NoWrite instructions (e.g. cmp or test) never set the "write access" bit in the error code, even if one of the operands is treated as a destination.
Fixes: c205fb7d7d4f81e46fc577b707ceb9e356af1456 Cc: Nadav Amit <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]> --- arch/x86/kvm/emulate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 81dcf7964701..a943bf0c06d0 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -4954,7 +4954,8 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) rc = segmented_read(ctxt, ctxt->dst.addr.mem, &ctxt->dst.val, ctxt->dst.bytes); if (rc != X86EMUL_CONTINUE) { - if (rc == X86EMUL_PROPAGATE_FAULT && + if (!(ctxt->d & NoWrite) && + rc == X86EMUL_PROPAGATE_FAULT && ctxt->exception.vector == PF_VECTOR) ctxt->exception.error_code |= PFERR_WRITE_MASK; goto done; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
