # The re-position, next, actually does work behind the scenes,
>> # if I run just this alone and then de-iconify manually, its in the
>> # correct position.
>> echo -ne "\e[3;100;100t"
>>
>> # To de-iconify (doesn't work in Cygwin anyways, unfortunately)
>> echo -ne "\e[1t"
>> ---------------------------------------------------------------
>>
>>
>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>> X11 windows!  Be careful.)


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 181 bytes --]

Re: Crash X11 with 3 commands

[Nem W Schlecht]

On Tue, Feb 23, 2016 at 12:13 PM, Jon Turney
<jon.turney@dronecode.org.uk> wrote:
>
> On 11/12/2015 16:21, Nem W Schlecht wrote:
>>
>> I was experimenting with Xterm escape sequences - trying to
>> resize/reposition a window while its iconized and found I can crash
>> X11 in just 3 escape commands in an Xterm (which I have in a shell
>> script):
>>
>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>> X11 windows!  Be careful.)
>
>
> Thanks for reporting this.
>
> I was able to reproduce the crash (sporadically), but only when I was using  XWin with the -compositewm option.  Are you using that?
>

Yes, I am.  My apologies, I added that ages ago and forgot about it.

-- 
Nem W Schlecht
 "Perl did the magic.  I just waved the wand."

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Re: Crash X11 with 3 commands

[Jon Turney]

On 24/02/2016 19:56, Nem W Schlecht wrote:
> On Tue, Feb 23, 2016 at 12:13 PM, Jon Turney wrote:
>> On 11/12/2015 16:21, Nem W Schlecht wrote:
>>>
>>> I was experimenting with Xterm escape sequences - trying to
>>> resize/reposition a window while its iconized and found I can crash
>>> X11 in just 3 escape commands in an Xterm (which I have in a shell
>>> script):
>>>
>>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>>> X11 windows!  Be careful.)
>>
>> Thanks for reporting this.
>>
>> I was able to reproduce the crash (sporadically), but only when I was using  XWin with the -compositewm option.  Are you using that?
>
> Yes, I am.  My apologies, I added that ages ago and forgot about it.

No problem and thanks for testing.

This crash should be fixed as of 1.18.1-2

Still no implementation of Windows requesting themselves to be 
deiconified, which is unfortunately not straightforward to add.

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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Re: Crash X11 with 3 commands

[Nem W Schlecht]

On Thu, Mar 3, 2016 at 1:25 PM, Jon Turney <jon.turney@dronecode.org.uk> wrote:
> On 24/02/2016 19:56, Nem W Schlecht wrote:
>>
>> On Tue, Feb 23, 2016 at 12:13 PM, Jon Turney wrote:
>>>
>>> On 11/12/2015 16:21, Nem W Schlecht wrote:
>>>>
>>>>
>>>> I was experimenting with Xterm escape sequences - trying to
>>>> resize/reposition a window while its iconized and found I can crash
>>>> X11 in just 3 escape commands in an Xterm (which I have in a shell
>>>> script):
>>>>
>>>> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
>>>> X11 windows!  Be careful.)
>>>
>>>
>>> Thanks for reporting this.
>>>
>>> I was able to reproduce the crash (sporadically), but only when I was
>>> using  XWin with the -compositewm option.  Are you using that?
>>
>>
>> Yes, I am.  My apologies, I added that ages ago and forgot about it.
>
>
> No problem and thanks for testing.
>
> This crash should be fixed as of 1.18.1-2
>
> Still no implementation of Windows requesting themselves to be deiconified,
> which is unfortunately not straightforward to add.

Works perfectly for me.  Thanks much, as always, Jon for your
un-ending, excellent support.  It is *greatly* appreciated!! :)

-- 
Nem W Schlecht
 "Perl did the magic.  I just waved the wand."

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