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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, maz@kernel.org, drjones@redhat.com,
	alexandru.elisei@arm.com
Cc: shuah@kernel.org, pbonzini@redhat.com
Subject: [PATCH v5 1/8] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read
Date: Sun,  4 Apr 2021 19:22:36 +0200	[thread overview]
Message-ID: <20210404172243.504309-2-eric.auger@redhat.com> (raw)
In-Reply-To: <20210404172243.504309-1-eric.auger@redhat.com>

The doc says:
"The characteristics of a specific redistributor region can
 be read by presetting the index field in the attr data.
 Only valid for KVM_DEV_TYPE_ARM_VGIC_V3"

Unfortunately the existing code fails to read the input attr data.

Fixes: 04c110932225 ("KVM: arm/arm64: Implement KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION")
Cc: stable@vger.kernel.org#v4.17+
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>

---

v1 -> v2:
- in the commit message, remove the statement that the index always is 0
- add Alexandru's R-b
---
 arch/arm64/kvm/vgic/vgic-kvm-device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c
index 44419679f91a..2f66cf247282 100644
--- a/arch/arm64/kvm/vgic/vgic-kvm-device.c
+++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c
@@ -226,6 +226,9 @@ static int vgic_get_common_attr(struct kvm_device *dev,
 		u64 addr;
 		unsigned long type = (unsigned long)attr->attr;
 
+		if (copy_from_user(&addr, uaddr, sizeof(addr)))
+			return -EFAULT;
+
 		r = kvm_vgic_addr(dev->kvm, type, &addr, false);
 		if (r)
 			return (r == -ENODEV) ? -ENXIO : r;
-- 
2.26.3

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WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, maz@kernel.org, drjones@redhat.com,
	alexandru.elisei@arm.com
Cc: james.morse@arm.com, suzuki.poulose@arm.com, shuah@kernel.org,
	pbonzini@redhat.com
Subject: [PATCH v5 1/8] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read
Date: Sun,  4 Apr 2021 19:22:36 +0200	[thread overview]
Message-ID: <20210404172243.504309-2-eric.auger@redhat.com> (raw)
In-Reply-To: <20210404172243.504309-1-eric.auger@redhat.com>

The doc says:
"The characteristics of a specific redistributor region can
 be read by presetting the index field in the attr data.
 Only valid for KVM_DEV_TYPE_ARM_VGIC_V3"

Unfortunately the existing code fails to read the input attr data.

Fixes: 04c110932225 ("KVM: arm/arm64: Implement KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION")
Cc: stable@vger.kernel.org#v4.17+
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>

---

v1 -> v2:
- in the commit message, remove the statement that the index always is 0
- add Alexandru's R-b
---
 arch/arm64/kvm/vgic/vgic-kvm-device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c
index 44419679f91a..2f66cf247282 100644
--- a/arch/arm64/kvm/vgic/vgic-kvm-device.c
+++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c
@@ -226,6 +226,9 @@ static int vgic_get_common_attr(struct kvm_device *dev,
 		u64 addr;
 		unsigned long type = (unsigned long)attr->attr;
 
+		if (copy_from_user(&addr, uaddr, sizeof(addr)))
+			return -EFAULT;
+
 		r = kvm_vgic_addr(dev->kvm, type, &addr, false);
 		if (r)
 			return (r == -ENODEV) ? -ENXIO : r;
-- 
2.26.3


  reply	other threads:[~2021-04-04 17:23 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-04 17:22 [PATCH v5 0/8] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
2021-04-04 17:22 ` Eric Auger
2021-04-04 17:22 ` Eric Auger [this message]
2021-04-04 17:22   ` [PATCH v5 1/8] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read Eric Auger
2021-04-04 17:22 ` [PATCH v5 2/8] KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base() Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-04 17:22 ` [PATCH v5 3/8] KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy() Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-04 17:22 ` [PATCH v5 4/8] docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-04 17:22 ` [PATCH v5 5/8] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write] Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-04 17:22 ` [PATCH v5 6/8] kvm: arm64: vgic-v3: Introduce vgic_v3_free_redist_region() Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-04 17:22 ` [PATCH v5 7/8] KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-05 10:10   ` Marc Zyngier
2021-04-05 10:10     ` Marc Zyngier
2021-04-05 16:27     ` Auger Eric
2021-04-05 16:27       ` Auger Eric
2021-04-04 17:22 ` [PATCH v5 8/8] KVM: selftests: aarch64/vgic-v3 init sequence tests Eric Auger
2021-04-04 17:22   ` Eric Auger
2021-04-05 10:12 ` [PATCH v5 0/8] KVM/ARM: Some vgic fixes and init sequence KVM selftests Marc Zyngier
2021-04-05 10:12   ` Marc Zyngier
2021-04-05 16:30   ` Auger Eric
2021-04-05 16:30     ` Auger Eric

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