Segfault in vmsvgaR3PortReportMonitorPositions (vboxvga)

[Max Fedotov]

Linux with 4.2.0 kernel (Astra Linux 1.5) crashes VM upon login with legacy vboxvga controller. Host: Fedora 32, guest: Astra Linux 1.5

#0  0x00007f0aeb03ad7e in vmsvgaR3PortReportMonitorPositions(PDMIDISPLAYPORT*, unsigned int, RTPOINT*) () from /usr/lib64/virtualbox/VBoxDD.so
No symbol table info available.
#1  0x00007f0b325a79b8 in Display::i_handleUpdateMonitorPositions(unsigned int, RTPOINT*) () from /usr/lib64/virtualbox/components/VBoxC.so
No symbol table info available.
#2  0x00007f0b325ca018 in vmmdevUpdateMonitorPositions(PDMIVMMDEVCONNECTOR*, unsigned int, RTPOINT*) () from /usr/lib64/virtualbox/components/VBoxC.so
No symbol table info available.
#3  0x00007f0aeaffe7b1 in vmmdevRequestHandler(PDMDEVINSR3*, void*, unsigned short, unsigned int, unsigned int) () from /usr/lib64/virtualbox/VBoxDD.so
No symbol table info available.
#4  0x00007f0b38310922 in IOMIOPortWrite () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#5  0x00007f0b38208be2 in IOMR3ProcessForceFlag () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#6  0x00007f0b381ff4e5 in emR3HighPriorityPostForcedActions () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#7  0x00007f0b38202ef2 in emR3HmExecute () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#8  0x00007f0b38200c4e in EMR3ExecuteVM () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#9  0x00007f0b382635f0 in vmR3EmulationThreadWithId(RTTHREADINT*, UVMCPU*, unsigned int) () from /usr/lib64/virtualbox/components/VBoxVMM.so
No symbol table info available.
#10 0x00007f0b54e17f14 in rtThreadMain () from /usr/lib64/virtualbox/VBoxRT.so
No symbol table info available.
#11 0x00007f0b54ece55e in rtThreadNativeMain(void*) () from /usr/lib64/virtualbox/VBoxRT.so
No symbol table info available.
#12 0x00007f0b551b9432 in start_thread () from /app/lib64/libpthread.so.0
No symbol table info available.
#13 0x00007f0b550e09d3 in clone () from /app/lib64/libc.so.6
No symbol table info available.

[Max Fedotov]

VM log file

[gombara]

This has been fixed and the fix will be available in the next release. Note that using vmsvga circumvents this problem. Thanks.