VirtualBox 4.3.8 on Ubuntu 12.04 (AMD64) crashed multiple times in IsMultiMonitor() - SIGSEV

[wernerf]

I'm using Remote Desktop to connect to VMs running on Ubuntu from Windows 7.

VirtualBox 4.3.6 was stable in this environment, since the upgrade to 4.3.8 the VMs started crashing.

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ExecutablePath: /usr/lib/virtualbox/VBoxHeadless

Title: VBoxHeadless crashed with SIGSEV in IsMultiMonitor()

Thread 1 (Thread 0x7fac5fcfd700 (LWP 1376)): #0 IsMultiMonitor (this=<optimized out>) at /mnt/tinderbox/extpacks-4.3/src/VBox/RDP/server/vrdpclient.h:613 No locals. #1 VRDPServer::ProcessUpdateComplete (this=0x7fac6d42a010) at /mnt/tinderbox/extpacks-4.3/src/VBox/RDP/server/server.cpp:1144 fMultiMonitor = false rectClient = {x = 1607453584, y = 32684, w = 0, h = 0} uScreenId = 1610621360 redraw = {cRectsClient = 0, aRectsClient = {{rectRedraw = {x = 0, y = 0, w = 1919, h = 1079}}, {rectRedraw = {x = 0, y = 0, w = 1921, h = 1081}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}, {rectRedraw = {x = 0, y = 0, w = 0, h = 0}}}, cRectsShadowBuffer = 0, aRectsShadowBuffer = {{rectRedraw = {x = 0, y = 0, w = 0, h = 0}, uScreenId = 0} <repeats 32 times>}, fFullscreen = false} rc = 0 u32ClientId = 8 pClient = 0x7fac54001400 #2 0x00007fac6e14bd1c in ?? () from /usr/lib/virtualbox/components/VBoxC.so No symbol table info available. #3 0x00007fac3b583981 in ?? () from /usr/lib/virtualbox/VBoxDD.so No symbol table info available. #4 0x00007fac6e8537be in ?? () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #5 0x00007fac6e856634 in TMR3TimerQueuesDo () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #6 0x00007fac6e7f7358 in ?? () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #7 0x00007fac6e7fb2ba in ?? () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #8 0x00007fac6e7f8751 in ?? () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #9 0x00007fac6e85fb8e in ?? () from /usr/lib/virtualbox/components/VBoxVMM.so No symbol table info available. #10 0x00007fac759b938c in ?? () from /usr/lib/virtualbox/VBoxRT.so No symbol table info available. #11 0x00007fac75a1bdcc in ?? () from /usr/lib/virtualbox/VBoxRT.so No symbol table info available. #12 0x00007fac76280e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #13 0x00007fac75da93fd in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #14 0x0000000000000000 in ?? ()

[sunlover]

Please attach VBox.log of the crashed VM.

[Frank Mehnert]

Thank you for the log files. Could you also provide a core dump?

[wernerf]

I should have added that the Windows VM only crashed towards the end of applying Windows updates while restarting or about to restart the VM. Every time I applied Windows updates the VM crashed. With the recently released Patch Tuesday updates from Microsoft the VM is now stable. Updates to Ubuntu was also applied.

This might have been a Windows bug that is now resolved, as the Windows VM is not rock solid.

Please close this ticket. I'll log a new ticket if I see this error happen again, and will ensure that I capture all required information including a core dump.

Thanks,

Werner

[Frank Mehnert]

Thanks!