crash> bt PID: 19036 TASK: ffff880c55d68040 CPU: 3 COMMAND: "EMT-4" #0 [ffff880c6fc26d80] machine_kexec at ffffffff81028b47 #1 [ffff880c6fc26de0] crash_kexec at ffffffff8107ecfc #2 [ffff880c6fc26ea0] panic at ffffffff8134a543 #3 [ffff880c6fc26f20] do_nmi at ffffffff81352056 #4 [ffff880c6fc26f50] nmi at ffffffff813517a0 [exception RIP: unknown or invalid address] RIP: ffffffffa05236b2 RSP: ffff880c53bebc70 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffc900170bc000 RDX: ffff880c53bebd20 RSI: ffff880c53bebd48 RDI: 0000000000004404 RBP: ffff880c53bebcd8 R8: ffff880c53bea000 R9: 00004542e9ffa3cc R10: 0000000080000202 R11: 0000000001be2f49 R12: ffff880c53bebd20 R13: 0000000000000000 R14: ffffc900170bc000 R15: ffffc900170bc940 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 bt: WARNING: possibly bogus exception frame --- --- #6 [ffff880c53bebd28] rtR0MemAllocEx at ffffffffa03f97c6 [vboxdrv] #7 [ffff880c53bebe30] supdrvIOCtlFast at ffffffffa03f05a3 [vboxdrv] #8 [ffff880c53bebe40] VBoxDrvLinuxIOCtl_4_3_26 at ffffffffa03ed2a9 [vboxdrv] #9 [ffff880c53bebeb0] do_vfs_ioctl at ffffffff811087dd #10 [ffff880c53bebf30] sys_ioctl at ffffffff81108869 #11 [ffff880c53bebf80] system_call_fastpath at ffffffff81355f92 RIP: 00007f8e8f7349a7 RSP: 00007f8e83afbd18 RFLAGS: 00000246 RAX: 0000000000000010 RBX: ffffffff81355f92 RCX: 00000bac27598e0a RDX: 0000000000000004 RSI: 00000000000056c1 RDI: 0000000000000007 RBP: 00007f8e88092940 R8: 0000000001be2f49 R9: 00000000ffffffff R10: 0000000000000006 R11: 0000000000000246 R12: 00007f8e88063000 R13: 00007f8e83afbd30 R14: 00007f8e88092000 R15: 00007f8e88063000 ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b