FAILED: patch "[PATCH] KVM: x86: Set error code to segment selector on LLDT/LTR" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2626206963ace9e8bf92b6eea5ff78dd674c555c Mon Sep 17 00:00:00 2001
From: Sean Christopherson <[email protected]>
Date: Mon, 11 Jul 2022 23:27:49 +0000
Subject: [PATCH] KVM: x86: Set error code to segment selector on LLDT/LTR
non-canonical #GP

When injecting a #GP on LLDT/LTR due to a non-canonical LDT/TSS base, set the error code to the selector. Intel SDM's says nothing about the #GP, but AMD's APM explicitly states that both LLDT and LTR set the error code to the selector, not zero.

Note, a non-canonical memory operand on LLDT/LTR does generate a #GP(0), but the KVM code in question is specific to the base from the descriptor.

index 09e4b67b881f..bd9e9c5627d0 100644
@@ -1736,8 +1736,8 @@ static int __load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
 		if (ret != X86EMUL_CONTINUE)
 			return ret;
 		if (emul_is_noncanonical_address(get_desc_base(&seg_desc) |
-				((u64)base3 << 32), ctxt))
-			return emulate_gp(ctxt, 0);
+						 ((u64)base3 << 32), ctxt))
+			return emulate_gp(ctxt, err_code);
 	}
 
 	if (seg == VCPU_SREG_TR) {