x86/ldt: Further fix FPU emulation

The previous fix confused a selector with a segment prefix.  Fix it.

Compile-tested only.

Cc: [email protected]
Cc: Juergen Gross <[email protected]>
Reported-by: Linus Torvalds <[email protected]>
Fixes: 4809146b86c3 ("x86/ldt: Correct FPU emulation access to LDT")
Signed-off-by: Andy Lutomirski <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/arch/x86/math-emu/get_address.c b/arch/x86/math-emu/get_address.c
index d13cab2aec454ecfecda32599f9939e5891cf126..8300db71c2a62681006e137350961742190ec9dc 100644 (file)
--- 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, u_char segment,
                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