From: Jan Kiszka <[email protected]> Stop the switch immediately if task_switch_16/32 returned an error. Only if that step succeeded, the switch should actually take place and update any register states.
Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 083b269..aace565 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2402,6 +2402,8 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, else ret = task_switch_16(ctxt, ops, tss_selector, old_tss_sel, old_tss_base, &next_tss_desc); + if (ret != X86EMUL_CONTINUE) + return ret; if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) ctxt->eflags = ctxt->eflags | X86_EFLAGS_NT; -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
