This is a note to let you know that I've just added the patch titled
arm/arm64: KVM: Fix set_clear_sgi_pend_reg offset
to the 3.14-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:
arm-arm64-kvm-fix-set_clear_sgi_pend_reg-offset.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0fea6d7628ed6e25a9ee1b67edf7c859718d39e8 Mon Sep 17 00:00:00 2001
From: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
Date: Thu, 25 Sep 2014 18:41:07 +0200
Subject: arm/arm64: KVM: Fix set_clear_sgi_pend_reg offset
From: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
commit 0fea6d7628ed6e25a9ee1b67edf7c859718d39e8 upstream.
The sgi values calculated in read_set_clear_sgi_pend_reg() and
write_set_clear_sgi_pend_reg() were horribly incorrectly multiplied by 4
with catastrophic results in that subfunctions ended up overwriting
memory not allocated for the expected purpose.
This showed up as bugs in kfree() and the kernel complaining a lot of
you turn on memory debugging.
This addresses: http://marc.info/?l=kvm&m=141164910007868&w=2
Reported-by: Shannon Zhao <zhaoshenglong@xxxxxxxxxx>
Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
virt/kvm/arm/vgic.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -674,7 +674,7 @@ static bool read_set_clear_sgi_pend_reg(
{
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
int sgi;
- int min_sgi = (offset & ~0x3) * 4;
+ int min_sgi = (offset & ~0x3);
int max_sgi = min_sgi + 3;
int vcpu_id = vcpu->vcpu_id;
u32 reg = 0;
@@ -695,7 +695,7 @@ static bool write_set_clear_sgi_pend_reg
{
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
int sgi;
- int min_sgi = (offset & ~0x3) * 4;
+ int min_sgi = (offset & ~0x3);
int max_sgi = min_sgi + 3;
int vcpu_id = vcpu->vcpu_id;
u32 reg;
Patches currently in stable-queue which might be from christoffer.dall@xxxxxxxxxx are
queue-3.14/arm-arm64-kvm-fix-set_clear_sgi_pend_reg-offset.patch
queue-3.14/arm-arm64-kvm-fix-use-of-wnr-bit-in-kvm_is_write_fault.patch
queue-3.14/kvm-arm-vgic-plug-irq-injection-race.patch
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