diff mbox

kvm-autotest: stepeditor: clear image if width, height, or data are invalid

Message ID 1238794446-sup-7467@blackpad (mailing list archive)
State Not Applicable
Headers show

Commit Message

Eduardo Habkost April 3, 2009, 9:43 p.m. UTC
This patch fixes the following issue:

Excerpts from Eduardo Habkost's message of Fri Apr 03 17:37:56 -0300 2009:
> Excerpts from Ryan Harper's message of Wed Apr 01 12:55:58 -0300 2009:
> > Wondering if anyone else using kvm-autotest stepmaker has ever seen this
> > error:
> > 
> > Traceback (most recent call last):
> >   File
> > "/home/rharper/work/git/build/kvm-autotest/client/tests/kvm_runtest_2/stepmaker.
> > py", line 146, in update
> >     self.set_image_from_file(self.screendump_filename)
> >   File
> > "/home/rharper/work/git/build/kvm-autotest/client/tests/kvm_runtest_2/stepeditor
> > .py", line 499, in set_image_from_file
> >     self.set_image(w, h, data)
> >   File
> > "/home/rharper/work/git/build/kvm-autotest/client/tests/kvm_runtest_2/stepeditor
> > .py", line 485, in set_image
> >     w, h, w*3))
> > MemoryError
> 
> I've seen this error twice today, while trying to create a step file to
> install a Windows 2008 R2 64-bit guest (the Win2008-64 step file
> available on the git repository doesn't work for me). This happened when
> the guest was being rebooted by the windows installer. The contents of
> the screen dump file are this:
> 
> $ cat
> /home/ehabkost/autotest/kvm-autotest/client/results/default/kvm_runtest_2.Win200
> 8.64.install/debug/scrdump.ppm
> P6
> 0 0
> 255
> $ 
> 
> And the 0x0 pixmap really makes gdk panic:
> 
> >>> (w, h, data) =  ppm_utils.image_read_from_ppm_file('/home/ehabkost/autotest/kvm-autotest/client/results/default/kvm_runtest_2.Win2008.64.install/debug/scrdump.ppm')
> >>> w,h,data
> (0, 0, '')
> >>> gtk.gdk.pixbuf_new_from_data(data, gtk.gdk.COLORSPACE_RGB, False, 8,  w, h, w*3)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> MemoryError
> >>> 


Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 client/tests/kvm_runtest_2/stepeditor.py |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

Comments

Avi Kivity April 5, 2009, 12:31 p.m. UTC | #1
Eduardo Habkost wrote:
>>>>> SPACE_RGB, False, 8,  w, h, w*3)
>>>>>           
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> MemoryError
>>     
>
>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  client/tests/kvm_runtest_2/stepeditor.py |   14 +++++++++-----
>  1 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/client/tests/kvm_runtest_2/stepeditor.py b/client/tests/kvm_runtest_2/stepeditor.py
> index caaf47b..383834b 100755
> --- a/client/tests/kvm_runtest_2/stepeditor.py
> +++ b/client/tests/kvm_runtest_2/stepeditor.py
> @@ -488,14 +488,18 @@ Utilities
>          vscrollbar = self.scrolledwindow.get_vscrollbar()
>          vscrollbar.set_range(0, h)
>  
> +    def clear_image(self):
> +        self.image.clear()
> +        self.image_width = 0
> +        self.image_height = 0
> +        self.image_data = ""
> +        
>      def set_image_from_file(self, filename):
>          if not filename or not os.path.exists(filename):
> -            self.image.clear()
> -            self.image_width = 0
> -            self.image_height = 0
> -            self.image_data = ""
> -            return
> +            return self.clear_image()
>          (w, h, data) = ppm_utils.image_read_from_ppm_file(filename)
> +        if w <= 0 or h <= 0 or not data:
> +            return self.clear_image()
>          self.set_image(w, h, data)
>   

Instead of returning an empty image here, we should throw an exception.  
Qemu shouldn't write invalid image.

