This is a note to let you know that I've just added the patch titled
KVM: x86/emulator: Fix handing of POP SS to correctly set interruptibility
to the 5.19-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:
kvm-x86-emulator-fix-handing-of-pop-ss-to-correctly-set-interruptibility.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6aa5c47c351b22c21205c87977c84809cd015fcf Mon Sep 17 00:00:00 2001
From: Michal Luczaj <mhal@xxxxxxx>
Date: Mon, 22 Aug 2022 00:06:47 +0200
Subject: KVM: x86/emulator: Fix handing of POP SS to correctly set interruptibility
From: Michal Luczaj <mhal@xxxxxxx>
commit 6aa5c47c351b22c21205c87977c84809cd015fcf upstream.
The emulator checks the wrong variable while setting the CPU
interruptibility state, the target segment is embedded in the instruction
opcode, not the ModR/M register. Fix the condition.
Signed-off-by: Michal Luczaj <mhal@xxxxxxx>
Fixes: a5457e7bcf9a ("KVM: emulate: POP SS triggers a MOV SS shadow too")
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/all/20220821215900.1419215-1-mhal@xxxxxxx
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1955,7 +1955,7 @@ static int em_pop_sreg(struct x86_emulat
if (rc != X86EMUL_CONTINUE)
return rc;
- if (ctxt->modrm_reg == VCPU_SREG_SS)
+ if (seg == VCPU_SREG_SS)
ctxt->interruptibility = KVM_X86_SHADOW_INT_MOV_SS;
if (ctxt->op_bytes > 2)
rsp_increment(ctxt, ctxt->op_bytes - 2);
Patches currently in stable-queue which might be from mhal@xxxxxxx are
queue-5.19/kvm-x86-emulator-fix-handing-of-pop-ss-to-correctly-set-interruptibility.patch
