From: Paolo Bonzini <pbonzini@redhat.com>

Reject 0x66/0xf3/0xf2 in front of them.

Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 40a3ec7b5ffde500789d016660a171057d6b467c)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index c4016314fb..20be036e1c 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -6049,7 +6049,8 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
             gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
             break;
         case 0xee: /* rdpkru */
-            if (prefixes & PREFIX_LOCK) {
+            if (s->prefix & (PREFIX_LOCK | PREFIX_DATA
+                             | PREFIX_REPZ | PREFIX_REPNZ)) {
                 goto illegal_op;
             }
             tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_ECX]);
@@ -6057,7 +6058,8 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
             tcg_gen_extr_i64_tl(cpu_regs[R_EAX], cpu_regs[R_EDX], s->tmp1_i64);
             break;
         case 0xef: /* wrpkru */
-            if (prefixes & PREFIX_LOCK) {
+            if (s->prefix & (PREFIX_LOCK | PREFIX_DATA
+                             | PREFIX_REPZ | PREFIX_REPNZ)) {
                 goto illegal_op;
             }
             tcg_gen_concat_tl_i64(s->tmp1_i64, cpu_regs[R_EAX],
-- 
2.39.2