[vbox-dev] attach CD/DVD aborts the guest

[Perry Halbert]

I still can't find the exact cause even with the debug build.  But I see 
this in the hosts syslog

kernel: [  864.637068] EXT4-fs (sdb1): Unaligned AIO/DIO on inode 
23068695 by AioMgr0-N; performance will be poor.
kernel: [  907.647546] VirtualBox[3025]: segfault at 10 ip 
00007ffe574ede84 sp 00007fff617f1610 error 4 in 
libpthread-2.15.so[7ffe574e4000+18000]

All that is needed to trigger this segfault is to select choose a 
virtual cd in the devices menu.

This happens on two separate (Debian based) systems the laptop was built 
using deb build and the main PC as a run file install.



On 03/07/2013 01:18 PM, Perry Halbert wrote:

> One more thing.  I can revert back to r44844 and the problem 
> disappears.  But wait it gets better.
> After the latest today r44929 saved state even causes an abort.
>
>
> On 03/07/2013 08:22 AM, Perry Halbert wrote:
>> OK.  It's more of a heads up any way because usually when I see these 
>> issues there is a gremlin lurking somewhere.
>>
>> If I locate it I will send along the cause.
>>
>>
>>
>>
>> On 03/07/2013 07:52 AM, Klaus Espenlaub wrote:
>>> On 07.03.2013 00:38, Perry Halbert wrote:
>>>> Still can't locate it. All I know for sure is that it is a segfault.
>>>>
>>>> Core was generated by `/opt/VirtualBox/VirtualBox -startvm Debian-SID'.
>>>> Program terminated with signal 11, Segmentation fault.
>>>> #0 0x00007fb07dbf3e84 in ?? ()
>>>>
>>>> Core was generated by `/opt/VirtualBox/VirtualBox -startvm Mint-14'.
>>>> Program terminated with signal 11, Segmentation fault.
>>>> #0 0x00007f3ba1546e84 in ?? ()
>>>>
>>>> It happens the second I click on select CD in the device menu.
>>>>
>>>> I must admit that I am not the sharpest knife in the drawer with core
>>>> dumps. The dump is 7MB tar'ed (217.5MB) each.
>>>>
>>>> I can send it to you if you like.
>>> The core won't help me much since you're running your own builds, and I
>>> wouldn't have the matching debug info.
>>>
>>> Did you install the ...-dbg package? Then you should get much more out
>>> of gdb than just some hex values.
>>>
>>> Klaus
>>>> On 03/04/2013 09:02 AM, Klaus Espenlaub wrote:
>>>>> On 03.03.2013 19:01, Perry Halbert wrote:
>>>>>> I seem to have an issue that I can't put my finger on. With the latest
>>>>>> builds from SVN r44872&  r44885 if I try to select a CD/DVD image to the
>>>>>> "running" guest the guest immediately aborts. I can remove an already
>>>>>> attached CD/DVD image with no issues. I can't seem to find the trigger
>>>>>> that is causing this issue. Anyway I thought you should know.
>>>>> How about enabling core dumps and looking where it crashes? I tried a
>>>>> few CD unmount/mount combinations, and couldn't trigger any problems,
>>>>> neither in VBoxSVC nor in the GUI.
>>>>>
>>>>> Klaus
>>>>>
>>>>>> Linux host guest does not matter.
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>>
>>
>>
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