Several VBoxSDL segfaults, during WindowsXP guest shutdowns, opensuse 10.3 32bit host

[Christopher]

Hello, first of all, thanks for your great work.

Problem: VBoxSDL segfaults in about 1 out of 20 runs. Details: Most of the time, the segfaults occure during WindowsXP shutdowns, but very rarely also while working with some program, e.g. web-surfing (latter might be something completely different).

I found no reproducible conditions. Sessions started (most of the time) from same image; changes were written to a new snapshot file. Other versions: The same (or similar) problem (with segfaults during shutdown) was found with VBoxDSL 1.5.2. The "normal" VirtualBox did not show this effect (which might be just a matter of statistics).

Guest: WindowsXP including all patches and much add software (~10GB), guest-additions 1.5.4 installed, shared folders added (but not used)

Host: OpenSUSE 10.3 32 bit including all patches USB-Mount in /etc/fstab (2305=vboxusers) (if it's important at all):

usbfs on /proc/bus/usb type usbfs (rw,devgid=2305,devmode=640)

SGID-vboxusers: VBoxDSL is started with SGID-vboxusers wrapper, which hopefully should not be the problem.

Hardware: Athlon 64 X2 or Pentium 4 (segfaults on both hardware architectures)

(tested on several different computers, so it seems NOT to be a hardware defect)

Binary: virtualbox.org/download/1.5.4/VirtualBox-1.5.4_27034_openSUSE103-1.i586.rpm

Core: Size of core-dump 1.3 GB. After bzip2 ~70MB.

Dont' know, if I should post such large core files on this list. Can you give me instructions, were to put the core files (I have two different ones at the moment - both segfaults at shutdown)

Can you please help? Many Thanks.

VBox.log:

Intrestingly, all VBoxDSL runs *WITHOUT* segfaults show an "ERROR" tag at the end, where in runs *WITH* segfaults, the ERROR line is missing. (This only applies to the shutdown-segfault cases.)

(... many lines cut out ...)
00:02:21.600 ********************* End of statistics **********************
00:02:22.186 Changing the VM state from 'DESTROYING' to 'TERMINATED'.
00:02:22.299 vboxClipboardDestroy: shutting down host clipboard
00:02:22.300 vboxClipboardThread: clipboard thread terminated successfully with return code VINF_SUCCESS
00:02:22.630 ERROR [COM]: aRC=0x8000ffff aIID={09789f63-4525-48e5-a5e4-1080453b0eab} aComponent={Display} aText={The object is not ready} aPreserve=false

[Christopher]

VBoxDSL is wrong. Sorry. VBoxSDL is correct.

[Frank Mehnert]

Please could you upload your compressed core dump to ​http://www.rapidshare.de?

[Christopher]

Both cores are "shutdown-time-cores" (Host: VBoxSDL 1.5.4 32bit OpenSUSE 10.3, Guest: WindowsXP):
1st core: ​http://rapidshare.de/files/38430560/core.6543.bz2.html
2nd core: ​http://rapidshare.de/files/38430420/core.7751.bz2.html

[Frank Mehnert]

Thanks for the core dumps. Both dumps refer to the same code position. The problem is related to our clipboard code. We are investigating.

[Michael Thayer]

Updated clipboard handler for VirtualBox 1.5.4, for 32bit Linux hosts with glibc 2.4 or newer

[Michael Thayer]

Chris, could you try the updated clipboard library which I have attached? Replace the corresponding file in your VirtualBox installation, after backing it up of course.

[Christopher]

It seems, that the new VBoxSharedClipboard.so solved the segfault-problem.

-rwxr-xr-x 1 root root 110547  8. Feb 14:26 /usr/lib/VBoxSharedClipboard.so
-rwxr-xr-x 1 root root  30200  8. Feb 14:26 /usr/lib/VBoxSharedClipboard.so.orig-1.5.4

The problem had some statistical features, but up to now about 150 VBoxSDL starts without any segfault seems promising.

Thanks for your help.

[Frank Mehnert]

We hope that VirtualBox 1.5.6 fixes your issues. Please could you try this version?

[Christopher]

Up to now (one week of using it) VBoxSDL 1.5.6 did not show this segfault again. So I assume, that the problem is fixed now. Many thanks.

[Frank Mehnert]

Thank you for the response.