[root@hydra vbaa]# gdb /usr/lib/virtualbox/VBoxHeadless GNU gdb (GDB) 7.8.1 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/lib/virtualbox/VBoxHeadless...done. (gdb) run -s any -f '/tmp/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' -c Starting program: /usr/lib/virtualbox/VBoxHeadless -s any -f '/tmp/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' -c warning: Could not load shared library symbols for linux-vdso.so.1. Do you need "set solib-search-path" or "set sysroot"? [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". [New Thread 0x7fdb081aa700 (LWP 24675)] [New Thread 0x7fdb079a9700 (LWP 24676)] [Thread 0x7fdb079a9700 (LWP 24676) exited] [Thread 0x7fdb081aa700 (LWP 24675) exited] Oracle VM VirtualBox Headless Interface 4.3.20_OSE (C) 2008-2014 Oracle Corporation All rights reserved. [New Thread 0x7fdb0c364700 (LWP 24677)] [New Thread 0x7fdb0c32a700 (LWP 24678)] [New Thread 0x7fdb0c309700 (LWP 24679)] [New Thread 0x7fdb0c288700 (LWP 24680)] [New Thread 0x7fdb0c207700 (LWP 24690)] [New Thread 0x7fdb04683700 (LWP 24691)] [New Thread 0x7fdb0415b700 (LWP 24701)] [New Thread 0x7fdaf7cbe700 (LWP 24702)] [New Thread 0x7fdaf6833700 (LWP 24703)] [New Thread 0x7fdaf65a7700 (LWP 24704)] [New Thread 0x7fdaf631e700 (LWP 24705)] [New Thread 0x7fdaf4a56700 (LWP 24706)] [New Thread 0x7fdaf49d5700 (LWP 24707)] [New Thread 0x7fdaf40e4700 (LWP 24708)] [New Thread 0x7fdada801700 (LWP 24709)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fdb0415b700 (LWP 24701)] vdmaVBVACtlSubmit (pVdma=0x0, pCtl=0x7fdb0415aca0, enmSource=VBVAEXHOSTCTL_SOURCE_HOST, pfnComplete=0x7fdadb6ac2e0 , pvComplete=0x7fdb0415ac50) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp:2831 2831 int rc = VBoxVBVAExHCtlSubmit(&pVdma->CmdVbva, pCtl, enmSource, pfnComplete, pvComplete); (gdb) bt #0 vdmaVBVACtlSubmit (pVdma=0x0, pCtl=0x7fdb0415aca0, enmSource=VBVAEXHOSTCTL_SOURCE_HOST, pfnComplete=0x7fdadb6ac2e0 , pvComplete=0x7fdb0415ac50) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp:2831 #1 0x00007fdadb6ae3d9 in vdmaVBVACtlSubmitSync (pVdma=pVdma@entry=0x0, pCtl=pCtl@entry=0x7fdb0415aca0, enmSource=VBVAEXHOSTCTL_SOURCE_HOST) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp:3120 #2 0x00007fdadb6ae5ab in vdmaVBVACtlDisableSync (pVdma=pVdma@entry=0x0) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp:1144 #3 0x00007fdadb6b07f1 in vboxVDMADestruct (pVdma=0x0) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp:2758 #4 0x00007fdadb642ba0 in vgaR3Destruct (pDevIns=0x7fdb04007000) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Devices/Graphics/DevVGA.cpp:5770 #5 0x00007fdb041e5e5c in PDMR3Term (pVM=pVM@entry=0x7fdb0403b000) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/PDM.cpp:687 #6 0x00007fdb041e6108 in PDMR3Init (pVM=0x7fdb0403b000) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/PDM.cpp:433 #7 0x00007fdb042435eb in vmR3InitRing3 (pUVM=, pVM=) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/VM.cpp:987 #8 vmR3CreateU (pUVM=0x7fdaf7e00000, cCpus=, pfnCFGMConstructor=, pvUserCFGM=) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/VM.cpp:654 #9 0x00007fdb04247543 in vmR3ReqProcessOneU (pUVM=pUVM@entry=0x7fdaf7e00000, pReq=0x7fdaf0007470) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/VMReq.cpp:1254 #10 0x00007fdb04248620 in VMR3ReqProcessU (pUVM=0x7fdaf7e00000, idDstCpu=4294967284, fPriorityOnly=) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/VMReq.cpp:1170 #11 0x00007fdb04246703 in vmR3EmulationThreadWithId (ThreadSelf=, pUVCpu=0x7fdaf7e01f20, idCpu=0) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/VMM/VMMR3/VMEmt.cpp:123 #12 0x00007fdb0b63a1ec in rtThreadMain (pThread=0x7fdaf00068e0, NativeThread=, pszThreadName=) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Runtime/common/misc/thread.cpp:712 #13 0x00007fdb0b6b5fab in rtThreadNativeMain (pvArgs=0x7fdaf00068e0) at /home/fmunozs/vboxdbg/virtualbox/src/VirtualBox-4.3.20/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 #14 0x00007fdb0bf31314 in start_thread () from /usr/lib/libpthread.so.0 #15 0x00007fdb0ba6b5bd in clone () from /usr/lib/libc.so.6 (gdb) i r rax 0x10 16 rbx 0x0 0 rcx 0x7fdadb6ac2e0 140577960805088 rdx 0x1 1 rsi 0x7fdb0415aca0 140578643094688 rdi 0x0 0 rbp 0x7fdb0415ac40 0x7fdb0415ac40 rsp 0x7fdb0415ac00 0x7fdb0415ac00 r8 0x7fdb0415ac50 140578643094608 r9 0xffffffff 4294967295 r10 0x0 0 r11 0x0 0 r12 0x7fdb0415ac50 140578643094608 r13 0x0 0 r14 0x7fdb0415aca0 140578643094688 r15 0x0 0 rip 0x7fdadb6add09 0x7fdadb6add09 eflags 0x10206 [ PF IF RF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 (gdb)