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-rw-r--r--target-i386/op_helper.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index 25e079b8fd..be092637a0 100644
--- a/target-i386/op_helper.c
+++ b/target-i386/op_helper.c
@@ -3241,6 +3241,8 @@ target_ulong helper_lsl(target_ulong selector1)
selector = selector1 & 0xffff;
eflags = helper_cc_compute_all(CC_OP);
+ if ((selector & 0xfffc) == 0)
+ goto fail;
if (load_segment(&e1, &e2, selector) != 0)
goto fail;
rpl = selector & 3;