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[Qemu-devel] [PATCH] x86: Add NULL check to lsl
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH] x86: Add NULL check to lsl |
Date: |
Mon, 16 Mar 2009 18:52:07 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
According to the Intel specs, lsl performs a check against NULL for the
provided selector, just like lar does. helper_lar() includes the
corresponding code, helper_lsl() was lacking it so far.
Signed-off-by: Jan Kiszka <address@hidden>
---
target-i386/op_helper.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index 25e079b..be09263 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;
- [Qemu-devel] [PATCH] x86: Add NULL check to lsl,
Jan Kiszka <=