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Sheng Yang 571008dacc KVM: x86 emulator: Only allow VMCALL/VMMCALL trapped by #UD ... When executing a test program called "crashme", we found the KVM guest cannot survive more than ten seconds, then encounterd kernel panic. The basic concept of "crashme" is generating random assembly code and trying to execute it. After some fixes on emulator insn validity judgment, we found it's hard to get the current emulator handle the invalid instructions correctly, for the #UD trap for hypercall patching caused troubles. The problem is, if the opcode itself was OK, but combination of opcode and modrm_reg was invalid, and one operand of the opcode was memory (SrcMem or DstMem), the emulator will fetch the memory operand first rather than checking the validity, and may encounter an error there. For example, ".byte 0xfe, 0x34, 0xcd" has this problem. In the patch, we simply check that if the invalid opcode wasn't vmcall/vmmcall, then return from emulate_instruction() and inject a #UD to guest. With the patch, the guest had been running for more than 12 hours. Signed-off-by: Feng (Eric) Liu <eric.e.liu@intel.com> Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>		17 years ago
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boot	x86: unify arch/x86/boot/compressed/misc_??.c	17 years ago
configs	x86: Set CFQ as default in 32-bit defconfig	17 years ago
crypto	…
ia32	x86: remove unneded casts	17 years ago
kernel	x86: fix overlap between pagetable with bss section	17 years ago
kvm	KVM: x86 emulator: Only allow VMCALL/VMMCALL trapped by #UD	17 years ago
lguest	x86: remove depends on X86_32 from PARAVIRT & PARAVIRT_GUEST	17 years ago
lib	x86: fix usage of .section .sched.text in assembler code	17 years ago
mach-default	…
mach-es7000	…
mach-generic	…
mach-rdc321x	x86: add support for the RDC R-321x SoC	17 years ago
mach-visws	x86: cleanup mpspec variants	17 years ago
mach-voyager	x86: convert TSC disabling to generic cpuid disable bitmap	17 years ago
math-emu	x86: arch/x86/math-emu/errors.c: fix printk warnings	17 years ago
mm	x86: fix nodemap_size according to nodeid bits	17 years ago
oprofile	x86: rename stack_pointer to kernel_trap_sp	17 years ago
pci	x86: serverworks: IRQ routing needs no _p	17 years ago
power	x86: make __{save,restore}_processor_state static	17 years ago
vdso	x86: add vdso32-int80-syms.lds to .gitignore	17 years ago
video	…
xen	x86: return the page table level in lookup_address()	17 years ago
Kconfig	KVM: Move arch dependent files to new directory arch/x86/kvm/	17 years ago
Kconfig.cpu	x86: reduce CONFIG_X86_PPRO_FENCE bloat	17 years ago
Kconfig.debug	x86: cpa: fix the self-test	17 years ago
Makefile	KVM: Move arch dependent files to new directory arch/x86/kvm/	17 years ago
Makefile_32.cpu	…