I've just sent a patch to qemu-devel which may help with this.
Eduardo Habkost April 5, 2009, 5:33 p.m. UTC | #2
On Sun, Apr 05, 2009 at 03:31:03PM +0300, Avi Kivity wrote:
> Eduardo Habkost wrote:
>>>>>> SPACE_RGB, False, 8,  w, h, w*3)
>>>>>>           
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in ?
>>> MemoryError
>>>     
>>
>>
<snip>
>>   
>
> Instead of returning an empty image here, we should throw an exception.   
> Qemu shouldn't write invalid image.

Throwing an exception is exactly what the current code does, and what I
want to prevent. stepeditor is a GUI application, there is no point in
aborting because the image is invalid during a small time window.

But fixing qemu is welcome, of course.

>
> I've just sent a patch to qemu-devel which may help with this.
Uri Lublin April 5, 2009, 5:33 p.m. UTC | #3
Avi Kivity wrote:
> Eduardo Habkost wrote:
>>
>> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
>> ---
>>  client/tests/kvm_runtest_2/stepeditor.py |   14 +++++++++-----
>>  1 files changed, 9 insertions(+), 5 deletions(-)
>>
>> diff --git a/client/tests/kvm_runtest_2/stepeditor.py 
>> b/client/tests/kvm_runtest_2/stepeditor.py
>> index caaf47b..383834b 100755
>> --- a/client/tests/kvm_runtest_2/stepeditor.py
>> +++ b/client/tests/kvm_runtest_2/stepeditor.py
>> @@ -488,14 +488,18 @@ Utilities
>>          vscrollbar = self.scrolledwindow.get_vscrollbar()
>>          vscrollbar.set_range(0, h)
>>  
>> +    def clear_image(self):
>> +        self.image.clear()
>> +        self.image_width = 0
>> +        self.image_height = 0
>> +        self.image_data = ""
>> +             def set_image_from_file(self, filename):
>>          if not filename or not os.path.exists(filename):
>> -            self.image.clear()
>> -            self.image_width = 0
>> -            self.image_height = 0
>> -            self.image_data = ""
>> -            return
>> +            return self.clear_image()
>>          (w, h, data) = ppm_utils.image_read_from_ppm_file(filename)
>> +        if w <= 0 or h <= 0 or not data:
>> +            return self.clear_image()
>>          self.set_image(w, h, data)
>>   
> 
> Instead of returning an empty image here, we should throw an exception.  
> Qemu shouldn't write invalid image.
> 
> I've just sent a patch to qemu-devel which may help with this.
> 

I'm going to accept this patch.

For step-maker and step-editor, I think we should let the user finish 
creating/editing the step-file (see Ryan's comment about wasting time).

For guest-installation test (kvm-guest-wizard), I agree that we should fail the 
test, and not ignore the error.

Thanks,
     Uri.
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diff mbox

Patch

diff --git a/client/tests/kvm_runtest_2/stepeditor.py b/client/tests/kvm_runtest_2/stepeditor.py
index caaf47b..383834b 100755
--- a/client/tests/kvm_runtest_2/stepeditor.py
+++ b/client/tests/kvm_runtest_2/stepeditor.py
@@ -488,14 +488,18 @@  Utilities
         vscrollbar = self.scrolledwindow.get_vscrollbar()
         vscrollbar.set_range(0, h)
 
+    def clear_image(self):
+        self.image.clear()
+        self.image_width = 0
+        self.image_height = 0
+        self.image_data = ""
+        
     def set_image_from_file(self, filename):
         if not filename or not os.path.exists(filename):
-            self.image.clear()
-            self.image_width = 0
-            self.image_height = 0
-            self.image_data = ""
-            return
+            return self.clear_image()
         (w, h, data) = ppm_utils.image_read_from_ppm_file(filename)
+        if w <= 0 or h <= 0 or not data:
+            return self.clear_image()
         self.set_image(w, h, data)
 
     def get_step_lines(self, output_dir=None, current_step=None):