This is a note to let you know that I've just added the patch titled
x86/ldt: Further fix FPU emulation
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-ldt-further-fix-fpu-emulation.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 12e244f4b550498bbaf654a52f93633f7dde2dc7 Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@xxxxxxxxxx>
Date: Fri, 14 Aug 2015 15:02:55 -0700
Subject: x86/ldt: Further fix FPU emulation
From: Andy Lutomirski <luto@xxxxxxxxxx>
commit 12e244f4b550498bbaf654a52f93633f7dde2dc7 upstream.
The previous fix confused a selector with a segment prefix. Fix it.
Compile-tested only.
Cc: Juergen Gross <jgross@xxxxxxxx>
Reported-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Fixes: 4809146b86c3 ("x86/ldt: Correct FPU emulation access to LDT")
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/math-emu/get_address.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/math-emu/get_address.c
+++ b/arch/x86/math-emu/get_address.c
@@ -157,7 +157,7 @@ static long pm_address(u_char FPU_modrm,
addr->selector = PM_REG_(segment);
}
- descriptor = FPU_get_ldt_descriptor(segment);
+ descriptor = FPU_get_ldt_descriptor(addr->selector);
base_address = SEG_BASE_ADDR(descriptor);
address = base_address + offset;
limit = base_address
Patches currently in stable-queue which might be from luto@xxxxxxxxxx are
queue-4.1/x86-ldt-correct-ldt-access-in-single-stepping-logic.patch
queue-4.1/x86-ldt-correct-fpu-emulation-access-to-ldt.patch
queue-4.1/x86-ldt-make-modify_ldt-synchronous.patch
queue-4.1/x86-ldt-further-fix-fpu-emulation.patch
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