Patch "KVM: arm/arm64: vgic: Preserve the revious read from the pending table" has been added to the 4.14-stable tree

Patch "KVM: arm/arm64: vgic: Preserve the revious read from the pending table" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    KVM: arm/arm64: vgic: Preserve the revious read from the pending table

to the 4.14-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:
     kvm-arm-arm64-vgic-preserve-the-revious-read-from-the-pending-table.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ddb4b0102cb9cdd2398d98b3e1e024e08a2f4239 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Thu, 16 Nov 2017 17:58:16 +0000
Subject: KVM: arm/arm64: vgic: Preserve the revious read from the pending table

From: Marc Zyngier <marc.zyngier@arm.com>

commit ddb4b0102cb9cdd2398d98b3e1e024e08a2f4239 upstream.

The current pending table parsing code assumes that we keep the
previous read of the pending bits, but keep that variable in
the current block, making sure it is discarded on each loop.

We end-up using whatever is on the stack. Who knows, it might
just be the right thing...

Fixes: 280771252c1ba ("KVM: arm64: vgic-v3: KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES")
Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 virt/kvm/arm/vgic/vgic-v3.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -324,13 +324,13 @@ int vgic_v3_save_pending_tables(struct k
 	int last_byte_offset = -1;
 	struct vgic_irq *irq;
 	int ret;
+	u8 val;
 
 	list_for_each_entry(irq, &dist->lpi_list_head, lpi_list) {
 		int byte_offset, bit_nr;
 		struct kvm_vcpu *vcpu;
 		gpa_t pendbase, ptr;
 		bool stored;
-		u8 val;
 
 		vcpu = irq->target_vcpu;
 		if (!vcpu)


Patches currently in stable-queue which might be from marc.zyngier@arm.com are

queue-4.14/arm-kvm-fix-vttbr_baddr_mask-bug_on-off-by-one.patch
queue-4.14/kvm-arm-arm64-vgic-its-check-result-of-allocation-before-use.patch
queue-4.14/kvm-arm-arm64-vgic-preserve-the-revious-read-from-the-pending-table.patch
queue-4.14/kvm-arm-arm64-vgic-irqfd-fix-msi-entry-allocation.patch
queue-4.14/bus-arm-cci-fix-use-of-smp_processor_id-in-preemptible-context.patch
queue-4.14/arm64-kvm-fix-vttbr_baddr_mask-bug_on-off-by-one.patch
queue-4.14/bus-arm-ccn-fix-use-of-smp_processor_id-in-preemptible-context.patch