This is a note to let you know that I've just added the patch titled
MIPS: KVM: Do not sign extend on unsigned MMIO load
to the 3.10-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:
mips-kvm-do-not-sign-extend-on-unsigned-mmio-load.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ed9244e6c534612d2b5ae47feab2f55a0d4b4ced Mon Sep 17 00:00:00 2001
From: Nicholas Mc Guire <hofrat@xxxxxxxxx>
Date: Thu, 7 May 2015 14:47:50 +0200
Subject: MIPS: KVM: Do not sign extend on unsigned MMIO load
From: Nicholas Mc Guire <hofrat@xxxxxxxxx>
commit ed9244e6c534612d2b5ae47feab2f55a0d4b4ced upstream.
Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.
Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
Reviewed-by: James Hogan <james.hogan@xxxxxxxxxx>
Tested-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Gleb Natapov <gleb@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kvm/kvm_mips_emul.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/mips/kvm/kvm_mips_emul.c
+++ b/arch/mips/kvm/kvm_mips_emul.c
@@ -1626,7 +1626,7 @@ kvm_mips_complete_mmio_load(struct kvm_v
if (vcpu->mmio_needed == 2)
*gpr = *(int16_t *) run->mmio.data;
else
- *gpr = *(int16_t *) run->mmio.data;
+ *gpr = *(uint16_t *)run->mmio.data;
break;
case 1:
Patches currently in stable-queue which might be from hofrat@xxxxxxxxx are
queue-3.10/mips-kvm-do-not-sign-extend-on-unsigned-mmio-load.patch
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